MHT - CET MCQ

In the case of NAND gate, if A and Bare in the inputs and Y is the output, then ______.

In a silicon transistor, a change of 7.89 mA in the emitter current if produces a change of 7.8 mA in the collector current, then the base current must change by ____________.

A common emitter amplifier is designed with n-p-n transistor (α = 0.99). The input impedance is 1 kΩ and the load is 10 kΩ. The voltage gain will be ______

Using Bohr's quantization condition, what is the rotational energy in the second orbit for a diatomic molecule. (I = moment of inertia of diatomic molecule, h = Planck's constant)

In Bohr's model of hydrogen atom, the period of revolution of the electron in any orbit is proportional to ______.

The energy (in eV) required to excite an electron from n = 2 to n = 4 state in hydrogen atom is ____________.

Which one of the following graphs represents the variation of photoelectric current (i) with intensity (I) of the incident light?

The work function of a photosensitive material is 4.0 eV. The longest wavelength of light that can cause photon emission from the substance is (approximately) ____________.

Photoelectrons emitted from a metallic surface are initially ____________.

In an a.c. circuit containing L, C, R is series, the ratio of true power to apparent power is (Z = impedance of the circuit, R = resistance, `phi` = phase difference between the r.m.s. values of current and e.m.f.) ____________.

The rms value of current in a 50 Hz AC circuit is 6 A. The average value of AC current over a cycle is ____________.

Alternating current of peak value `(2/pi)` ampere flows through the primary coil of transformer. The coefficient of mutual inductance between primary and secondary coil is 1 H. The peak e.m.f. induced in secondary coil is ______. (Frequency of a.c. = 50 Hz)

Consider a solenoid carrying supplied by a source with a constant emf containing iron core inside it. When the core is pulled out of the solenoid, the change in current will ______.

Relative permeability of nickel is 550, then its magnetic susceptibility will be ____________.

An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude ____________.

The sensitivity of moving coil galvanometer is inversely proportional to ____________.

A straight wire of length 0.5 m and carrying current of 1.2A is placed in a uniform magnetic field of induction 2T. The magnetic field is perpendicular to the length of the wire. What is the force acting on the wire? sin 90° = 1

The resistances in left and right gap of a metrebridge are 20 `Omega` and 30 `Omega` respectively. When the resistance in the left gap is reduced to half its value, the balance point shifts by ______.

Kirchhoff's law of radiation proves that ______

What determines the conventional direction of the product of current and resistance while applying the Kirchhoff's law?

Which of the following molecules is a polar molecule?

Statement - 1: For practical purpose, the earth is used as a reference at zero potential in electrical circuits.

Statement - 2: The electrical potential of a sphere of radius R with charge Q uniformly distributed on the surface is given by `Q/(4piepsilon_0R)`.

Band width for red light of wavelength 6600 Å is 0.42 mm. If red Light is replaced by blue light of wavelength 4400 Å, then the change m bandwidth will be ____________.

A plane wavefront is an incident on a water surface at an angle of incidence 60° then it gets refracted at 45°. The ratio of the width of incident wavefront to that of refracted wavefront will be ______

`[sin pi/4 = cos pi/4 = 1/sqrt2, sin60^circ = sqrt3/2, cos60^circ = 1/2]`

In a stationary wave all particles ______

In case of vibrating string, the frequency of the fifth harmonic is equal to frequency of the ____________.

Two identical samples of a gas are allowed to expand (i) isothermally (ii) adiabatically. Work done is ____________.

Temperatures of two stars are in the ratio 3 : 2. If wavelength of maximum intensity of first star is 4500 Å, the corresponding wavelength for second star is ______.

Half part of an ice block is covered with black cloth and rest half is covered with white cloth and then it is kept in sunlight. After some time, clothes are removed to see the melted ice. Which of the following statements is correct?

Reynold's number is less for ______.

A particle of mass m is rotating in a plane in a circular path of radius r. Its angular momentum is L. The centripetal force acting on the particle is ______.

Consider the junction diode as ideal. The value of current flowing through AB is ______.

Where should a person stand in front of a concave mirror of radius of curvature 20 cm to get a real image of his own, 2 times larger?

The pitch of the whistle of an engine appears to drop to`(5/6)^"th"` of original value when it passes a stationary observer. If the speed of sound in air is 350 m/s then the speed of engine is ____________.

If a body weighing 40 kg is taken inside the earth to a depth to radius of the earth, then `1/8`th the weight of the body at that point is ______.

For regular shapes of the small body, which of the following statement is true?

A particle is moving along the circular path of radius 'r' with velocity 'v'. The magnitude of average acceleration after half revolution is ______.

Figure shows the displacement-time graph of a particle moving along x-axis.

____________ plays an important role in sustainable development.

Which of the following polymer is used to make blankets?

Which of the following catalysts is used in preparation of terylene?

Which among the following polymers belongs to class thermoplastic polymers?

Which of the following statement is NOT true about saccharic acid?

One mole of a carbohydrate on hydrolysis gives one mole of glucose and one mole of galactose. Identify the carbohydrate.

______ is the prosthetic group of glycoproteins.

When propanamide is treated with bromine and aqueous sodium hydroxide, the compound formed is ____________.

Identify compound 'A' in the following reaction.

Which of the following is a Wolf - Kishner reduction?

Which of the following gives red precipitate with Fehling's solution?

Acetic anhydride is obtained from acetyl chloride by the reaction of ____________.

Identify 'A' and 'B' in the following series of reactions.

In the Lucas test for alcohols, the appearance of turbidity is due to the formation of ____________.

Identify the compound that gives 2, 5-dimethylhexane by reacting with sodium metal in presence of dry ether.

Which of the following has zero dipole moment?

Which among the following is a correct formula of Bariumtetrachlorocuprate (ll)?

Identify cationic complex from the following.

Which of the following properties is NOT of lanthanoids?

The major product obtained when aniline undergoes sulphonation using cone. sulphuric acid at 453-473 K is:

Which of the following structure represents chloric acid?

During discharging the change taking place at cathode in lead accumulator is:

Identify the INCORRECT statement.

Which of the following set represents weak acids?

In cold countries, ethylene glycol is added to the water in the radiators of cars during winter. This results in ____________ of water.

Relative lowering in vapour pressure depends on _______.

Which of the following crystal systems shows base-centred unit cell?

Identify the CORRECT statement about the two allotropic forms of selenium.

Which of the following is a major product obtained in the reaction of isobutylene with hydrogen bromide?

Identify the CORRECT statement.

Isochor is the graph plotted between ______.

Which of the following molecules has bond order zero?

The number of sigma bonds in paracetamol is ____________.

According to Bohr's theory, an electron can move only in those orbits for which its angular momentum is integral multiple of ____________.

When there is excessive sweating, retains water with the help of ______.

Currently, ______ mass extinction is considered to be the progressing at an alarming rate due to the loss of biodiversity.

____________ are the most abundantly found species of animals.

Which of the following trends is observed in species diversity with respect to latitude?

Where does secondary succession generally occur?

Which of the following represents the correct order of succession observed in the aquatic habitat?

In which area is xerarch succession observed?

Read the following statements and select the correct option.

Statement I: Some snails and fish undergo hibernation to avoid summer heat.

Statement II: Polar bears undergo hibernation in winters as they are unable to migrate

______ is the adaptation of an organism i which it matches its colour with its surroundings to get protected from predators.

Polar bears undergo ____________ during winter.

Polar bears undergo ____________ during winter.

Identify the ecological organisation constituting a large regional terrestrial unit delimited by a specific climatic zone having major vegetation zone and the associated fauna.

Match the column I (PCR steps) and Column II (Temperature). Select the correct option.

	Column I (PCR steps)		Column II (Temperature)
i.	Polymerization	P.	40 - 60°C
ii.	Denaturation	Q.	70 - 75°C
iii.	Primer annealing	R.	90 - 98°C
		S.	28 - 37°C

Identify the process by which bacteria protect their own DNA from the attack of restriction enzymes.

From the following which one is NOT a feature of the plasmids?

On which of the following two core techniques modem biotechnology is based?

______ are nitrogen fixing micro-organisms.

Which of the following is/are the benefits of biogas?

Identify the equipment which is essentially required for growing microbes on a large scale, for industrial production of enzymes.

Which of the following is CORRECT with respect to biofortification?

Identify the CORRECT statement.

Which of the following is the causative agent of malignant malaria?

Which of the following disease can be treated using diethylcarbamazine citrate?

Which type of resistance against pathogens does a human acquire through life?

Identify the cells which release the antibodies.

In acquired immunity there is a specific mechanism for each foreign molecule. This property is known as _______.

Which part of brain controls vomiting?

Subdural space is present between (i)____________ and (ii)____________.

Match the Column - I with Column - II:

	Column I		Column II
i.	P - wave	p.	Depolarisation of ventricles
ii.	QRS complex	q.	Repolarisation of ventricles
iii.	T - wave	r.	Coronary ischemia
		s.	Development of atria
		t.	Repolarisation of atria

____________ is the interconnection between two neurons or neuron with motor organ.

The nervous system of Hydra ____________.

Calculate the heart rate of a person if the cardiac output is SL, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50mL.

Which of the following event occurs during atrial systole?

Match the items given in Column I (Valves) with those in Column II (Location) and select the correct option.

	Column I		Column II
i.	Tricuspid valve	a.	Between left atrium and left ventricle
ii.	Bicuspid valve	b.	Between right ventricle . and pulmonary artery.
iii.	Semilunar valve	c.	Between right atrium and right ventricle

The pharynx opens into trachea through an opening called ______ guarded by a cartilaginous flap called ______.

With which of the following haemoglobin combines to form carboxyhaemoglobin?

Identify the CORRECT sequence of events for the transport of respiratory gases.

Which phytohormone is used to prevent dwarfness?

Which fungus releases gibberellin?

Among the following which is a natural auxin?

In which part of plant does auxin synthesis occur?

Formation of inter-fascicular cambium is aided by which hormone?

In soil, ______is available for absorption by plant roots.

______ refers to the microenvironment surrounding the root from which plants absorb water.

How many regions are there in a typical root?

Maximum absorption of water takes place in the zone of ____________ in plants.

From the following which is NOT a property of water?

Australopithecus was first discovered in which place?

The first fossils of Dtyopithecu were found in ______.

Industrial melanism is one of the best example for ____________.

______ is the separation of the population of a particular species into smaller units which prevents interbreeding between them.

____________ refers to the process of copying of genetic information from one (template) strand of DNA into a single stranded RNA transcript.

For which of the following purpose agarose gel electrophoresis technique is used?

The octamer of histone protein is made of ______.

Study the following statements and select the correct option.

Statement I: In the experiment performed by Hershey and Chase, viruses grown on radioactive phosphorus medium contained radioactive DNA, but not radioactive protein.

Statement II: DNA contains phosphorus, whereas protein lacks phosphorus

Through which of the following experiments DNA was proved to be the genetic material in E. coli and bacteriophage?

Which of the following statement/s are INCORRECT with respect to crossing over?

i. Crossing over produces recombinations of genes by interchanging and exchanging corresponding segments between nonsister chromatids of homologous chromosomes.

ii. Crossing over occurs during zygotene of prophase I of meiosis.

In ____________, one could get same genotypic and phenotypic ratio.

Which of the following statements is correct with respect to individuals with blood group 'O'?

Human skin colour is an example of ______

During which process is the egg released from the Graafian follicle?

The pair of thin folds present inner to the labia majora is ____________.

Identify the approximate number of lobules present in the testis.

In the given diagram represents the

The given diagram represents T. S of

Due to presence of which of the following chemical component, pollen grains can remain well preserved in fossil?

Which of the following type of plants are nocturnal and open their flower during night?

In the following case mention the correct ratio of pollen mother cells, generative cells, vegetative cells, and male gametes produced by the microsporangium.

A total of 168 pollen grains with 14 chromosomes in each pollen grain are released from a mature microsporangium.

______ refers to the flower in which gynoecium possesses many free carpels.

Which of the following are the chemical components of the wall of pollen tube?

Identify the chromosome number of the endosperm in the following case. In an angiosperm a female plant having 2n = 24 is crossed with a male plant having 2n = 12.

The loop of Henle and collecting ducts lie in the ____________ of the kidney.

Where does facultative reabsorption of sodium ions and water take place?

The mode of excretion observed in spiders is called ____________.

The CORRECT match is ______.

Complete the analogy with respect to Gross Calorific Value.

Fats: 9.45 :: Carbohydrates : ______

Which salivary gland is present below the lower jaw?

(i)______ and (ii)______ form the common bile duct.

Identify the process in which complex, nondiffusible and non-absorbable food substances are converted into simple, diffusible and assimilable substances.

Synthesis of Adenosine triphosphate during electron transfer system refers to ______.

Peptide bond Links carboxylic group with amino group of consecutive amino acids along with the release of ______.

Identify the end product of the glycolysis process.

____________ bonds are absent in DNA.

Proteins are ______ of amino acids.

Identify the type of fatty acid that is represented in the following structure.

Monosaccharides are ______ in nature.

Which enzymes would work sequentially on potatoes consumed by an individual?