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Science M.C.Q

P-1 Question Bank · Maharashtra Board STD 10 (MSBSHSE - Semi English Medium). 134 questions.

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M.C.Q

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134 questions · auto-graded multiple-choice test.

MCQ 11 Mark
The astronomical object closest to us is the $………$
  • ✓
    Moon
  • B
    Mars
  • C
    Saturn
  • D
    Mercury
Answer
Correct option: A.
Moon
Moon
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MCQ 21 Mark
A group of students from $\text{COEP}$ Pune sent a small satellite $…….$ through $\text{ISRO}$ in $2016.$
  • A
    Luna $6$
  • B
    Apollo $6$
  • ✓
    Swayam
  • D
    Param
Answer
Correct option: C.
Swayam
Swayam
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MCQ 31 Mark
If a spacecraft is to be sent to travel to outer space.it must have minimum velocity of $…………$
  • ✓
    $11.2 \ km/s$
  • B
    $11.6\ km/s$
  • C
    $13.2\ km/s$
  • D
    $1.4\ m/s$
Answer
Correct option: A.
$11.2 \ km/s$
$11.2 \ km/s$
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MCQ 41 Mark
The first artificial satellite $……$was sent to space by the Soviet Union in $1957.$
  • A
    Apollo
  • B
    Chandrayaan
  • ✓
    Sputnik
  • D
    Luna 2
Answer
Correct option: C.
Sputnik
Sputnik
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MCQ 51 Mark
The first person to step on the moon is $…….$
  • ✓
    Neil Armstrong
  • B
    Rakesh Sharma
  • C
    Kalpana Chawla
  • D
    Sunita Williams
Answer
Correct option: A.
Neil Armstrong
Neil Armstrong
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MCQ 61 Mark
Due to$………..$ we can gather information about worldwide events sitting at home.
  • A
    world wide web
  • ✓
    internet
  • C
    artificial satellite
  • D
    natural satellite
Answer
Correct option: B.
internet
internet
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MCQ 71 Mark
Generally,$……..$is called spirit.
  • A
    methanol
  • ✓
    ethanol
  • C
    propanol
  • D
    butanol
Answer
Correct option: B.
ethanol
ethanol
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MCQ 91 Mark
$…….$is one of the combustible components of $\text{L.P.G.}$
  • A
    Methane
  • B
    Ethane
  • C
    Propane
  • ✓
    Butane
Answer
Correct option: D.
Butane
Butane
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MCQ 101 Mark
The general molecular formula for the homologous series of alkynes is $………$
  • A
    $\mathrm{C}_n \mathrm{H}_{2 \mathrm{n}}$
  • B
    $\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}}+2$
  • ✓
    $C_n H_{2 n}-2$
  • D
    $\mathrm{C}_n \mathrm{H}_{2 n}-1$
Answer
Correct option: C.
$C_n H_{2 n}-2$
$C_n H_{2 n}-2$
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MCQ 111 Mark
While going in an increasing order of the length there is a rise in the molecular mass of the members by$…….$
  • A
    $14 u$
  • ✓
    $15u$
  • C
    $16 u$
  • D
    $17u$
Answer
Correct option: B.
$15u$
$15u$
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MCQ 121 Mark
From the following hydrocarbon $…………$is the cyclic hydrocarbon.
  • A
    isobutane
  • B
    propyne
  • ✓
    benzene
  • D
    isobutylene
Answer
Correct option: C.
benzene
benzene
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MCQ 131 Mark
The phenomenon in which compounds having different structural formulae have the same molecular formula is called $…………$
  • ✓
    structural isomerism
  • B
    catenation
  • C
    homologous
  • D
    functional group
Answer
Correct option: A.
structural isomerism
structural isomerism
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MCQ 141 Mark
The unsaturated hydrocarbons whose structures contain a carbon$-$carbon triple bond are called $……..$
  • A
    Alkenes
  • B
    Alkanes
  • ✓
    Alkynes
  • D
    Alcohol
Answer
Correct option: C.
Alkynes
Alkynes
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MCQ 151 Mark
The unsaturated hydrocarbons containing a carbon$-$carbon double bond are called$…....$
  • ✓
    Alkenes
  • B
    Alkanes
  • C
    Alkynes
  • D
    Alcohol
Answer
Correct option: A.
Alkenes
Alkenes
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MCQ 161 Mark
The molecule mass of a carbon compound is spread over a range of $…..$
  • ✓
    $10^{12}$
  • B
    $10^{14}$
  • C
    $10^{10}$
  • D
    $10^{13}$
Answer
Correct option: A.
$10^{12}$
$10^{12}$
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MCQ 171 Mark
The bond between two oxygen atoms is $…………$bond .
  • ✓
    double
  • B
    triple
  • C
    single
  • D
    none of these
Answer
Correct option: A.
double
double
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MCQ 191 Mark
Generally the melting and boiling point of carbon compounds are found to be less than $……...^\circ \mathrm{c}$
  • ✓
    $300$
  • B
    $100$
  • C
    $200$
  • D
    $150$
Answer
Correct option: A.
$300$
$300$
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MCQ 201 Mark
The minerals from which the metal can be separated economically are called $………$
  • A
    minerals
  • ✓
    ores
  • C
    gangue
  • D
    alloy
Answer
Correct option: B.
ores
ores
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MCQ 211 Mark
When one of the metals in an alloy is mercury the alloy is called$………..$
  • ✓
    amalgam
  • B
    sodium amalgam
  • C
    zinc amalgam
  • D
    all the above
Answer
Correct option: A.
amalgam
amalgam
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MCQ 231 Mark
$……….$ forms a green colour in the water.
  • A
    $\mathrm{CuSO}_4$
  • ✓
    $\mathrm{FeSO}_4$
  • C
    $\mathrm{NaCl}$
  • D
    all the above
Answer
Correct option: B.
$\mathrm{FeSO}_4$
$\mathrm{FeSO}_4$
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MCQ 251 Mark
$………..$is a good conductor of heat but a bad conductor of electricity.
  • ✓
    graphite
  • B
    diamond
  • C
    coal
  • D
    iodine
Answer
Correct option: A.
graphite
graphite
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MCQ 261 Mark
Ionic compounds are electrically $………$
  • A
    positively charged
  • B
    negatively charged
  • ✓
    neutral
  • D
    conductor
Answer
Correct option: C.
neutral
neutral
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MCQ 271 Mark
$…………$ exist in a liquid state at room temperature.
  • A
    Chlorine
  • ✓
    Bromine
  • C
    Iodine
  • D
    Fluorine
Answer
Correct option: B.
Bromine
Bromine
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MCQ 281 Mark
The sound of one metal colliding with another makes a noise, this property is called as $……………$
  • A
    good conductors
  • B
    ductility
  • ✓
    sonority
  • D
    malleability
Answer
Correct option: C.
sonority
sonority
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MCQ 291 Mark
In preparation of Aqua regia hydrochloric acid and$………….$acid are mixed.
  • A
    sulphuric acid
  • ✓
    nitric acid
  • C
    carbonic acid
  • D
    phosphoric acid
Answer
Correct option: B.
nitric acid
nitric acid
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MCQ 301 Mark
To prevent corrosion of iron and steel $…….$ method is used .
  • A
    electroplating
  • B
    anodization
  • C
    tinning
  • ✓
    galvanising
Answer
Correct option: D.
galvanising
galvanising
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MCQ 311 Mark
Corrosion of silver causes a black layer of $…………$
  • A
    Silver nitrate
  • B
    silver oxide
  • ✓
    silver sulphide
  • D
    silver carbonate
Answer
Correct option: C.
silver sulphide
silver sulphide
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MCQ 321 Mark
Extraction of moderately reactive elements is done by $……$ and $……..$ method.
  • A
    roasting and calcination
  • ✓
    roasting and reduction
  • C
    separation and calcination
  • D
    none of these
Answer
Correct option: B.
roasting and reduction
roasting and reduction
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MCQ 331 Mark
The chemical formula of zinc blend is$…..$
  • A
    $\mathrm{ZnSO}_4$
  • ✓
    $\ce{ZnS}$
  • C
    $\mathrm{ZnCO}_3$
  • D
    $\text{ZnO}$
Answer
Correct option: B.
$\ce{ZnS}$
$\ce{ZnS}$
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MCQ 341 Mark
Atomic number of aluminium is $....…$ and its electronic configuration is$………$
  • ✓
    $13, ( 2, 8, 3)$
  • B
    $12 ( 2, 8, 2)$
  • C
    $13, (3, 10)$
  • D
    $12, (2, 10)$
Answer
Correct option: A.
$13, ( 2, 8, 3)$
$13, ( 2, 8, 3)$
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MCQ 351 Mark
Aluminium oxide is $……….$oxide
  • A
    acidic
  • B
    basic
  • C
    neutral
  • ✓
    amphoteric
Answer
Correct option: D.
amphoteric
amphoteric
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MCQ 361 Mark
In Wilfley table method to separate particles of gangue$……….$method is used.
  • A
    Magnetic
  • B
    Froth floatation
  • C
    Leaching
  • ✓
    gravitation
Answer
Correct option: D.
gravitation
gravitation
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MCQ 371 Mark
Which of the following method is used to prevent the accumulation of greenish layer on brass due to corrosion
  • A
    electroplating
  • B
    anodization
  • ✓
    tinning
  • D
    alloying
Answer
Correct option: C.
tinning
tinning
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MCQ 381 Mark
If $\ce{Cu, Fe, Zn, Al}$ elements are arranged in increasing order of their reactivity. Then the correct order would be which of the following?
  • ✓
    $\ce{Cu, Fe, Zn, Al}$
  • B
    $\ce{Al, Cu, Fe, Zn}$
  • C
    $\ce{Zn, Al, Cu, Fe}$
  • D
    $\ce{Fe, Zn, Al, Cu}$
Answer
Correct option: A.
$\ce{Cu, Fe, Zn, Al}$
$\ce{Cu, Fe, Zn, Al}$
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MCQ 391 Mark
Iron is$…….$
  • A
    more reactive than zinc
  • B
    more reactive than aluminium
  • C
    less reactive than copper
  • ✓
    less reactive than aluminium
Answer
Correct option: D.
less reactive than aluminium
less reactive than aluminium
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MCQ 401 Mark
In electrolytic reduction of alumina $…………$ is used as a cathode.
  • A
    Sulphur
  • B
    graphite
  • C
    platinum
  • ✓
    aluminium
Answer
Correct option: D.
aluminium
aluminium
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MCQ 411 Mark
$……….$is basic oxide .
  • A
    $\mathrm{CO}_2$
  • ✓
    $\mathrm{K}_2 \mathrm{O}$
  • C
    $\mathrm{SO}_2$
  • D
    $\mathrm{Al}_2 \mathrm{O}_3$
Answer
Correct option: B.
$\mathrm{K}_2 \mathrm{O}$
$\mathrm{K}_2 \mathrm{O}$
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MCQ 421 Mark
$………..$is an alloy made from iron, nickel and chromium.
  • A
    brass
  • B
    bronze
  • ✓
    stainless steel
  • D
    amalgam
Answer
Correct option: C.
stainless steel
stainless steel
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MCQ 431 Mark
Bronze is an alloy of$…….$
  • ✓
    copper and tin
  • B
    copper and zinc
  • C
    copper and iron
  • D
    iron and nickel
Answer
Correct option: A.
copper and tin
copper and tin
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MCQ 441 Mark
$…………$ is a combination of two convex lenses with a small focal length.
  • A
    simple microscope
  • ✓
    compound microscope
  • C
    telescope
  • D
    none of these
Answer
Correct option: B.
compound microscope
compound microscope
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MCQ 451 Mark
$…….$ times larger images can be obtained by using a simple microscope.
  • ✓
    $5$
  • B
    $10$
  • C
    $20$
  • D
    $60$
Answer
Correct option: A.
$5$
$5$
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MCQ 461 Mark
Bifocal lens is required to correct $……………$defect.
  • A
    myopia
  • B
    hypermetropia
  • ✓
    presbyopia
  • D
    none of these
Answer
Correct option: C.
presbyopia
presbyopia
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MCQ 471 Mark
In hypermetropia the human eye $………...$
  • ✓
    can see distant objects clearly
  • B
    can see nearby objects distinctly
  • C
    cannot see nearby as well as distant objects clearly
  • D
    can’t see nearby as well as distant objects clearly
Answer
Correct option: A.
can see distant objects clearly
can see distant objects clearly
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MCQ 481 Mark
Due to elongation of$………….$and increase in curvature of the eye lens, a person cannot see distant objects clearly.
  • ✓
    eyeball
  • B
    pupil
  • C
    eyelid
  • D
    cornea
Answer
Correct option: A.
eyeball
eyeball
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MCQ 491 Mark
In Myopia the human eye$…...$
  • A
    cannot see nearby objects distinctly
  • ✓
    cannot see distant objects clearly
  • C
    cannot see nearby as well as distant objects clearly
  • D
    can see nearby as well as distant objects clearly
Answer
Correct option: B.
cannot see distant objects clearly
cannot see distant objects clearly
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MCQ 501 Mark
For a specific glass lens $f=0.5.$ This is the only Information given to the student. Which type of lens is given to him and what is its power?
  • A
    power $2D$ ; convex lens
  • B
    power $1D$ ; concave lens
  • ✓
    power $-0.5$ ; concave lens
  • D
    power $-0.25 D$ ; convex lens
Answer
Correct option: C.
power $-0.5$ ; concave lens
power $-0.5$ ; concave lens
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MCQ 511 Mark
In a relaxed state, the focal length of healthy eyes is $……..$
  • A
    $2\ cm$
  • B
    $2.5\ cm$
  • ✓
    $25\ cm$
  • D
    $5\ cm$
Answer
Correct option: C.
$25\ cm$
$25\ cm$
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MCQ 521 Mark
The image formed by $…….$ lens is always virtual and small.
  • A
    plane convex
  • B
    biconvex
  • ✓
    biconcave
  • D
    bifocal
Answer
Correct option: C.
biconcave
biconcave
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MCQ 531 Mark
For a normal human eye the near point is at$………$
  • A
    $2.1\ cm$
  • B
    $2.5\ cm$
  • ✓
    $25\ cm$
  • D
    $5\ cm$
Answer
Correct option: C.
$25\ cm$
$25\ cm$
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MCQ 541 Mark
A small hole of changing diameter at the centre if Iris is called $……..$
  • A
    optic nerves
  • B
    cornea
  • C
    optic disc
  • ✓
    pupil
Answer
Correct option: D.
pupil
pupil
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MCQ 551 Mark
All distances parallel to the principal axis are measured from the$……$
  • ✓
    optical centre
  • B
    centre of curvature
  • C
    principal focus
  • D
    infinity
Answer
Correct option: A.
optical centre
optical centre
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MCQ 561 Mark
In the convex lens if an object is placed at $2F1,$ the image is formed at$………$
  • A
    $F1$
  • ✓
    $2F1$
  • C
    beyond $2F1$
  • D
    On the same side of the lens as the object
Answer
Correct option: B.
$2F1$
beyond $2F1$
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MCQ 571 Mark
Virtual image is formed if an object is placed $………$
  • A
    at infinity
  • B
    at $2F1$
  • C
    at focus $F1$
  • ✓
    between $F1$ and $O$
Answer
Correct option: D.
between $F1$ and $O$
between $F1$ and $O$
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MCQ 581 Mark
The point inside the lens on the principal axis through which light rays pass without changing their path is called $…………$
  • A
    Centre of curvature
  • ✓
    optical Centre
  • C
    principal focus
  • D
    axiom point
Answer
Correct option: B.
optical Centre
optical Centre
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MCQ 591 Mark
A ray of light gets refracted $…………$ while entering the lens.
  • A
    once
  • ✓
    twice
  • C
    thrice
  • D
    doesn’t happen
Answer
Correct option: B.
twice
twice
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MCQ 601 Mark
Light changes its direction when going from one transparent medium to another transparent medium. This is called $…………$
  • A
    reflection of light
  • ✓
    refraction of light
  • C
    dispersion of light
  • D
    absorption of light
Answer
Correct option: B.
refraction of light
refraction of light
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MCQ 611 Mark
The process of separation of light into its component colours while passing through a medium is called $…………$
  • A
    reflection of light
  • ✓
    refraction of light
  • C
    dispersion of light
  • D
    absorption of light
Answer
Correct option: B.
refraction of light
refraction of light
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MCQ 621 Mark
If the refractive index of air with respect to glass is $2/3 $.What is the refractive index of glass with respect to air ?
  • A
    $2 / 3$
  • ✓
    $3 / 2$
  • C
    $1 / 3$
  • D
    $1 / 2$
Answer
Correct option: B.
$3 / 2$
$3/2$
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MCQ 631 Mark
Lights of different colours are used as signals for safety transport. From these the wavelength of red light is $………nm.$
  • A
    $400$
  • B
    $500$
  • C
    $600$
  • ✓
    $700$
Answer
Correct option: D.
$700$
$700$
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MCQ 641 Mark
$n =……………$ this law is also called Snell's Law.
  • ✓
    $\frac{\sin r}{\sin i}$
  • B
    $\frac{\sin r}{\sin e}$
  • C
    $\frac{\sin e}{\sin r}$
  • D
    $\frac{\sin i}{\sin r}$
Answer
Correct option: A.
$\frac{\sin r}{\sin i}$
$\frac{\sin r}{\sin i}$
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MCQ 651 Mark
$…………$this is the unit of refractive index.
  • A
    $cm$
  • B
    $m$
  • C
    degree
  • ✓
    refractive index has no unit
Answer
Correct option: D.
refractive index has no unit
refractive index has no unit
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MCQ 661 Mark
We see the sun even after it goes below the horizon, because$…..$
  • ✓
    refraction of light
  • B
    dispersion of light
  • C
    partial reflection of light
  • D
    reflection of light
Answer
Correct option: A.
refraction of light
refraction of light
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MCQ 671 Mark
A ray of light strikes the glass slab at an angle $400$ with the surface of the slab. Then the angle of incidence will be$……….$
  • A
    $50$
  • ✓
    $40$
  • C
    $60$
  • D
    $90$
Answer
Correct option: B.
$40$
$40$
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MCQ 681 Mark
In the following diagram if $\angle \mathrm{i}=40^{\circ}$, then $\angle \mathrm{e}=\ldots{ }^{\circ}$ ?Image
  • A
    $50$
  • ✓
    $40$
  • C
    $60$
  • D
    $90$
Answer
Correct option: B.
$40$
$40$
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MCQ 691 Mark
Due to $………...$ pencil looks bent in water in the given experiment.
Image
  • ✓
    refraction of light
  • B
    dispersion of light
  • C
    internal reflection of light
  • D
    reflection of light
Answer
Correct option: A.
refraction of light
refraction of light
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MCQ 701 Mark
$…………$ heat is necessary to raise $1 \ Kg$ of water from $14.5^{\circ} \mathrm{C}$ to $15.5^{\circ} \mathrm{C}$
  • A
    $4180$ Joule
  • B
    $1$ kJoule
  • C
    calorie
  • ✓
    $4180$ calories
Answer
Correct option: D.
$4180$ calories
$4180$ calories
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MCQ 711 Mark
$…………$ apparatus is used to study the anomalous behaviour of water.
  • A
    calorimeter
  • B
    Joule’s apparatus
  • ✓
    Hope’s apparatus
  • D
    Thermos flask
Answer
Correct option: C.
Hope’s apparatus
Hope’s apparatus
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MCQ 721 Mark
The $SI$ unit of specific heat is $………$
  • A
    Kcal
  • B
    Cal
  • C
    $\mathrm{Cal} / \mathrm{g}^0 \mathrm{c}$
  • ✓
    $\mathrm{J} / \mathrm{Kg}^0 \mathrm{c}$
Answer
Correct option: D.
$\mathrm{J} / \mathrm{Kg}^0 \mathrm{c}$
$\mathrm{J} / \mathrm{Kg}^0 \mathrm{c}$
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MCQ 731 Mark
Ice$-$ball is prepared from shredded ice again. This is the example of $……$
  • A
    melting
  • B
    condensation
  • ✓
    regelation
  • D
    freezing
Answer
Correct option: C.
regelation
regelation
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MCQ 741 Mark
From the options given below the specific heat of$…………$is maximum.
  • A
    copper
  • B
    silver
  • C
    iron
  • ✓
    mercury
Answer
Correct option: D.
mercury
mercury
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MCQ 751 Mark
In a region with a cold climate the aquatic animals can survive at $4^{\circ} \mathrm{C}$, because$……..$
  • A
    Ice floating on water is insulator
  • B
    the heat from water cannot transfer to the atmosphere
  • ✓
    anomalous behaviour of water
  • D
    all the above
Answer
Correct option: C.
anomalous behaviour of water
anomalous behaviour of water
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MCQ 761 Mark
When the temperature of water decreases below $4^{\circ} \mathrm{C}$ because$……..$
  • A
    decreases
  • ✓
    increases
  • C
    remains same
  • D
    none of these
Answer
Correct option: B.
increases
increases
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MCQ 771 Mark
Vapours in air condenses to form$…….$
  • ✓
    fog
  • B
    snowfall
  • C
    rainfall
  • D
    $b$ and $c$
Answer
Correct option: A.
fog
fog
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MCQ 781 Mark
Humid and dry nature of air depends on the$………$
  • ✓
    amount of vapour in the air
  • B
    amount of vapour to make the air saturated
  • C
    temperature of the air
  • D
    volume of the air
Answer
Correct option: A.
amount of vapour in the air
amount of vapour in the air
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MCQ 791 Mark
The vapour content in the air is measured by $……….$
  • A
    relative humidity
  • B
    dew point
  • ✓
    absolute humidity
  • D
    none of these
Answer
Correct option: C.
absolute humidity
absolute humidity
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MCQ 801 Mark
If pressure increases the melting point of a substance $……….$
  • A
    does not change
  • B
    decreases
  • ✓
    increases
  • D
    remains constant
Answer
Correct option: C.
increases
increases
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MCQ 811 Mark
Which of the following substances contracts on heating?
  • A
    Lukewarm water
  • ✓
    Ice
  • C
    Iron
  • D
    Mercury
Answer
Correct option: B.
Ice
Ice
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MCQ 821 Mark
The unit of intensity of the magnetic field is $………….$
  • A
    Volt
  • B
    Faraday
  • C
    Newton
  • ✓
    Oersted
Answer
Correct option: D.
Oersted
Oersted
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MCQ 831 Mark
Which of the following scientists invented the rule of electromagnetic induction?
  • A
    Newton
  • B
    Kepler
  • C
    Mendeleev
  • ✓
    Michael Faraday
Answer
Correct option: D.
Michael Faraday
self
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MCQ 841 Mark
$……….$is used for electrical measurements.
  • A
    Thermometer
  • B
    Galvanometer
  • ✓
    Voltmeter
  • D
    Electric meter
Answer
Correct option: C.
Voltmeter
Voltmeter
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MCQ 851 Mark
The right-hand thumb rule is also called ……………. rule.
  • A
    Newton’s law of motion
  • B
    Newland’s law of Octave
  • C
    Mendeleev’s periodic law
  • ✓
    Maxwell’s cork$-$screw
Answer
Correct option: D.
Maxwell’s cork$-$screw
Maxwell’s cork$-$screw
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MCQ 861 Mark
A coil of an alloy$……...$is used in an electric heater cooker as a resistor.
  • A
    Stainless steel
  • ✓
    Nichrome
  • C
    Copper
  • D
    Bronze
Answer
Correct option: B.
Nichrome
Nichrome
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MCQ 871 Mark
These days when current in the circuit suddenly increases$……...$switches are used.
  • A
    $\text{MCA}$
  • B
    $\text{MCC}$
  • C
    $\text{MCD}$
  • ✓
    $\text{MCB}$
Answer
Correct option: D.
$\text{MCB}$
$\text{MCB}$
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MCQ 881 Mark
The frequency of $AC$ is $…………. Hz$
  • A
    $20Hz$
  • ✓
    $50Hz$
  • C
    $25Hz$
  • D
    $75Hz$
Answer
Correct option: B.
$50Hz$
$50Hz$
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MCQ 891 Mark
The electricity bill specifies the usage in $………...$
  • A
    kilowatt
  • B
    Joule
  • C
    Volt
  • ✓
    Unit
Answer
Correct option: D.
Unit
Unit
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MCQ 901 Mark
In an electric bulb coil of $…………$ metal is used.
  • A
    copper
  • ✓
    tungsten
  • C
    aluminium
  • D
    iron
Answer
Correct option: B.
tungsten
tungsten
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MCQ 911 Mark
The ‘live’ and the ‘neutral’ wires have potential differences of $……$
  • A
    $110V$
  • B
    $202V$
  • C
    $201V$
  • ✓
    $220V$
Answer
Correct option: D.
$220V$
$220V$
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MCQ 931 Mark
Aqueous solution of $\ce{ZnSO_4}$ is added into the aqueous solution of $\ce{BaCl_2}$ , this is the example of $......$ reaction.
  • A
    displacement
  • ✓
    double displacement
  • C
    redox
  • D
    reduction
Answer
Correct option: B.
double displacement
double displacement
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MCQ 941 Mark
In the chemical equation the $…………$are written on the left$-$hand side.
  • A
    products
  • ✓
    reactants
  • C
    element
  • D
    catalyst
Answer
Correct option: B.
reactants
reactants
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MCQ 951 Mark
The chemical reaction in which two or more products are formed from a single reactant is called $…………...$reaction.
  • ✓
    decomposition
  • B
    combination
  • C
    displacement
  • D
    double displacement
Answer
Correct option: A.
decomposition
decomposition
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MCQ 961 Mark
When the positive charge on an ion increases or the negative charge on them decreases it is called as$…………...$
  • A
    reduction
  • B
    corrosion
  • ✓
    oxidation
  • D
    decomposition
Answer
Correct option: C.
oxidation
oxidation
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MCQ 971 Mark
Writing a chemical reaction in brief by using chemical formulae is called as…….
  • A
    chemical change
  • B
    chemical symbol
  • ✓
    chemical equation
  • D
    chemical reaction
Answer
Correct option: C.
chemical equation
Self
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MCQ 981 Mark
The elements from the zero group are called$…...$
  • A
    alkali metals
  • B
    alkaline earth metals
  • C
    halogen
  • ✓
    noble gases
Answer
Correct option: D.
noble gases
noble gases
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MCQ 991 Mark
The tendency of an element to form anion is the $...............$ character of that element.
  • ✓
    nonmetallic
  • B
    basic
  • C
    metallic
  • D
    acidic
Answer
Correct option: A.
nonmetallic
nonmetallic
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MCQ 1001 Mark
While going from top to bottom in a group the atomic radius$………$
  • ✓
    increases
  • B
    decreases
  • C
    remains same
  • D
    No change occurs
Answer
Correct option: A.
increases
increases
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MCQ 1011 Mark
………… is in liquid form in the halogen family
  • A
    Fluorine
  • B
    Chlorine
  • ✓
    Bromine
  • D
    Iodine
Answer
Correct option: C.
Bromine
Bromine
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MCQ 1021 Mark
The tendency of an element to form cation is the ………. character of that element.
  • A
    nonmetallic
  • B
    basic
  • ✓
    metallic
  • D
    acidic
Answer
Correct option: C.
metallic
Self
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MCQ 1031 Mark
Atomic radius is expressed in the unit $…...$
  • A
    nanometer
  • ✓
    picometer
  • C
    micrometer
  • D
    millimeter
Answer
Correct option: B.
picometer
picometer
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MCQ 1041 Mark
$……..$ is the distance between the nucleus of the atom and its outermost shell.
  • ✓
    atomic radius
  • B
    Atomic diameter
  • C
    atomic mass
  • D
    atomic size
Answer
Correct option: A.
atomic radius
Atomic radius
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MCQ 1051 Mark
The size of an atom is indicated by its$…….$
  • A
    atomic number
  • ✓
    radius
  • C
    number of shells
  • D
    atomic mass
Answer
Correct option: B.
radius
radius
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MCQ 1061 Mark
The $d-$block elements are called as$………$elements
  • ✓
    Transition
  • B
    Metalloid
  • C
    Normal
  • D
    Iner transition
Answer
Correct option: A.
Transition
Transition
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MCQ 1071 Mark
Which of the following statements about the Modern periodic table is correct?
  • A
    $18$ horizontal rows are known as Periods.
  • B
    $7$ vertical columns are known as Periods
  • C
    $18$ vertical columns are known as groups.
  • ✓
    $7$ horizontal rows are known as Periods.
Answer
Correct option: D.
$7$ horizontal rows are known as Periods.
$7$ horizontal rows are known as Periods.
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MCQ 1081 Mark
On moving from left to right in a periodic table, the size of the atom$…….$
  • A
    increases
  • ✓
    decreases
  • C
    decreases first and then increases
  • D
    does not change
Answer
Correct option: B.
decreases
decreases
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MCQ 1091 Mark
Which one of the following does not increase while moving down the group of the Modern periodic table
  • A
    Atomic radius
  • B
    Metallic character
  • ✓
    Valency
  • D
    Number of shells
Answer
Correct option: C.
Valency
Valency
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MCQ 1101 Mark
Arrange the following elements in order of their decreasing metallic character. $\text{Na, Si, Cl, Mg, Al}$
  • A
    $\mathrm{Cl}>\mathrm{Si}>\mathrm{Al}>\mathrm{Mg}>\mathrm{Na}$
  • ✓
    $\mathrm{Na}>\mathrm{Mg}>\mathrm{Al}>\mathrm{Si}>\mathrm{Cl}$
  • C
    $\mathrm{Na}>\mathrm{Al}>\mathrm{Mg}>\mathrm{Cl}>\mathrm{Si}$
  • D
    $\mathrm{Al}>\mathrm{Na}>\mathrm{Si}>\mathrm{Ca}>\mathrm{Mg}$
Answer
Correct option: B.
$\mathrm{Na}>\mathrm{Mg}>\mathrm{Al}>\mathrm{Si}>\mathrm{Cl}$
$\mathrm{Na}>\mathrm{Mg}>\mathrm{Al}>\mathrm{Si}>\mathrm{Cl}$
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MCQ 1121 Mark
Which among the following elements would lose an electron easily?
  • A
    $Mg$
  • ✓
    $Na$
  • C
    $AL$
  • D
    $CL$
Answer
Correct option: B.
$Na$
$Na$
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MCQ 1131 Mark
Which pair of atomic numbers represents elements in the same group?
  • ✓
    $11,19$
  • B
    $6,12$
  • C
    $4,16$
  • D
    $8,17$
Answer
Correct option: A.
$11,19$
$11,19$
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MCQ 1151 Mark
$…….$is the outermost shell for elements of period $2.$
  • A
    $K$
  • ✓
    $L$
  • C
    $M$
  • D
    $N$
Answer
Correct option: B.
$L$
$L$
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MCQ 1161 Mark
In the Modern Periodic Table the number of columns and periods are respectively $…….$and $…….$
  • A
    $16,7$
  • B
    $6,16$
  • ✓
    $18,7$
  • D
    $18,6$
Answer
Correct option: C.
$18,7$
$18,7$
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MCQ 1171 Mark
In Mendeleev’s periodic table eka$-$silicon was later named as$……..$
  • A
    Scandium
  • B
    Gallium
  • ✓
    Germanium
  • D
    Thorium
Answer
Correct option: C.
Germanium
Germanium
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MCQ 1181 Mark
At the time of Mendeleev $…......$ elements were known.
  • A
    $56$
  • ✓
    $65$
  • C
    $63$
  • D
    $118$
Answer
Correct option: B.
$65$
$65$
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MCQ 1191 Mark
$X$ and $Y$ are two elements having similar properties which obey Newlands’s Law of Octaves.The minimum and maximum number of elements in between $X$ and $Y$ respectively are$……$
  • ✓
    $6$ and $8$
  • B
    $7$ and $15$
  • C
    $8$ and $14$
  • D
    $6$ and $13$
Answer
Correct option: A.
$6$ and $8$
$6$ and $8$
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MCQ 1201 Mark
Newlands’ Law of Octaves is applicable up to $….$
  • A
    oxygen
  • ✓
    calcium
  • C
    cobalt
  • D
    potassium
Answer
Correct option: B.
calcium
calcium
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MCQ 1211 Mark
Dobereiner presents the rule of $.........$
  • A
    periodic
  • B
    modern periodic
  • ✓
    triads
  • D
    octaves
Answer
Correct option: C.
triads
triads
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MCQ 1221 Mark
Laws of planetary motion were discovered by $………$
  • A
    Sir Isaac Newton
  • B
    Tycho Brahe
  • ✓
    Johannes Kepler
  • D
    Henry Cavendish
Answer
Correct option: C.
Johannes Kepler
Johannes Kepler
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MCQ 1231 Mark
Newton presented the laws of motion, equations of motion and theory of gravitation in his book$………$
  • A
    Origin of Species
  • ✓
    Principia
  • C
    Calculus
  • D
    Gravity
Answer
Correct option: B.
Principia
Principia
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MCQ 1241 Mark
A person weighs $60N$ on earth. His weight on the moon will be$……$
  • A
    $360 N$
  • B
    $60 N$
  • C
    $6 N$
  • ✓
    $10 N$
Answer
Correct option: D.
$10 N$
$10 N$
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MCQ 1251 Mark
The weight of any object on the moon is nearly $…………$of the weight of the earth.
  • ✓
    $1 / 6$
  • B
    $1 / 8$
  • C
    $1 / 2$
  • D
    $2 / 6$
Answer
Correct option: A.
$1 / 6$
$1 / 6$
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MCQ 1261 Mark
The free fall of an object is possible only in$…….$
  • A
    air
  • ✓
    vacuum
  • C
    on the surface of earth
  • D
    None of these
Answer
Correct option: B.
vacuum
vacuum
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MCQ 1271 Mark
The value of gravitational acceleration$(g)$ is$…………$at the equator
  • ✓
    $9.78 \mathrm{~m} / \mathrm{s}^2$
  • B
    $9.832 \mathrm{~m} / \mathrm{s}^2$
  • C
    $9.8 \mathrm{~m} / \mathrm{s}^2$
  • D
    $6.67 \mathrm{~m} / \mathrm{s}^2$
Answer
Correct option: A.
$9.78 \mathrm{~m} / \mathrm{s}^2$
$9.78 \mathrm{~m} / \mathrm{s}^2$
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MCQ 1281 Mark
The value of gravitational acceleration $(\mathrm{g})$ is
  • ✓
    highest at the poles
  • B
    highest at the equator
  • C
    same everywhere on the surface of the earth
  • D
    lowest at the poles
Answer
Correct option: A.
highest at the poles
highest at the poles
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MCQ 1291 Mark
The $……….$ force is much weaker than other forces in nature.
  • ✓
    gravitational
  • B
    electromagnetic
  • C
    nuclear force
  • D
    intermolecular
Answer
Correct option: A.
gravitational
gravitational
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MCQ 1301 Mark
The value of the universal gravitational constant $(G)$ in $SI$ unit is.
  • ✓
    $6.673 \times 10^{-11} \mathrm{Nm}^2 / \mathrm{kg}^2$
  • B
    $6.673 \times 10^{11} \mathrm{Nm} / \mathrm{kg}$
  • C
    $9.673 \times 10^{-11} \mathrm{Nm} / \mathrm{kg}$
  • D
    $9.673 \times 10^{-11} \mathrm{Nm}^2 / \mathrm{kg}^2$
Answer
Correct option: A.
$6.673 \times 10^{-11} \mathrm{Nm}^2 / \mathrm{kg}^2$
$6.673 \times 10^{-11} \mathrm{Nm}^2 / \mathrm{kg}^2$
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MCQ 1311 Mark
The gravitational force between two bodies is directly proportional to the product of the masses of those bodies and is $……….$ of the distance between them.
  • ✓
    inversely proportional to the square
  • B
    directly proportional to the square
  • C
    inversely proportional to the cube
  • D
    inversely proportional to the square root
Answer
Correct option: A.
inversely proportional to the square
inversely proportional to the square
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MCQ 1321 Mark
The square of its period of revolution around the sun is directly proportional to the $……….$ of the mean distance of a planet from the sun.
  • A
    square
  • B
    square root
  • ✓
    cube
  • D
    cube root
Answer
Correct option: C.
cube
cube
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MCQ 1331 Mark
The orbit of a planet revolving around a star is $……$
  • A
    circular
  • B
    linear
  • C
    towards the focal point
  • ✓
    elliptical
Answer
Correct option: D.
elliptical
elliptical
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MCQ 1341 Mark
A $…….$ Is necessary to change the speed as well as the direction of motion of an object.
  • ✓
    force
  • B
    inertia
  • C
    momentum
  • D
    motion
Answer
Correct option: A.
force
force
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