NEET Mock Test - 7 - NEET MCQ

NEET Mock Test - 7 - NEET MCQ

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180 Questions MCQ Test - NEET Mock Test - 7

NEET Mock Test - 7 for NEET 2024 is part of NEET preparation. The NEET Mock Test - 7 questions and answers have been prepared according to the NEET exam syllabus.The NEET Mock Test - 7 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NEET Mock Test - 7 below.
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NEET Mock Test - 7 - Question 1

In an n-p-n transistor, 108 electrons are emitted from the emitter in 10-4 s. If  2% of electrons are lost in the base. Then the current gain in common-emitter configuration mode is

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NEET Mock Test - 7 - Question 2

The output of combination of the gates as shown in figure is

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Apply the truth table, verify with

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NEET Mock Test - 7 - Question 3

The ratio of electron and hole currents in a semi-conductor is 7/5 and the ratio of drift velocities of electrons and holes is 7/4 , then the ratio of concentrations of electrons and holes will be

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NEET Mock Test - 7 - Question 4

Suppose θ is polarising angle for a transparent medium and speed of light in that medium is v, then according to Brewster law.

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NEET Mock Test - 7 - Question 5

An object is placed at a distance of 20 cm from a thin plano-convex lens of focal length 15 cm. The plane surface of lens is now silvered. What is the position of image?

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NEET Mock Test - 7 - Question 6

An eye specialist prescribes spectacles having a combination of a convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm. The power of this lens combination is

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NEET Mock Test - 7 - Question 7

A nucleus of mass number 220, initially at rest emits an α -particle. If the Q value of the reaction is 5 MeV, then the energy of emitted α -particle will be

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NEET Mock Test - 7 - Question 8

A sample of radioactive material has a mass m, decay constant λ and molecular weight M. If avogadro’s constant is NA. Then initial activity of the sample is

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NEET Mock Test - 7 - Question 9

Activity of radioactive element decreased to one –third of original activity io in 9 years. After further 9 years, its activity will be

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NEET Mock Test - 7 - Question 10

Suppose the potential energy between electron and proton at a distance r is vary as U ∝ r2. Assuming Bohr's model of quantization of angular momentum and circular orbits, radius of the nth allowed orbit is proportional to

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NEET Mock Test - 7 - Question 11

De-Broglie wavelength of an electron in the nth Bohr orbit is λn and the angular momentum is Jn then

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NEET Mock Test - 7 - Question 12

Light with energy flux of 24 W/m2 is incident on a well polished disc of area 38.5 cm2 for one hour. The momentum transferred to the disc is

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NEET Mock Test - 7 - Question 13

A body of mass 6 kg is lowered down with help of a string with downward acceleration g/4. The work done by the string on the body in first 3s after start of the motion is (g = 10 m/s2)

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NEET Mock Test - 7 - Question 14

Light from three non-coherent sources, having same intensity, interfere at a location and produce resultant intensity 6I. If one of the three sources is switched off, then the resultant intensity at same point will be

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In case of non-coherent sources I net = ∑/
Let intensity from one source by l
3/o = 6/
⇒ lo =2/
If one source is switched off
Net intensity = 2/o = 4/

NEET Mock Test - 7 - Question 15

Figure shows a flywheel of radius 10 cm. Its moment of inertia about the axis of rotation is 0.4 kg m2. A massless string passes over the flywheel and a mass of 2 kg attached at its lower end. Angular acceleration of flywheel in (rad/s2) is nearly (g = m/s2)

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NEET Mock Test - 7 - Question 16

Radius of a planet is three times the radius of the earth and it has same average density as that of the earth. The ratio of escape speeds from surface of the planet and that from the surface of earth is

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NEET Mock Test - 7 - Question 17

Heat is supplied to a certain sample of a substance in solid state at a constant rate. The variation of temperature is plotted against time as shown in the figure. Choose the correct statement regarding the sample.

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Since time required for same temperature increase is larger in liquid state than solid state, the specific heat capacity is higher in liquid state. Since in phase transition, the heat required is less in fusion than evaporation, hence latent heat of fusion is less.

NEET Mock Test - 7 - Question 18

A simple pendulum has a time period T in vacuum. Its time period when it is completely immersed in a nonviscous liquid of density one-fourth density of material of bob is

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NEET Mock Test - 7 - Question 19

A car is moving on a road with a speed 40 m/s, blows a horn of frequency 200 Hz. The apparent wavelength of sound as observed by a detector on the road behind the car will be (Speed of sound in air is 340 m/s)

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NEET Mock Test - 7 - Question 20

The resistance of a galvanometer coil is 48 Ω . The resistance of shunt required to convert it into an ammeter of range 6 times as that of galvanometer is

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NEET Mock Test - 7 - Question 21

Six point charges are kept at the vertices of a regular hexagon of side length a and centre O as shown in the figure. Choose the correct statement.

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Eo = Zero (as electric field of one charge cancelled by electric field of charge at diagonally opposite end)

NEET Mock Test - 7 - Question 22

A cylindrical vessel filled with water upto a height H becomes empty in time t, due to a small hole at the bottom of vessel. If water is filled in same vessel to a height 4H, then time in which water level will reduce to height H, is

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NEET Mock Test - 7 - Question 23

If R1 and R2 are the radii of curvature of four double convex lenses made of same material, then lens with highest power is

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NEET Mock Test - 7 - Question 24

Two points P and Q are maintained at the potentials of 10 V and -4 V respectively. The work done in moving 100 electrons from P to Q is

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NEET Mock Test - 7 - Question 25

The ratio of the radii of he planets X and Y is α . The ratio of acceleration due to gravity is β . The ratio of the escape velocities from their surfaces will be

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NEET Mock Test - 7 - Question 26

A uniform conductor of resistance R is cut into 20 equal parts. Half of them are joined in series and the remaining half of them in parallel. If the two combinations are joined in series, the effective resistance of all the pieces is

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NEET Mock Test - 7 - Question 27

A satellite which is geostationary in a particular orbit is taken to another orbit. Its distance from the centre of earth in the new orbit is 2 times that of earlier orbit. The time period in the second orbit is

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NEET Mock Test - 7 - Question 28

A 300 m long train is moving to north at a speed of 10 m/s. A bird flying towards south with a speed of 5 m/s crosses the train. The time taken by the bird to cross the train would be

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NEET Mock Test - 7 - Question 29

A point moves along a circle with speed v = ατ the total acceleration of the point at a time when it has traced 1/8th of the circumference is

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Centripetal acceleration

NEET Mock Test - 7 - Question 30

A capacitor of capacitance 1 μF is charged to 30 V and the battery is then disconnected. If it is connected across a 2 μF capacitor, the energy lost by the system is

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NEET Mock Test - 7 - Question 31

A particle is moving along a circular path of radius 10 m with a uniform speed 10 m/s. What will be the average acceleration when the particle completes half revolution?

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For half revolution

Change in velocity Δ V = 2 V and Time internal
∵ Average acceleration am

NEET Mock Test - 7 - Question 32

A block of mass m is suspended separately by two different springs and is having time periods T1 and T2 respectively. If same mass is connected to series combination of both springs, then its time period is

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Series combination for springs

NEET Mock Test - 7 - Question 33

There are three vectors  The unit vector along   is

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NEET Mock Test - 7 - Question 34

A small signal voltage V(t) = Vo sin ωt is applied across an ideal inductor L. Then

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In purely inductive ac circuit, voltage leads current by phase 90o

NEET Mock Test - 7 - Question 35

A beam of light of wavelength λ = 500 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The width of central maxima is

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Width of central maxima =

NEET Mock Test - 7 - Question 36

An electron in hydrogen atom makes a transition from n1 and n2. If the time period of electron in initial state is 27 times that in the final state then (Symbols have their usual meanings)

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NEET Mock Test - 7 - Question 37

Two identical heavy spheres of masses 102 kg and each of radius 10 cm have a separation 100 cm between their centres. The gravitational potential at the midpoint of line joining their centres is

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Gravitational potential

NEET Mock Test - 7 - Question 38

A  parallel plate capacitor is charged by abattery and then isolated from it. If distance between the two plates is now increased, then

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NEET Mock Test - 7 - Question 39

A black body is at temperature 700o C. It radiates thermal energy at the rate which is proportional to

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NEET Mock Test - 7 - Question 40

On an imaginary scale of temperature X, the freezing and boiling points of water are 42o X and 192o X respectively. What will be the temperature on X scale corresponding to a temperature 42o C on Celsius scale is

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NEET Mock Test - 7 - Question 41

An ideal heat engine operates in Carnot cycle between 227oC and 77oC. It absorbs 2 x 104 cal heat from source at high temperature. The amount of heat rejected to sink at lower temperature is

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NEET Mock Test - 7 - Question 42

Consider a long steel bar under a tensile stress due to forces F acting at the edges along the length of the bar as shown in the figure. The cross-sectional area of the rod is A. The shearing stress on plane aa’ making angle θ with the length, is

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NEET Mock Test - 7 - Question 43

A tuning fork of frequency 480 Hz is sounded on a resonance tube. The first and second resonance are observed at 16 cm and 50 cm respectively. The velocity of sound in air is approximately

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Use concept of resonance with correction.

NEET Mock Test - 7 - Question 44

Displacement of a particle executing S.H.M is x = 7(sin πt + cos πt). The maximum speed of the particle is (where x is in m and t in s)

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NEET Mock Test - 7 - Question 45

The self inductance L of a solenoid of length ℓ and area of cross-section A, for a fixed number of turns N will definitely decrease as

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NEET Mock Test - 7 - Question 46

The ratio of velocity of electron in 2nd to that in 4th excited state of Be3+ will be

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NEET Mock Test - 7 - Question 47

An example of tranquilizer is

NEET Mock Test - 7 - Question 48

Monomer of which of the following has atoms of only two different elements

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NEET Mock Test - 7 - Question 49

Number of units of glucose contained by amylase is

NEET Mock Test - 7 - Question 50

Most basic out of the following is

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No resonance and lone pair of electrons on sp3 hybridized N atom.

NEET Mock Test - 7 - Question 51

Consider the following reaction sequence

Select the incorrect statement in the following

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∵ R – X, involves nucleophilic substitution reaction via SN2 mechanism hance – R must be 1o – alkyl group not a phenyl group.

NEET Mock Test - 7 - Question 52

Identify the products A and B of the following reaction

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Iodoform reaction.

NEET Mock Test - 7 - Question 53

Select the compound which is most reactive towards SN2 reaction

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Rate of SN2 reaction will be faster when transition state is more stable.

NEET Mock Test - 7 - Question 54

In which of the following, gauche form is more stable than anti form of conformers?

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Gauche form can be more stable when intramolecular H-bonding occurs.

NEET Mock Test - 7 - Question 55

Which of the following will yield maximum terminal alkene?

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Terminal alkene will be less substituted and called Hoffmann product.
Poor leaving group and sterically hindered base will favour formation of maximum Hoffmann product.

NEET Mock Test - 7 - Question 56

The compound showing maximum number of geometrical isomers is

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More number of ligands

NEET Mock Test - 7 - Question 57

EAN rule is followed by

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EAN = 26- 2 + 6 x 2 =36

NEET Mock Test - 7 - Question 58

Aqueous CuSO4 solution is blue in colour. Which colour is absorbed by it ?

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Complementary colour

NEET Mock Test - 7 - Question 59

Which of the following elements can form square planar fluoride?

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XeF4 is square planner

NEET Mock Test - 7 - Question 60

Transition temperature of rhombic sulphur to monoclinic sulphur is

NEET Mock Test - 7 - Question 61

Which will have P-P bond?

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NEET Mock Test - 7 - Question 62

Least amount of carbon is present in

NEET Mock Test - 7 - Question 63

During electrophoresis of purple of cassius, the colloidal particles will

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Gold sol is negatively charged.

NEET Mock Test - 7 - Question 64

In a reaction, 64.2 M of reactant becomes 32.1 M in 20 second. After 30 second from the start of the reaction 16.05 M is left. The value of rate constant will be

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It is zero order reaction,

NEET Mock Test - 7 - Question 65

Which of the following relation is correct for an electrochemical cell?

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NEET Mock Test - 7 - Question 66

Correct comparison of ΔTb of the following (aqueous solution) is
1. 0.1 N NaCl
2. 0.1 N CaCl2
3. 0.1 N AlCl3
4. 0.1 N AI2 (SO)4

Detailed Solution for NEET Mock Test - 7 - Question 66

As no of ions increases, lowering of VP increases,

here,

NaCl = 2 ion

CaCl2​  = 3 ion

AlCl3   = 4 ions

and Al2​(SO4​)3​ = 5 ions

so, correct order is I > II > III > IV

NEET Mock Test - 7 - Question 67

Number of tetrahedral voids present on edges of hcp unit cell is

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NEET Mock Test - 7 - Question 68

The formation of photochemical smog does not involve

NEET Mock Test - 7 - Question 69

Magnetic moment of Fe2+ ion is

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Magnetic moment =
(n = no, of unpaired electrons)

Magnetic moment =

NEET Mock Test - 7 - Question 70

Which of the following oxides is most acidic?

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With the increase in oxidation number of central atom, acidic nature increases.

NEET Mock Test - 7 - Question 71

Van Arkel process for purification of impure Ti is represented by following scheme

Temperature T1 and T2 respectively are

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NEET Mock Test - 7 - Question 72

Which thermodynamic property is not correct for adsorption of gases o solid surface?

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During adsorption of gases on solid surface , entropy decreases.

NEET Mock Test - 7 - Question 73

If activation energy for forward direction is found to be greater than the backward direction for a reaction, then which of the following is always holds true?

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NEET Mock Test - 7 - Question 74

The van’t Hoff factor (i) for a dilute aqueous solution of the strong electrolyte Na3AIF6 is

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NEET Mock Test - 7 - Question 75