NEET-UG 2012 Question Paper — Set 2

The dimensions of (μ₀ε₀)⁻¹ᐟ² are

A stone is dropped from a height h. It hits the ground with a certain momentum P. If the same stone is dropped from a height 100% more than the previous height, the momentum when it hits the ground will change by:

A car of mass m is moving on a level circular track of radius R. If μs represents the static friction between the road and tyres of the car, the maximum speed of the car in circular motion is given by:

A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the car has a constant magnitude P₀. The instantaneous velocity of this car is proportional to:

Three masses are placed on the x-axis: 300 g at origin, 500 g at x = 40 cm and 400 g at x = 70 cm. The distance of the centre of mass from the origin is:

A circular platform is mounted on a frictionless vertical axle. Its radius R = 2 m and its moment of inertia about the axle is 200 kg m². It is initially at rest. A 50 kg man stands on the edge of the platform and begins to walk along the edge at the speed of 1 m s⁻¹ relative to the ground. Time taken by the man to complete one revolution is:

The moment of inertia of a uniform circular disc is maximum about an axis perpendicular to the disc and passing through

Which one of the following plots represents the variation of gravitational field on a particle with distance r due to a thin spherical shell of radius R? (r is measured from the centre of the spherical shell)

If vₑ is escape velocity and v₀ is orbital velocity of a satellite for orbit close to the earth’s surface, then these are related by :

A slab of stone of area 0.36 m² and thickness 0.1 m is exposed on the lower surface to steam at 100°C. A block of ice at 0°C rests on the upper surface of the slab. In one hour 4.8 kg of ice is melted. The thermal conductivity of slab is :
(Given latent heat of fusion of ice = 3.36 × 10⁵ J kg⁻¹.)

An ideal gas goes from state 4 to state B via three different processes as indicated in the P-V diagram :

If Q₁, Q₂, Q₃ indicate the heat absorbed by the gas along the three processes and ΔU₁, ΔU₂, ΔU₃ indicate the change in internal energy along the three processes respectively, then

The equation of a simple harmonic wave is given by

y = 3 sin (π/2) (50t − x)

Where x and y are in meters and t is in seconds. The ratio of maximum particle velocity to the wave velocity is

A train moving at a speed of 220 ms⁻¹ towards a stationary object, emits a sound of frequency 1000 Hz. Some of the sound reaching the object gets reflected back to the train as echo. The frequency of the echo as detected by the driver of the train is :
(speed of sound in air is 330 ms⁻¹)

Two metallic spheres of radii 1 cm and 3 cm are given charges of −1 × 10⁻² C and 5 × 10⁻² C, respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is :

A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the energy stored in the capacitor is :

Cell having an emf ε and internal resistance r is connected across a variable external resistance R. As the resistance R is increased, the plot of potential difference V across R is given by :

The power dissipated in the circuit shown in the figure is 30 Watts. The value of R is:

A proton carrying 1 MeV kinetic energy is moving in a circular path of radius R in uniform magnetic field. What should be the energy of an α-particle to describe a circle of same radius in the same field?

A magnetic needle suspended parallel to a magnetic field requires √3 J of work to turn it through 60°. The torque needed to maintain the needle in this position will be :

In a coil of resistance 10 Ω, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in Weber is :

The instantaneous values of alternating current and voltages in a circuit are given as

i = (1 / √2) sin(100πt) ampere

e = (1 / √2) sin(100πt + π / 3) Volt

The average power in Watts consumed in the circuit is

The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to :

A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its end closer to the pole is 20 cm away from the mirror. The length of the image is:

For the angle of minimum deviation of a prism to be equal to its refracting angle, the prism must be made of a material whose refractive index:

If the momentum of electron is changed by P, then the de Broglie wavelength associated with it changes by 0.5%. The initial momentum of electron will be:

Two radiations of photons energies 1 eV and 2.5 eV, successively illuminate a photosensitive metallic surface of work function 0.5 eV. The ratio of the maximum speeds of the emitted electrons is :

The transition from the state n = 3 to n =1 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from:

The half life of a radioactive nucleus is 50 days. The time interval (t₂ - t₁) between the time t₂ when 2 / 3 of it has decayed and the time t₁ when 1 / 3 of it had decayed is :

The input resistance of a silicon transistor is 100 Ω. Base current is changed by 40μA which results in a change in collector current by 2 mA. This transistor is used as a common emitter amplifier with a load resistance of 4 KΩ. The voltage gain of the amplifier is :

To get output 1 for the following circuit, the correct choice for the input is

The orbital angular momentum of p-electron is given as :

Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them:

During change of O₂ to O₂⁻ ion, the electron adds on which one of the following orbitals?

For real gases, van der Waals equation is written as

(p + an² / V²)(V - nb) = nRT

where ‘a’ and ‘b’ are van der Waals constants.
Two sets of gases are :
(I) O₂, CO₂, H₂ and He
(II) CH₄, O₂ and H₂
The gases given in set-I in increasing order of ‘b’ and gases given in set-II in decreasing order of ‘a’, are arranged below. Select the correct order from the following :

Equal volumes of two monoatomic gases, A and B, at same temperature and pressure are mixed. The ratio of specific heats (Cₚ / Cᵥ) of the mixture will be :

Given that the equilibrium constant for the reaction 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) has a value of 278 at a particular temperature. What is the value of the equilibrium constant for the following reaction at the same temperature ?
SO₃(g) ⇌ SO₂(g) + (1 / 2) O₂(g)

Given the reaction between 2 gases represented by A₂ and B₂ to give the compound AB(g).
A₂(g) + B₂(g) ⇌ 2AB(g)
At equilibrium, the concentration
of A₂ = 3.0 × 10⁻³ M
of B₂ = 4.2 × 10⁻³ M
of AB = 2.8 × 10⁻³ M
If the reaction takes place in a sealed vessel at 527°C, then the value of K_c will be :

Standard reduction potentials of the half reactions are given below :
F₂(g) + 2e⁻ → 2F⁻(aq); E° = +2.85 V
Cl₂(g) + 2e⁻ → 2Cl⁻(aq); E° = +1.36 V
Br₂(l) + 2e⁻ → 2Br⁻(aq); E° = +1.06 V
I₂(s) + 2e⁻ → 2I⁻(aq); E° = +0.53 V
The strongest oxidising and reducing agents respectively are :

Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?

Structure of a mixed oxide is cubic close-packed (c.c.p).The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is:

Vapour pressure of chloroform (CHCl₃) and dichloromethane (CH₂Cl₂) at 25°C are 200 mm Hg and 41.5 mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5 g of CHCl₃ and 40 g of CH₂Cl₂ at the same temperature will be : (Molecular mass of CHCl₃ = 119.5 u and molecular mass of CH₂Cl₂ = 85 u).

Molar conductivities (Λₘ°) at infinite dilution of NaCl, HCl and CH₃COONa are 126.4, 425.9 and 91.0 S cm² mol⁻¹ respectively. Λₘ° for CH₃COOH will be:

In which of the following arrangements the given sequence is not strictly according to the property indicated against it?

Which one of the following does not correctly represent the correct order of the property indicated against it?

Four successive members of the first series of the transition metals are listed below. For which one of them the standard reduction potential (E°_M²⁺/M) value has a positive sign?

The catalytic activity of transition metals and their compounds is ascribed mainly to :

Which of the following exhibit only +3 oxidation state ?

Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal Ni(II). Which of following statements is not true?

Low spin complex of d⁶-cation in an octahedral field will have the following pairing energy :

(Δ₀ = Crystal Field Splitting Energy in an octahedral field, P = Electron pairing energy)

Consider the following reaction :

The product 'A' is :

Consider the reaction :
RCHO + NH₂NH₂ → RCH = N — NH₂
What sort of reaction is it ?

An organic compound (C₃H₉N) (A), when treated with nitrous acid, gave an alcohol and N₂ gas evolved. (A) on warming with CHCl₃ and caustic potash gave (C) which on reduction gave isopropylmethylamine. Predict the structure of (A).

Which one of the following sets forms the biodegradable polymer?

Chloroamphenicol is an :

A certain gas takes three times as long to effuse out as helium. Its molecular mass will be :

In the replacement reaction

The reaction will be most favourable if M happens to be:

The Gibbs' energy for the decomposition of Al₂O₃ at 500°C is as follows:

(2 / 3)Al₂O₃ → (4 / 3)Al + O₂ ; ΔᵣG = + 960 kJ mol⁻¹

The potential difference needed for the electrolytic reduction of aluminium oxide (Al₂O₃) at 500°C is at least:

Which of the following compounds can be used as antifreeze in automobile radiators?

Which one of the following organisms is scientifically correctly named, according to the International Rules of Nomenclature and correctly described?

How many organisms in the list given below are autotrophs?
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosomes, Porphyra, Wolffia

In the five-kingdom classification, Chlamydomonas and Chlorella have been included in

Read the following statements (A-E) and answer the question.

(A) In Equisetum the female gametophyte is retained on the parent sporophyte.
(B) In Ginkgo male gametophyte is not independent.
(C) The sporophyte in Riccia is more developed than that in Polytrichum.
(D) Sexual reproduction in Volvox is isogamous.
(E) The spores of slime molds lack cell walls.

How many of the above statements are correct?

Which one of the following pair is wrongly matched?

Which one of the following pairs of animals are similar to each other pertaining to the features stated against them?

Which one of the following categories of animals, is correctly described with no signle exception in it?

How many plants in the list given below have marginal placentation?
Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin

Which one of the following organisms is correctly matched with its three characteristics?

As compared to a dicot root, a monocot root has

Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labeled A, B, C and D, and select the correct answer from the given option.

The supportive skeletal structures in the human external ears and in the nose tip are examples of

The four sketches (1, 2, 3 and 4) given below, represent four different types of animal tissues. Which one of these is correctly identified in the options given, along with its correct location and function?

Which one of the following structures is an Organelle within an organelle?

Which one of the following cellular parts is correctly described?

Which one of the following biomolecules is correctly characterized?

Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres?

For its activity, carboxypeptidase requires

Read the following four statements (A-D).

(A) Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.

(B) In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth.

(C) Stamens in flowers of Gloriosa and Petunia are polyandrous.

(D) Symbiotic nitrogen-fixers occur in free-living state also in soil.

How many of the above statements are correct?

For its action, nitrogenase requires

Which one of the following generally acts as an antagonist to gibberellins?

Through their effect on plant growth regulators, what do the temperature and light control in the plants?

Vernalization stimulates flowering in

Where do certain symbiotic micro-organisms normally occur in human body?

Which one of the following options gives the correct categorization of six animals according to the type of nitrogenous wastes (A, B, C), they give out?

Which one of the following characteristics is common to both in humans and adult frogs?

Which one of the following pairs of chemical substances is correctly categorized?

What is the function of germ pore?

Which one of the following statements is wrong?

Plants with ovaries having only one or a few ovules, are generally pollinated by

The secretory phase in the human menstrual cycle is also called

Identify the human developmental stage shown below as well as the related right place of its occurrence in a normal pregnant woman,and select the right option for the two together.

A Test cross is carried out to

Which one of the following is a wrong statement regarding mutations?

Represented below is the inheritance pattern of a certain type of traits in humans.

Which one of the following conditions could be an example of this pattern?

Read the following four statements (A–D).

(A) In transcription, adenosine pairs with uracil.
(B) Regulation of lac operon by repressor is referred to as positive regulation.
(C) The human genome has approximately 50,000 genes.
(D) Haemophilia is a sex-linked recessive disease.

How many of the above statements are correct?

Which of the following forms the basis of DNA Finger printing?

The idea of mutations was brought forth by

Read the following four statements (A–D).

(A) Colostrum is recommended for the new born because it is rich in antigens.
(B) Chikungunya is caused by a Gram negative bacterium.
(C) Tissue culture has proved useful in obtaining virus-free plants.
(D) Beer is manufactured by distillation of fermented grape juice.

How many of the above statements are wrong?

Which one of the following statements is correct with respect to immunity?

Which one of the following sets of items in the options 1–4 are correctly categorized with one exception in it?

Identify the molecules (a) and (b) shown below and select the right option giving their source and use.

Green revolution in India occurred during

Consider the following four statements (A–D) and select the option which includes all the correct ones only.

(1) Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins etc.

(2) Body weight-wise the micro-organism Methylophilus methylotrophus may be able to produce several times more proteins than the cows per day.

(3) Common button mushrooms are a very rich source of vitamin C.

(4) A rice variety has been developed which is very rich in calcium.

The domestic sewage in large cities

In gobar gas, the maximum amount is that of

Which one of the following represents a palindromic sequence in DNA?

Biolistics (gene-gun) is suitable for

In genetic engineering, the antibiotics are used

The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents?

Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells)

The first clinical gene therapy was given for treating

Cuscuta is an example of

The rate of formation of new organic matter by rabbit in a grassland, is called

The second stage of hydrosere is occupied by plants like

Identify the likely organisms (1), (2), (3) and (4) in the food web shown below.

Sacred groves are specially useful in

Select the correct statement about bio-diversity.

Which one of the following is a wrong statement regarding mutations?

A test cross is carried out to

A particle has initial velocity (2î + 3ĵ) and acceleration (0.3î + 0.2ĵ). The magnitude of velocity after 10 seconds will be:

A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45°, the speed of the car is: