MHT - CET MCQ

In an npn transistor, the collector current is 24 mA. If 80% of electrons reach collector, its base current in mA is ______.

The diagram shows the path of four `alpha` - particles of the same energy being scattered by the nucleus of an atom simultaneously. Which of these are/is not physically possible?

The radius of electron's second stationary orbit in Bohr's atom is R. The radius of the third orbit will be ______

A metal surface is illuminated by photons of energy 5 eV and 2.5 eV respectively. The ratio of their wavelengths is ____________.

In a purely capacitive circuit, the e.m.f. ____________.

A hot wire ammeter reads 20 A in AC. circuit. The peak value of the current is ______

Two coils P and Q are kept near each other. When no current flows through coil P and current increases in coil Q at the rate 10 A/s, the e.m.f. in coil P is 20 mV. When coil Q carries no current and current of 1.6 A flows through coil P, the magnetic flux linked with the coil Q is ____________.

A conducting square loop of side l and resistance R moves in its plane with a uniform velocity v perpendicular to one of its side. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere. The current induced in the loop is ______.

The magnetic susceptibility is given by ______

If in a moving coil galvanometer, a current I produces a deflection `theta,` then ____________.

A charged particle is released from rest in a region of steady and uniform electric and magnetic fields which are parallel to each other. The particle will move in a ____________.

Voltmeter reading upto 150 volts having resistance of 300 `Omega` can be converted into an ammeter of 8 A range by connecting ____________.

In the metre bridge experiment shown in the figure, the balance length AC corresponding to null deflection of the galvanometer is x. What would be the balance length if the radius of the wire AB is doubled?

Two metal plates are separated by 2 cm. The potentials of the plates are -10 V and + 30 V. The electric field between the two plates is ______.

A capacitor of capacitance C charged by an amount Q is connected in parallel with an uncharged capacitor of capacitance 2C. The final charges on the capacitors are ____________.

A 10 µF capacitor is fully charged across a 15 V battery. It is then disconnected from the battery and connected to an uncharged capacitor. If the voltage across the capacitor becomes 5 V then the capacitance of the uncharged capacitor will be ____________.

In a single slit diffraction pattern, which of the following is incorrect for fringe pattern?

In a Young's experiment, two coherent sources are placed 0.60 mm apart and the fringes are observed one metre away. If it produces the second dark fringe at a distance of 1 mm from the central fringe, the wavelength of monochromatic light used would be ____________.

lf the length of a stretched string is shortened by 40 % and the tension is increased by 44%, then the ratio of the final and initial fundamental frequencies are ____________.

When a simple harmonic progressive wave is travelling through a medium, then each succeeding particle ______

The length of a simple pendulum is increased by 44%. The percentage change in its time period is ______

Two waves having the same amplitude and frequency overlap near a point. The ratio of the intensities when the two waves arrive in phase to that when they arrive 90° out of phase is ______

The equation of S.H.M. of a particle of amplitude 4 cm performing 150 oscillations per minute starting with an initial phase 30° is ____________.

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure,

The change in internal energy of the gas during the transition is ____________.

In which of the following processes, beat is neither absorbed nor released by a system?

Two samples A and B, of a gas at the same initial temperature and pressure are compressed from volume V to V/2; A isothermally and B adiabatically. The final pressure of A will be ______.

At same temperature and pressure of an ideal gas, ____________.

Choose the CORRECT statement.

Water rises to a height of 10 cm in a capillary tube and mercury falls to a depth of 3.5 cm in the same capillary tube. The density of mercury is 13.6 gm/cc and its angle of contact is 135°, also density of water is 1 gm/cc and its angle of contact is 0°, then the ratio of surface tension of the two liquid is ______.

(cos 135° = 0.7)

A soap bubble of diameter 4 mm is formed in air. The surface tension of liquid is 15 dyne/cm. The excess pressw·e inside the soap bubble is______.

If the angular momentum of an electron is `vec"J"` then the magnitude of the magnetic moment will be ____________.

In a p-type semiconductor, the acceptor impurity produces an energy level ______

Two-point charges of + 0.2 µµC and -0.2 µµC are separated by 1 o8 m. What is the value of the electric field at an axial point at a distance of 0.1 m from their mid-point?

Which of the following statements is incorrect?

The ratio of densities of nitrogen and oxygen is 14:16. The temperature at which the speed of sound in nitrogen will be the same as that in oxygen at 79°C is ______

When the kinetic energy of an electron is increased, the wavelength of the associated wave will ______.

A metre scale made of a metal reads accurately at 25 °C. Suppose in an experiment an accuracy of 0.12 mm in 1 m is required, the range of temperature in which the experiment can be performed with this metre scale is ______.(coefficient of linear expansion of the metal is `20 xx 10^-6 / (°"C")`

A geostationary satellite is orbiting the earth at the height of 6R above the surface of earth. R being radius of earth. The time period of another satellite at a height of 2.5 R from the surface of earth is ____________.

If mean radius of earth is R, its angular velocity is ro and the acceleration due to gravity at the surface of the earth is g, then the cube of the radius of the orbit of satellite will be ____________.

Which of the following position-time graph does NOT exist in nature?

Conventionally, the nanometer scale is defined as ____________.

γ-isomer of BHC is called as ____________.

Cuprammonium rayon and viscose rayon are ____________ polymers.

Stachyose is ____________.

Which of the following type of carbohydrates cannot be hydrolyzed?

In which of the following pairs, the first compound is more basic than the second compound?

Choose the CORRECT increasing order of the acidic strength of carboxylic acids from the following.

Which of the following acids does NOT contain two carboxyl groups?

Cumene is used in the commercial method for the manufacture of ____________.

Which of the following reagents are required in the conversion of phenol to salicylic acid?

Which of the following carbocation is the most stable?

Which one has the lowest boiling point?

Which would exhibit coordination isomerism?

The formula of sodium hexanitrocobaltate (III) is, ____________.

Which statement(s) is/are CORRECT about applications of lanthanoid metals/ions and their compounds?

(I) The optoelectronics applications use lanthanoid ions as active ions in luminescent materials.

(II) Lanthanoid compounds are used in television tubes.

(III) Lanthanoids are used in hybrid cars, superconductors and permanent magnets.

Which of the following is NOT a mineral of iron?

Which of the following is TRUE about chlorine trifluoride?

The molecular formula of peroxymonosulfuric acid is ____________.

The following reactions follow zero order kinetics, EXCEPT ____________.

When electrolysis of aqueous NaCl and molten NaCl are carried out separately, the product formed at anode are ___________ and ____________ respectively.

For a reversible spontaneous change, ∆S is ____________.

A compound that has a high negative heat of formation is normally ____________.

Which of the following is responsible for the solubility of lithium compounds in organic solvents?

The pH of 0.001 M HCl solution is ____________.

In calculating freezing point depression the concentration of solute is expressed in ____________.

At the boiling point of a liquid, its vapour pressure is equal to ____________.

The atoms of element 'Y' form hexagonal close packing and the atoms of element X occupies `3/4` th portion of the number of tetrahedral voids. The formula of the compound formed by X and Y is ____________.

The condensed formula of the following compound is ____________.

Which of the following is NOT true for lyophilic colloids?

At 25°C and 1 atm, a cylinder containing 10 L of an ideal gas is connected to the empty cylinder with a capacity of 20 L. The pressures exerted by gas m both the cylinders will be ____________.

When methane undergoes combustion in air, the oxidation number of C ____________.

Which of the following has a greater number of electrons than neutrons?(Mass number of Mg, C, O and Na is 24, 12, 16 and 23 respectively).

Calculate the total volume occupied by 48 g oxygen and 42 g nitrogen at STP.

All of the following are TRUE for industrial melanism, EXCEPT

In compliance with the Convention on Biological Diversity (CBD), which Act was passed in 2002?

Which among the following is an exception to invasive species?

Match the following and choose the correct alternative.

	Column I		Column II
i.	Not evaluated	a.	Pervasive and abundant after careful assessment
ii.	Near threatened	b.	Information related to risk of extinction is lacking in some way
iii.	Least concern	c.	Described by scientist but not assessed by the IUCN
iv.	Data deficient	d.	May meet the criteria for threatened status in the near future

Species richness - area relationship is given by ______.

Correlate the following.

Intraspecific diversity: Genetic diversity:: Interspecific diversity: ____________.

______ are the pioneers of ecological succession.

Identify the CORRECT statement with respect to ecological succession.

Which are the pioneer species in xerarch and hydrarch succession respectively?

____________ succession begins where no living organisms were present before.

How can the changes that take place in communities during ecological succession be classified as?

Which one of the following in NOT a mode of nutrition in fungi?

Identify the type of negative interaction.

Select the CORRECT match:

	I		II
i.	Competition	a.	Lichen
ii.	Commensalism	b.	Sea anemone and clownfish
iii.	Mutualism	c.	Lions and Leopards

Which principle/theory states that 'Two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior will be eliminated eventually.'?

Which of the following situations contributes to increase in density of population?

The type of population represented in the given age pyramid is

Every organism occupies a particular place and has a functional role in an ecosystem known as ____________.

Identify the CORRECT term for following description.

Some multinational companies have exploited the traditional knowledge of the indigenous people to produce commercially important bioproducts without their consent.

In order to eliminate dicotyledonous weeds from a monocot crop field we can use ______.

In gene therapy, ____________ can be used to treat cystic fibrosis.

Identify the techniques that can be used to transfer foreign DNA directly into the cell or protoplast without the use of plasmids.

i. Biolistic method

ii. Ultrasonification

iii. Shot gun

iv. Lipofection

v. Microinjection

vi. Electroporation

______ is a Type I restriction enzyme.

Identify the characterization techniques that are based on molecular weights of compounds.

Which of the following statements are CORRECT regarding Anabaena and Frankia?

Identify the CORRECT statement regarding Ectomycorrhizae.

After which of the following treatment BOD of the effluent is significantly reduced?

Identify the type of microorganisms involved in floe formation during sewage treatment.

Identify the diagram given below.

Which of the following is the INCORRECT statement with respect to biofortification?

From which plant is cocaine extracted?

The causative agent of malaria is a ______

Stomach cancer is characterised as ______.

Complete the analogy with respect to causative agents of diseases.

B. malayi : Filariasis :: ____________ : Ringworm

The immune system of an individual is affected directly by ______.

After infecting RBCs, merozoites develop into ____________.

Branches of which nerve innervate the parotid salivary glands?

What is the other name for forebrain?

Which part of the brain contains the corpora quadrigemina and crura?

Match the following.

	Column I		Column II
i.	oligodendrocytes	a.	Small sized, derived from monocytes and acts as macrophages
ii.	Astrocytes	b.	Production and circulation of CSF
iii.	Ependymal cells	c.	Mainly form the myelin sheath around central axon
iv.	Microglia	d.	Star shaped and most abundant glial cells of CNS

Which are the sensory cranial nerves?

Which is the ninth cranial nerve in humans?

For which of the following reason it is much easier for a small animal to run uphill than for a large animal?

______ indicates heaviness with severe chest pain which may disappear with rest.

Identify the CORRECT statement.

Which of the following correctly represents the flow of blood in closed blood vascular system?

The given diagram represents the conducting system of human heart. Identify 1, 2, 3, 4.

Which of the following is TRUE regarding Rhizobium?

Synthesis of ethylene takes place in ______

Among the following statements regarding gibberellins all are true, except

Auxin in was isolated by F.W. Went from ____________.

First cytokinin was discovered by Skoog and Miller while working on tissue culture of ____________ plant.

Formation of inter-fascicular cambium during secondary growth of plants is facilitated by ______.

Which of the following term correctly describes the membrane which allows passage of certain substances more readily than others?

Which process aids absorption of water by seeds during its germination?

Due to which ·of the following reason root cap has no function in water absorption?

______ water refers to the water that is present in the fine spaces of small non-colloidal soil particles.

____________plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.

Which of the following is NOT a property of water?

Identify the character which is most relatable to Neanderthal man?

Identify the CORRECT feature of Neanderthal man?

Which amongst the following is the earliest fossil?

Which of the features of modern man differs from apes?

Genetic drift is more significant in ______

Any random fluctuation or alteration in the allele frequency occurring in the natural population by pure chance is called ____________.

Which of the following process is carried out by restriction endonuclease used in DNA fingerprinting?

In which year the Human Genome Project was completed?

______ refers to the phenomenon by which a set of genes are switched on when there is necessity to metabolise a new substrate.

______ refers to the portion of gene which is transcribed but not translated.

____________ refers to removal of introns and joining the exons in a defined order in a transcription unit.

From the following which option correctly represents the normal genetic constitution of a ovum?

If a normal visioned woman marries a colour blind man then, ______,

The criss-cross pattern of inheritance is observed in ____________.

Deficiency of______ enzyme results in phenylketonuria.

What' does 'P' and 'Q' represent in the following diagram of X and Y chromosomes? Select the correct option representing, its appropriate description.

How is contraception achieved with intra uterine devices such as copper T and loop?

All are functions of placenta, EXCEPT ______.

How long does human pregnancy last from the start of the last menstrual cycle?

How many hours after fertilization does first cleavage occur?

How many hours are required for the process of capacitation?

Four primary spermatocytes give rise to ______.

Identify the CORRECT statements with respect to non-recurrent apomixis.

i. Plants produced by this method are generally sterile and do not reproduce sexually.

ii. In this, megaspore mother cell undergoes usual meiotic division and a haploid embryo sac is formed.

______ refers to persistent nucellus in the seed.

Identify the CORRECT statement/s from the following.

i. In post-fertilization changes within the ovule, the development of embryo is followed by the development of endosperm.

ii. Helobial endosperm is intermediate between cellular and nuclear type endosperm.

iii. Helobial endosperm is mostly observed in 72 families of dicots.

By which of the following double fertilization is exhibited?

Fill up the blanks with suitable words and select the correct option.

The ability of the pistil to recognize pollen is dependent on ____________ components and ____________ guide the entry of pollen tube. This study leads to help ____________ in getting ____________ even in ____________.

p. Chemical

q. Plant breeders

r. Hybrids

s. Incompatible pollination

t. Synergids

From the following identify the outbreeding device/s that prevent/s self-pollination.

Diuresis means ______.

The amount of heat liberated by combustion of 1 g. of food in a bomb calorimeter is called ____________.

Saliva contains all of the following, EXCEPT

How many oxygen molecules are utilized in glycolysis?

How many ATP molecules are produced by oxjdation of one molecule of acetyl-Co-A?

Following pathway. flowchart represents glycolytic pathway.

The enzymes catalyzing reactions 1, 2, and 3 respectively in the above steps are

Which of the following contains keratin?

Which of the following biomolecules is absent or found in least concentration in ribosomes?

Identify the INCORRECT statement with respect to lipids.