MHT CET Mock Test Series PCB 12-13 Sep 20

For a gas R/Cv =0.4, where ‘R’ is the universal gas constant and ‘Cv’ is molar specific heat at constant volume. The gas is made up of molecules which are

Wire having tension 225 N produces six beats per second when it is tuned with a fork. When tension changes to 256 N, it is tuned with the same fork, the number of beats remain unchanged. The frequency of the fork will be

In vertical circular motion, the ratio of kinetic energy of a particle at highest point to that at lowest point is

Assuming the expression for the pressure exerted by the gas on the walls of the container, it can be shown that pressure is

Two wires having same length and material are stretched by same force. Their diameters are in the ratio 1 : 3. The ratio of strain energy per unit volume for these two wires (smaller to larger diameter) when stretched is

A mass ‘m1’ connected to a horizontal spring performs S.H.M. with amplitude ‘A’. While mass ‘m1’ is passing through mean position another mass ‘m2’ is placed on it so that both the masses move together with amplitude ‘A1’. The ratio of A1/A is (m2 < m1)

A ring and a disc roll on the horizontal surface without slipping with same linear velocity. If both have same mass and total kinetic energy of the ring is 4 J then total kinetic energy of the disc is

A particle moves along a circle of radius ‘r’ with constant tangential acceleration. If the velocity of the particle is ‘ν’ at the end of second revolution, after the revolution has started then the tangential acceleration is

When the observer moves towards the stationary source with velocity, ‘V1’, the apparent frequency of emitted note is ‘F1’. When the observer moves away from the source with velocity ‘V1’, the apparent frequency is ‘F2’. If ‘V’ is the velocity of sound in air and F1/F2=2 then V/V2=?

Two strings A and B of same material are stretched by same tension. The radius of the string A is double the radius of string B. Transverse wave travels on string A with speed ‘VA’ and on string B with speed ‘VB’. The ratio

VA/VB is

Let a steel bar of length ‘l’, breadth ‘b’ and depth ‘d’ be loaded at the centre by a load ‘W’. Then the sag of bending of beam is (Y = Young’s modulus of material of steel)

The bob of a simple pendulum performs S.H.M. with period ‘T’ in air and with period ‘T1’
in water. Relation between ‘T’ and ‘T1’ is (neglect friction due to water, density of the material of the bob is = 9/8 ×10^3kg/m3, density of water = 1 g/cc )

Which of the following quantity does NOT change due to damping of oscillations ?

In a capillary tube of radius ‘R’, a straight thin metal wire of radius ‘r’ (R > r) is inserted
symmetrically and one end of the combination is dipped vertically in water such that the
lower end of the combination is at same level. The rise of water in the capillary tube is
[T = surface tension of water, ρ = density of water, g = gravitational acceleration]

If the end correction of an open pipe is 0.8 cm then the inner radius of that pipe will be

When open pipe is closed from one end then third overtone of closed pipe is higher in
frequency by 150 Hz than second overtone of open pipe. The fundamental frequency of
open end pipe will be

A progressive wave is represented by y = 12 sin (5t – 4x) cm. On this wave, how far away
are the two points having phase difference of 90° ?

A disc of radius ‘R’ and thickness R/6 has moment of inertia ‘I’ about an axis passing through
its centre and perpendicular to its plane. Disc is melted and recast into a solid sphere. The
moment of inertia of a sphere about its diameter is

Two particles of masses ‘m’ and ‘9m’ are separated by a distance ‘r’. At a point on the line
joining them the gravitational field is zero. The gravitational potential at that point is
(G = Universal constant of gravitation)

A black rectangular surface of area ‘A’ emits energy ‘E’ per second at 27°C. If length and
breadth are reduced to 1/3 rd of initial value and temperature is raised to 327°C then
energy emitted per second becomes

A liquid drop having surface energy ‘E’ is spread into 512 droplets of same size. The final
surface energy of the droplets is

In potentiometer experiment, null point is obtained at a particular point for a cell on
potentiometer wire x cm long. If the length of the potentiometer wire is increased without
changing the cell, the balancing length will (Driving source is not changed)

Let ‘M’ be the mass and ‘L’ be the length of a thin uniform rod. In first case, axis of rotation
is passing through centre and perpendicular to the length of the rod. In second case axis of
rotation is passing through one end and perpendicular to the length of the rod. The ratio of
radius of gyration in first case to second case is

An iron rod is placed parallel to magnetic field of intensity 2000 A m. The magnetic flux
through the rod is 6 × 10¯4  Wb and its cross-sectional area is 3 cm². The magnetic permeability
of the rod in Wb/A-m is

A simple pendulum of length ‘l’ has maximum angular displacement ‘ θ’. The maximum
kinetic energy of the bob of mass ‘m’ is
(g = acceleration due to gravity)

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

Angular speed of hour hand of a clock in degree per second is

An electron of mass ‘m’ has de-Broglie wavelength ‘λ’ when accelerated through potential
difference ‘V’. When proton of mass ‘M’, is accelerated through potential difference ‘9V’,
the de-Broglie wavelength associated with it will be (Assume that wavelength is determined
at low voltage)

The value of gravitational acceleration ‘g’ at a height ‘h’ above the earth’s surface is g/4 then
(R = radius of earth)

Interference fringes are produced on a screen by using two light sources of intensities ‘I’ and
‘9I’. The phase difference between the beams is π/2
at point P and π at point Q on the screen.
The difference between the resultant intensities at point P and Q is

The maximum frequency of transmitted radio waves above which the radio waves are no
longer reflected back by ionosphere is _______ (N = maximum electron density of ionosphere,
g = acceleration due to gravity)

Three parallel plate air capacitors are connected in parallel. Each capacitor has plate area
‘A’/3 and the separation between the plates is ‘d’, ‘2d’ and ‘3d’ respectively. The equivalent
capacity of combination is (∈0 = absolute permittivity of free space)

In Bohr’s theory of Hydrogen atom, the electron jumps from higher orbit ‘n’ to lower orbit
‘p’. The wavelength will be minimum for the transition

In an oscillator, for sustained oscillations, Barkhausen criterion is Aβ equal to (A = voltage
gain without feedback, β = feedback factor)

Two identical parallel plate air capacitors are connected in series to a battery of e.m.f. ‘V’. If
one of the capacitor is completely filled with dielectric material of constant ‘K’, then potential
difference of the other capacitor will become

Light of wavelength ‘λ’ which is less than threshold wavelength is incident on a photosensitive
material. If incident wavelength is decreased so that emitted photoelectrons are moving with
same velocity then stopping potential will

The LC parallel resonant circuit

A ray of light travelling through rarer medium is incident at very small angle ‘i’ on a glass
slab and after refraction its velocity is reduced by 20%. The angle of deviation is

A galvanometer of resistance 30Ω is connected to a battery of emf 2V with 1970Ω resistance
in series. A full scale deflection of 20 divisions is obtained in the galvanometer. To reduce
the deflection to 10 divisions, the resistance in series required is

Two coherent sources ‘P’ and ‘Q’ produce interference at point ‘A’ on the screen where
there is a dark band which is formed between 4th bright band and 5th bright band. Wavelength
of light used is 6000A. The path difference between PA and QA i

From Brewster’s law, except for polished metallic surfaces, the polarising angle

Two particles X and Y having equal charges after being accelerated through same potential
difference enter a region of uniform magnetic field and describe a circular paths of radii ‘r1’
and ‘r2’ respectively. The ratio of the mass of X to that of Y is

The amount of work done in increasing the voltage across the plates of capacitor from 5V to
10V is ‘W’. The work done in increasing it from 10V to 15V will be

When an electron in Hydrogen atom revolves in stationary orbit, it

Magnetic flux passing through a coil is initially 4 × 10 ^– 4 Wb. It reduces to 10% of its
original value in ‘t’ second. If the e.m.f. induced is 0.72 mV then ‘t’ in second is

The magnetic field (B) inside a long solenoid having ‘n’, turns per unit length and carrying
current ‘I’ when iron core is kept in it is (μ0 = permeability of vacuum, χ = magnetic susceptibility)

Resolving power of telescope increases when

In balanced metre bridge, the resistance of bridge wire is 0.1Ω/ cm. Unknown resistance
‘X’ is connected in left gap and 6Ω in right gap, null point divides the wire in the ratio 2 : 3.
Find the current drawn from the battery of 5 V having negligible resistance.

When light of wavelength ‘λ’ is incident on photosensitive surface, the stopping potential is
‘V’. When light of wavelength ‘3λ’ is incident on same surface, the stopping potential is
‘V’/6 . Threshold wavelength for the surface is

The equation that represents van’t Hoff general solution equation is

If ‘n’ represents total number of asymmetric carbon atoms in a compound, the possible
number of optical isomers of the compound is

Name the reagent that is used in leaching of gold

Which is the most stable allotrope of sulphur ?

Which of the following is an analgesic ?

Correct statement for thermoplastic polymer is

The compound which is NOT formed when a mixture of n-butyl bromide and ethyl bromide
treated with sodium metal in presence of dry ether is

How many Faradays of electricity are required to deposit 10 g of calcium from molten
calcium chloride using inert electrodes ? (molar mass of calcium = 40 g mol–1)

Butylated hydroxy anisole is

What is the general molecular formula of the products obtained on heating lanthanoids (Ln)
with sulphur ?

Bulletproof helmets are made from

In the cell represented by Pb(s) |Pb^2+ (1M) | Ag^+ (1M) | Ag(s)  the reducing agent is

Which metal is refined by Mond Process ?

Which metal crystallises in a simple cubic structure ?

Isopropyl methyl ether when treated with cold hydrogen iodide gives

The amine ‘A’ when treated with nitrous acid gives yellow oily substance. The amine A is

In face centred cubic unit cell, what is the volume occupied ?

The element that does NOT form acidic oxide is

Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms presence of

While assigning R, S configuration the correct order of priority of groups attached to chiral
carbon atom is

Which halide of magnesium has highest ionic character ?

How is sodium chromate converted into sodium dichromate in the manufacture of potassium
dichromate from chromite ore ?

The reaction takes place in two steps as
i) NO2Cl(g) ⎯K ⎯→1 NO2 (g) + Cl (g)
ii) NO2Cl (g) + Cl (g) ⎯K⎯→2 NO2 (g) + Cl2 (g)
Identify the reaction intermediate

In dry cell, what acts as negative electrode ?

Which of the following aminoacids is basic in nature ?

Select the compound which on treatment with nitrous acid liberates nitrogen.

The relation between solubility of a gas in liquid at constant temperature and external pressure
is stated by which law ?

5.0 g of sodium hydroxide (molar mass 40 g mol–1) is dissolved in little quantity of water
and the solution is diluted up to 100 ml. What is the molarity of the resulting solution ?

Which among the following phenolic compounds is most acidic in nature ?

Which of the following compounds when treated with dibenzyl cadmium yields benzyl
methyl ketone ?

The rate constant and half life of a first order reaction are related to each other as

Which among the following solids is a nonpolar solid ?

What is the combining ratio of glycerol and fatty acids when they combine to form triglyceride ?

Identify the metal that forms colourless compounds.

The molecular formula of Wilkinson catalyst, used in hydrogenation of alkenes is

What is the highest oxidation state exhibited by group 17 elements ?

The criterion for a spontaneous process is

Mathematical equation of first law of thermodynamics for isochoric process is

Brown ring test is used for detection of which radical ?

Name the catalyst used in commercial method of preparation of phenol.

The reagent used in Wolff-Kishner reduction is

Identify an extensive property amongst the following

Which of the following is a neutral complex ?

Which of the following carboxylic acids is a tricarboxylic acid ?

Identify the compound amongst the following of which 0.1 M aqueous solution has highest
boiling point

Average rate of reaction 2 SO2 (g) + O2 (g) ⎯⎯→ 2 SO3 (g) is written as

What is the reagent used in Etard reaction ?

What is the amount of work done when 0.5 mole of methane, CH4 (g), is subjected to
combustion at 300 K ? (given, R = 8.314 J K–1 mol–1)

The most abundant noble gas in atmosphere is

Primary nitroalkanes are obtained in good yield by oxidising aldoximes with the help of

Which of the following in embryo sac of angiosperms shows filiform apparatus ?

Which one of the following organism’s plasmid was used successfully for the first time as a vector by Stanley Cohen and Herbert Boyer ?

. During a dihybrid cross with contrasting characters in the F2 generation parental genotypes will appear in _________ ratio.

The wall of pollen tube is made up of

The micro consumers are commonly called ___________

The CORRECT sequence of events during double fertilization in Angiosperms is

When genomic DNA is fragmented and cloned, the screening of the desired gene is done by using

The guano deposits are obtained from the excreta of __________

. In an angiosperm a female plant having 2n = 24 is crossed with a male plant having 2n = 12. What will be the chromosome number of the endosperm ?

Two alternative forms of a gene or alleles are located on __________

Which of the following is a character of Castor plant to avoid autogamy ?

During hybridization offsprings with hybrid vigour superior to both parents are self pollinated for few successive generations to _________

Which of the following is the WRONG match between the plant and its character for adaptation of cross pollination ?

What is the outbreeding device, where the stamens and carpels mature at different times called ?

In anaerobic respiration acetaldehyde is reduced to form alcohol by utilising NADH2 obtained from ____________

Which of the following wall layer of anther shows fibrous thickenings of callose ?

Photosynthesis is considered as an oxidation reaction because ________

Which one of the following is the CORRECT order of conversion of waste
materials during biogas formation ?

Match the plant and the part in relation to Vegetative Propagation.

1) Dahlia                                 a) Eyes
2) Solanum tuberosum       b) Runner
3) Begonia                             c) Fasciculated tuberous roots
4) Cynodon                           d) Epiphyllous buds

Agrobacterium tumefaciens is most widely used for gene transfer because
_________

Remarkable increase in rice production from 35 million tones to 89.5 million
tones during 1960 – 2000 was mainly due to _________

Which of the following is the first cell of female gametophytic generation in
Angiosperms ?

During dihybrid cross, in the F2 generation, the ratio of individuals showing
one dominant and the other recessive character will be _________ of parents
with contrasting characters.

In an ecological succession the pioneers are generally ___________

Given below are some antibiotics and their microbial source. Match the correct
pairs.

1) Chloromycetin a) Streptomyces griseus
2) Erythromycin b) Penicillium chrysogenum
3) Penicillin c) Streptomyces erythreus
4) Streptomycin d) Streptomyces venezuelae

In Kreb’s cycle Guanosine Triphosphate is formed during the conversion of

Mycorrhiza is __________

During PCR technique, the pairing of primers to ssDNA segment is called ________

___________ is the most convenient and cheap method of artificial vegetative

Glycosidic bond exists in DNA molecule between __________

In plasmid pBR 322, ‘BR’ stands for

How many glucose molecules are required for the formation of 52 pyruvic
acid molecules at the end of glycolysis ?

The pitch angle of deflection between two successive base pairs in DNA
double helix is

Which one of the following processes involved in alcohol production is NOT
involved in wine production ?

Which one of the following is formed as a result of cyclic photophosphorylation ?

What will be the genotype of parents of a child with ‘O’ blood group ?

In Angiosperms, megaspores formed after meiosis of megaspore mother cell
are arranged in __________

During replication of DNA, the two strands of the double helix are separated
from each other under the influence of enzyme __________

Identify the INCORRECT statement from the following with reference to lac operon.

High levels of Aspartic acid, low nitrogen and sugar content in maize plants
prevent the attack by __________

Which of the following event does NOT lead into secondary succession ?

A nucleosome along with linker DNA consists of ____________

During aerobic respiration the final electron acceptor is

In quantitative inheritance, when a character is controlled by two pairs of
genes, the ratio obtained in F2 generation is __________

Which one of the following pigment functions as a reaction center in
photosynthesis ?

The common feature in CAM and C4 plants is __________

Which one of the following electron acceptor is present in respiratory chain ?

The codon sequence on coding strand of transcription unit is ATG GTG AGC TAC
GCG. What will be the codon sequence on mRNA formed on template strand ?

A cross between two pea plants tall with axial flowers and dwarf with terminal
flowers produced offsprings tall with axial flowers and tall with terminal
flowers in the ratio 1 : 1. What will be the genotype of parents ?

Which one of the following is used by green sulphur bacteria for reduction of
CO2 to CH2O ?

Asexual reproduction through formation of gemmule occurs in

The marsupial mammal amongst the following animals is

When white eyed and miniature winged Drosophila melanogaster is crossed
with its wild type, it produces following percent of recombinants.

Asiatic wild ass is an example of

The quantitative and statistical study of human population is

Linkage groups can be separated during ____________ in meiosis.

One of the most polluted river in Maharashtra is

Hypercalcemic hormone is

An oral contraceptive pill checks

AB blood group was discovered by

Cystic fibrosis can be treated by _______________ in gene therapy

ADH carries out following functions EXCEPT

Which of the following are NOT produced as transgenic animals ?

Temporal lobe of cerebrum is concerned with the detection of following
sensations EXCEPT

The sterilization procedure in human female is

The process by which primary germinal layers are formed is called

Select the group of animals adapted for ammonotelism, guanotelism and
ureotelism respectively from the following

Muscular ridges at inner surface of ventricles are called

Which of the following is NOT a breed of buffalo ?

Column A               Column B             Column C
i) Coenozoic            2 – 65 mya          Origin of vertebrates
ii) Palaeozoic           500 – 165 mya      Rise of egg laying mammals
iii) Mesozoic           135 – 225 mya            Reptiles dominant
iv) Proterozoic        350 – 500 mya           Trilobites dominant
The correct match of Columns A, B and C is

In the given diagram, the role of ‘X’ is to

A pair of hormones produced by kidneys is

Alec Jeffreys used ________________ as genetic marker

Which constituent of seminal fluid helps in coagulation of semen after
ejaculation ?

Which one of the following statement is CORRECT ?

Acromegaly is caused by hypersecretion of _______________ in the adult.

Restriction endonuclease, in DNA finger printing, carries out following
process.

Which one of the following is NOT the symptom of malaria ?