MHT - CET MCQ

After 1 hour, `(1/8)^"th"` of the initial mass of a certain radioactive isotope remains undecayed. The half-life of the isotopes is ______.

The radius of germanium (Ge) nuclide is measured to be twice the radius of `""^9""_4"Be"`. The number of nucleons in Ge will be ____________.

When an electron in hydrogen atom jumps from third excited state to the ground state, the de-Broglie wavelength associated with the electron becomes ____________.

Which of the following models was successful in explaining the observed hydrogen spectrum?

According to Rutherford's model of an atom, ______

An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is ( c being velocity of light) ______.

When light of wavelength '`lambda`' is incident on photosensitive surface, photons of power 'P' are emitted. The number of photons (n) emitted in 't' second is (h = Planck's constant, c = velocity of light in vacuum) ____________.

In series resonance, LCR circuit, below the resonant frequency, the circuit is ____________.

In series 'LR' circuit and in series 'RC' circuit, same current is flowing. If the frequency of e.m.f. of a.c. is increased for both the circuits, the impedance will ____________.

In a series LCR circuit R = 300 Ω, L = 0.9 H, C = 2 µF, ω = 1000 rad/s. The impedance of the circuit is ______

Magnetic flux of 12 microweber is linked with a coil. When current of 3 mA flows through it, the self inductance of the coil is ____________.

The magnetic property of magnetic substance is associated with ____________.

Magnetic dipole moment `vec"m"` of the coil, placed in uniform magnetic field of induction `vec"B"` does not depend on ____________.

A straight wire of length 50 cm carrying a current of 6 A is suspended in mid-air by a uniform magnetic field of 0.4 T (as shown in figure). The mass of the wire is ______.

(g = 10` "ms"^-2`)

A galvanometer of resistance 100 Ω is connected to a battery of 2V, with a resistance of 1900 Ω in series. The deflection obtained is 30 divisions. To reduce this deflection by 10 divisions, the additional resistance required to be connected in series is ______

To convert galvanometer into an ammeter one has to connect ____________.

A potentiometer wire of length 100 cm has a resistance of 10 `Omega.` It is connected in series with a resistance and an accumulator of e.m.f 2 V and of negligible internal resistance. A source of e.m.f 10 mV is balanced against a 40 cm length of the potentiometer wire. The value of the external resistance is ____________.

ln, a Wheatstone network, P = Q = R = 8 `Omega` and S is 10 `Omega`. The required resistance to be connected to S so that network is balanced is ______.

A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 4 m away. The distance between the first dark fringes on either side of the central bright fringe is ______.

The graph shows the variation of fringe width (β) versus distance of the screen from the plane of the slits (D) in Young's double-slit experiment Keeping other parameters the same. The wavelength of light used can be calculated as d = distance between the slits ______ 

For a radiation of 9 GHz passing through air. The number of waves passing through 1 m length is ____________.

In melde's experiment, when the tension decreases by 0.009 kg-wt, the number of loops changes from 4 to 5. The initial tension is ______.

The amplitude of a wave represented by equation `"y" = 1/(sqrt"a") "sin" omega"t" pm 1/(sqrt"b") "cos" omega"t"` will be ____________.

An `alpha` - particle of energy 5 MeV is scattered through 180° by gold nucleus. The distance of closest approach is of the order of ______.

If the length of an oscillating simple pendulum is made `1/3` times at a place keeping amplitude the same, then its total energy (E) will be ______

The pointer reading v/s load graph for a spring balance is as given in the figure. The spring constant is ______. 

Given that 'p' joule of heat is incident on a body and out of it 'q' joule is reflected and transmitted by it. The absorption coefficient of the body is ____________.

The average K.E. of hydrogen molecules at 27° C is E. The average K.E. at 627° C is ____________.

A metal coin of thickness 'd' and density 'ρ' is floating on water of surface tension 'T'. The radius of the coin is ______.

g = acceleration due to gravity

When a mercury drop of radius 'R', breaks into 'n' droplets of equal size, the radius 'r' of each droplet is ______.

A motorcyclist rides in a horizontal circle about central vertical axis inside a cylindrical chamber of radius 'r'. If the coefficient of friction between the tyres and the inner surface of chamber is 'µ', the minimum speed of motorcyclist to prevent him from skidding is ______.

('g' =acceleration due to gravity)

In insulators, ____________.

A point object is placed at a distance of 25 cm from a convex mirror of focal length 25 cm. The image will form at ____________.

Assertion: The change in air pressure affects the speed of sound.

Reason: The speed of sound in gases is proportional to the square of pressure.

In a closed pipe, the note of fundamental frequency can be produced if the length of the air column is equal to ____________.

1 litre of an ideal gas at 27 °C is heated at a constant pressure to 127 °C. The final volume is approximately ______.

If the Earth-Sun distance is held constant and the mass of the Sun is doubled, then the period of revolution of the earth around the Sun will change to ____________.

5 m long see-saw remains horizontal when two children weighing 20 kg and 30 kg respectively sit at two ends. Where is the see-saw supported?

How many moles of acetic acid are obtained in the reaction when one mole glucose is treated with excess acetic anhydride?

Which among the following reagents is used for conversion of glucose to glucoxime?

In the following compounds, the decreasing order of basic strength will be _______________.

IUPAC name of p-toluidine is ____________.

In the Wolff-Kishner reduction of alkyl aryl ketones, ketones are first converted into ____________.

Phenoxide ion is more stable than phenol due to the ____________.

In propylene glycerol, −OH groups are attached to ____________ carbon atoms.

The compound with the lowest boiling point is ____________.

Which of the following compounds is obtained when t-butyl bromide is treated with alcoholic ammonia?

Which coordinate compound from following has a net negative charge on complex ion?

The term anomers of glucose refer to ____________.

Which oxidation states CORRECTLY represent the usual range exhibited by the stated metal?

The coordination number of central metal atom/ion in a complex is ____________.

Identify the coordinate complex having ambidentate ligand from following.

The electronic configuration of thorium (Z = 90) is ____________.

Identify the formula of lanthanoid oxide formed when lanthanoid (Ln) is burnt in oxygen.

Which of the following elements has lowest tendency to form its oxide?

Which of the following noble gas molecules is more polarized by water?

The half-life of a first order reaction is 6.0 hour. How long will it take for the concentration of reactant to decrease from 0.4 M to 0.12 M?

The standard emf of Daniel cell is 1.10 volt. What is the maximum electrical work obtained from Daniel cell? (F = 96500 C)

Standard molar entropy is ______.

Enthalpy of formation of two compounds x and y are −84 kJ and −156 kJ respectively. Which of the following statements is CORRECT?

Thermodynamics deals with ______.

When 0.01 mole of sugar is dissolved in 100 g of a solvent, the depression in freezing point is 0.50°C. When 0.02 mole of glucose is dissolved in 50 g of the same solvent, the depression in freezing point will be ____________ °C.

When a cation or anion from ionic solid leaves its regular lattice site and moves to occupy an interstitial site, it is called as ____________.

____________ is an example of molecular crystal. 

Dow's process is used for the synthesis of an aromatic compound (X). Identify X.

In oxy-acetylene flame for welding and cutting of metals, a mixture of ____________ is used.

What is a common name of the compound 1-Chloro-2, 2-dimethylpropane?

The density of an ideal gas can be expressed as d = ____________.

Which of the following is a redox reaction?

Which of the following is less covalent than NaCl?

Which of the following is an isotone of `""_7^14"N"`?

____________ states that equal volumes of all gases under identical conditions of temperature and pressure contain equal number of molecules.

Identify the pioneer organisms that would appear on bare rocks.

Identify the correct order of primary succession in water bodies.

Identify the correct sequence of hydroseric succession.

Match the Columns.

	Column I		Column II
i.	Hibernation	a.	Birds in winter
ii.	Aestivation	b.	Polar bear in winter
iii.	Migration	c.	Some snails and fish in summer

In the given picture, identify the type of interspecific interaction. 

Mutualism can be represented as the interaction between ____________.

On which of the following factors does the population growth of a country depends upon?

____________ organisms are tolerant for a wide range of salinities.

Which of the following is the correct explanation of why a species creates its own unique niche in an ecosystem?

Which of the following components are used for improving fish quality?

For which of the following purpose Tissue Plasminogen Activator (TPA) is used?

Identify the correct term used to represent the DNA molecule formed by joining a gene coding for insulin to a plasmid pBR322 by using DNA ligase.

The following identifies the major features of technology that differentiate modem biotechnology from classical biotechnology.

i. Capability of science to change the genetic material for getting new specific products through rDNA technology, polymerase chain reaction (PCR), microarrays, cell culture and fusion, and bioprocessing.

ii. Ownership of technology and its sociopolitical impact.

iii. Modem biotechnology makes use of only fermentation technology.

iv. Classical biotechnology relies only on principles of plant and animal tissue culture.

Which of the following DNA sequence is recognised and cut by EcoR I?

Which of the following device is required for PCR?

Match the List I with List II and List ill. Select the correct option.

	List I		List II		List ill
i.	Hind III	a.	Agarose ge	1.	Six base pairs
ii.	pBR322	b.	Agrobacterium	2.	Selectable marke
iii.	T-DNA	c.	Ampicillin	3.	Elution
iv.	DNA	d.	Recognition sequenc	4.	Transgenic plant

______ refers to the process by which deoxyribonucleoside triphosphate is formed from deoxyribonucleoside monophosphate.

Identify the CORRECT statement regarding Mycorrhiza.

Which of the following is the INCORRECT statement?

______ stage is the last step of biogas production.

Which of the following occurs during tertiary treatment?

Identify the organism used in the production of erythromycin.

In plant tissue culture auxin is used for ____________.

Smack is obtained from the ____________ of poppy plant.

The levels of which neurotransmitter are increased by using Cocaine?

AIDS is ______.

Dengue is transmitted by ____________.

Identify the CORRECT match.

Which of the following is NOT an example of ectoparasitism?

Which of the following is TRUE for the temporal lobe?

Identify the motor nerves.

There are ____________ lumbar spinal nerves.

Which of the following statements is TRUE for medullated nerve fibre?

Identify the CORRECT statement.

The structural and functional units of the nervous system is ______.

Which of the following is/are TRUE regarding thrombocytes?

Identify the normal haemoglobin count in human females.

Reduction in number of ______ can cause clotting disorder, leading to excessive loss of blood from the body.

When you hold your breath, identify the gas changes that occur in blood and would first lead to the urge to breathe.

______ of nasal chamber warms the air and makes it moist.

______ refers to the physical process by which gaseous exchange takes place between the atmosphere and the lungs.

____________ refers to a biochemical process of oxidation of organic compounds in an orderly manner for the liberation of chemical energy in the form of ATP.

Which of the following is NOT a physiological role of Gibberellin?

Suppression of the growth of ______ takes place due to auxin.

Match the following lists and select the correct option.

	List I		List II
i.	2,4-D	a.	Promotes senescence and ripening of fruits
ii.	ABA	b.	DelaysJeaf senescence
iii.	Gibberellins	c.	Increases the length of the sugarcane stem
iv.	Ethylene	d.	Kills dicotyledonous weeds without affecting mature monocotyledonous plants
		e.	Stimulates the closure of stomata

What is the proportion of hydrogen and oxygen in carbohydrates formed by plants during photosynthesis?

In which of the following zones root hair occurs?

Identify the type of water that is available to the plants.

Root hair occurs in the zone of ____________.

____________ regions are present in a typical root.

______ had cranial capacity almost equal to modern man.

All are major changes that took place in evolution of man, EXCEPT

The modem synthetic theory of evolution does NOT include ____________.

Which of the following phenomena results in genetic recombination?

Which of the following is TRUE for zygote mortality?

From the following identify the INCORRECT match.

In the genetic dictionary, there are 64 codons as ______

The addition of nucleotides on the lagging strand occurs ____________ during DNA replication.

In which direction polymerization of DNA nucleotides occurs during the synthesis of lagging strand?

The chromatin is packed to form a solenoid structure of ______ diameter.

Match the Column-I with Column-II and choose the CORRECT answer

	Column-I		Column-II
P.	Klinefelter syndrome	i.	Mutation in autosomal gene
Q.	Thalassaemia	ii.	Mutation sex chromosome linked gene
R.	Down syndrome	iii.	Trisomy of autosome
S.	Colour blindness	iv.	Trisomy of sex chromosome

Which type of sex determination is observed in honey bee?

Holandric genes are found only in ____________.

Which type of progeny would be produced if a normal visioned man marries a colour-blind woman?

The phenomenon of ____________ is universal and it is necessary for the natural selection, because it increases the chances of variation.

Identify the statementls that is/are NOT the correct reason/s for Mendel's success in his hybridization experiments.

i. Each factor controlled the single trait and is located on separate chromosomes.

ii. In the pea plant, contrasting characters can be easily recognized.

iii. Mendel carefully recorded the number of plants of each type and expressed his results as ratios.

iv. Mendel performed biochemical assays for identifying the position of 'factors' on chromosome.

Which of the following hormones is produced by ovary?

Identify the correct order of human embryo development.

Which is the correct order of steps occurring during spermatogenesis?

Which of the following occurs during maturation phase of spermatogenesis?

Complete the analogy.

1 primary spermatocyte : 4 spermatozoa :: 1 primary oocyte : ____________.

Identify the INCORRECTLY labelled structure in the given diagram of the male reproductive system. 

______ refers to the formation of seeds without fertilization.

In which of the following pollination occurs?

Which of the following induces pollen germination and tube growth in vitro?

ln which of the following cross-pollination does not occur?

Into which of the following the functional megaspore in an angiosperm develops?

The glomerulus filters most of its contents due to hydrostatic pressure created. This pressure is about ____________.

Which statement is INCORRECT regarding mechanism of urine formation in man?

The DCT of the nephron is important as it will ______

In cases of dehydration, the JG cells will release ______.

Organisms which require about 300 - 500 ml of water per gm of ammonia for their excretion are ______.

Which of the following is NOT a symptom of Marasmus?

Which of the following digestive juices contains the enzyme maltase?

Which is true for actvity of enzyme pepsin?

____________ secrete intrinsic factor.

The crown of the tooth is covered by the hardest substance of the body called the ____________.

Which of the following enzyme converts glucose to glucose-6-phosphate?

Alcoholic fermentation is a type of anaerobic respiration where the pyruvate is ____________.

Which type of reaction is TCA cycle?

____________ ATPs will be effectively produced during the production of 1 molecule of acetyl-CoA from 1 molecule of pyruvic acid.

____________ is necessary for the respiration in plant.

Nucleotides = ____________.

Identify (i) and (ii) and select the correct option.

i. Protein portion of the enzyme is called the ____________.

ii. Non-protein constituent binding to the enzyme is called as the ____________.