NEET-UG 2010 Question Paper

The number of atoms in 0.1 mol of a triatomic gas is: (N_A = 6.02 × 10²³ mol⁻¹)

Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl?

The correct order of increasing ionic radii among the following isoelectronic species are:

In which one of the following species the central atom has the type of hybridization which is not the same as that present in the other three?

In which of the following pairs of molecules/ions, the central atoms have sp² hybridization?

Which one of the following species does not exist under normal conditions?

Standard entropies of X₂, Y₂ and XY₃ are 60, 40 and 50 JK⁻¹ mol⁻¹, respectively.

(1 / 2) X₂ + (3 / 2)Y₂ ⇌ XY₃, ΔH = −30 kJ

to be at equilibrium, the temperature should be:

In which of the following equilibrium K_c and Kₚ are not equal?

Which one of the following molecular hydrides acts as a Lewis acid?

If pH of a saturated solution of Ba(OH)₂ is 12, the value of its K_sp is:

What is [H⁺] in mol/L of a solution that is 0.20 M in CH₃COONa and 0.10 M in CH₃COOH? (For CH₃COOH, Kₐ = 1.8 × 10⁻⁵)

In a buffer solution containing equal concentration of B⁻ and HB, the K_b for B⁻ is 10⁻¹⁰. The pH of the buffer solution is:

Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?

Property of the alkaline earth metals that increases with their atomic number:

The tendency of BF₃, BCl₃ and BBr₃ to behave as Lewis acid decreases in the sequence:

In the following the most stable conformation of n-butane is:

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by :

Which one is most reactive towards electrophilic reagent?

AB crystallizes in a body centred cubic lattice with edge length 'a' = 387 pm. The distance between two oppositely charged ions in the lattice is:

25.3 g of sodium carbonate, Na₂CO₃, is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ions, Na⁺, and carbonate ions, CO₃²⁻, are respectively. (Molar mass of Na₂CO₃ = 106 g mol⁻¹)

An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?

A solution of sucrose (molar mass = 342 g mol⁻¹) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained will be (K_f for water = 1.86 K kg mol⁻¹):

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to:

For the reduction of silver ions with copper metal, the standard cell potential was found to be +0.46 V at 25°C. The value of standard Gibbs energy, ΔG°, will be: (F = 96500 C mol⁻¹)

For the reaction [N₂O₅(g) → 2NO₂ (g) + 1/2O₂(g)] the value rate of disappearance of N₂O₅ is given as 6.25 × 10⁻³ mol L⁻¹ s⁻¹. The rate of formation of NO₂ and O₂ is given respectively as:

During the kinetic study of the reaction, 2A + B → C + D following results were obtained:

For an endothermic reaction, energy of activation is Eₐ and enthalpy of reaction is ΔH (both of these in kJ mol⁻¹). Minimum value of Eₐ will be:

Oxidation states of P in H₄P₂O₅, H₄P₂O₆, and H₄P₂O₇ are respectively:

Which one of the following compounds is a peroxide?

The correct order of increasing bond angles in the following species is:

Which of the following ions will exhibit colour in aqueous solutions?

Which one of the following ions has electronic configuration [Ar] 3d⁶?

(At. Nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)

Which one of the following pairs has the same size?

The existence of two different coloured complexes with the composition [Co(NH₃)₄Cl₂]⁺ is due to:

Which one of the following complex ions is not expected to absorb visible light?

Crystal field stabilization energy for high-spin d⁴ octahedral complex is:

The reaction of toluene with Cl₂ in presence of FeCl₃ gives 'X' and reaction in presence of light gives 'Y'. Thus, 'X' and 'Y' are:

Which one is most reactive towards S_N1 reaction?

The correct order of increasing reactivity of C - X bond towards nucleophile in the following compounds is

Which one of the following compounds has the most acidic nature?

Which of the following reactions will not result in the formation of carbon–carbon bonds?

In a set of reactions, ethylbenzene yielded a product D.

Given are cyclohexanol (I), acetic acid (II), 2,4,6-trinitrophenol (III) and phenol (IV). In these, the order of decreasing acidic character will be:

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is:

Which of the following statements about primary amines is False?

Acetamide is treated with the following reagents separately. Which one of these would yield methylamine?

Aniline in a set of the following reactions yielded a coloured product ‘Y’

The structure of ‘Y’ would be ;

Which one of the following does not exhibit the phenomenon of mutarotation ?

Which one of the following is employed as a tranquilizer drug?

Which of the following structures represents neoprene polymer?

Single-celled eukaryotes are included in:

Membrane-bound organelles are absent in:

Virus envelope is known as:

Algae have cell wall made up of:

Some hyperthermophilic organisms that grow in highly acidic (pH₂) habitats belong to the two groups:

Male and female gametophytes are independent and free-living in:

Which one of the following kinds of animals are triploblastic?

One example of animals having a single opening to the outside that serves both as mouth as well as anus is:

Which one of the following statements about certain given animals is correct?

Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct?

In a unilocular ovary with a single ovule, the placentation is:

Ovary is half-inferior in the flowers of:

The technical term used for the androecium in a flower of China rose (Hibiscus rosa-sinensis) is:

Keel is characteristic of the flowers of:

The chief water conducting elements of xylem in gymnosperms are:

Which one of the following is not a lateral meristem?

Heartwood differs from sapwood in:

The kind of epithelium which forms the inner walls of blood vessels is:

Which one of the following structures between two adjacent cells is an effective transport pathway?

Which one of the following has its own DNA?

The main arena of various types of activities of a cell is:

The plasma membrane consists mainly of:

During mitosis, ER and nucleolus begin to disappear at:

Which stages of cell division do the following figures A and B represent respectively?

Which one of the following is not a micronutrient?

An element playing important role in nitrogen fixation is:

One of the free-living, anaerobic nitrogen-fixer is:

PGA as the first CO₂ fixation product was discovered in photosynthesis of:

C₄ plants are more efficient in photosynthesis than C₃ plants due to:

The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called:

Coiling of garden pea tendrils around any support is an example of:

Phototropic curvature is the result of uneven distribution of:

Photoperiodism was first characterised in:

If for some reason our goblet cells are non functional, this will adversely affect:

Listed below are four respiratory capacities (i–iv) and four jumbled respiratory volumes of a normal human adult:

Which one of the following is the correct matching of two capacities and volumes?

Which two of the following changes (a–d) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)?

(i) Increase in red blood cell size
(ii) Increase in red blood cell production
(iii) Increased breathing rate
(iv) Increase in thrombocyte count

Changes occurring are:

ABO blood groups in humans are controlled by the gene I. It has three alleles—Iᴬ, Iᴮ and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

What is true about RBCs in humans?

If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

Which one of the following statements in regard to the excretion by the human kidneys is correct?

The principal nitrogenous excretory compound in humans is synthesised:

Consider the following four statements (i–iv) regarding kidney transplant and select the two correct ones out of these.

(i) Even if a kidney transplant is proper, the recipient may need to take immune suppresants for a long time.

(ii) The cell-mediated immune response is responsible for graft rejection.

(iii) The B lymphocytes are responsible for rejection of the graft.

(iv) The acceptance or rejection of a kidney transplant depends only on specific interferons.

The two correct statements are:

Low Ca⁺⁺ in the body fluid may be the cause of:

The nerve centres which control the body temperature and the urge for eating are contained in:

Injury to adrenal cortex is not likely to affect the secretion of which one of the following?

Which one of the following pairs is incorrectly matched?

Toxic agents present in food which interfere with thyroxine synthesis lead to the development of:

Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called

Wind pollinated flowers are

Apomictic embryos in citrus arise from

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?

Sertoli cells are found in

Vasa efferentia are the ductules leading from

Seminal plasma in human males is rich in :

Which one of the following statements about human sperm is correct?

The part of fallopian tube closest to the ovary is

The second maturation division of the mammalian ovum occurs

In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube?

The signals for parturition originate from

The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?

Which one of the following statements about morula in humans is correct?

Cu ions released from copper-releasing Intra Uterine Devices (IUDs):

The permissible use of the technique amniocentesis is for:

Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?

The genotype of a plant showing the dominant phenotype can be determined by:

Select the correct statement from the ones given below with respect to dihybrid cross.

Which one of the following symbols and its representation, used in human pedigree analysis, is correct?

Infectious proteins are present in:

Which one of the following does not follow the central dogma of molecular biology?

The one aspect which is not a salient feature of genetic code, is its being:

Select the two correct statements out of the four (a–d) given below about lac operon.

(i) Glucose or galactose may bind with the repressor and inactivate it.

(ii) In the absence of lactose the repressor binds with the operator region.

(iii) The Z-gene codes for permease.

(iv) This was elucidated by Francois Jacob and Jacque Monod.

The correct statements are:

Satellite DNA is useful tool in:

Darwin’s finches are a good example of:

Widal test is used for the diagnosis of:

Ringworm in humans is caused by:

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

Select the correct statement from the ones given below?

Breeding of crops with high levels of minerals, vitamins and proteins is called

An improved variety of transgenic basmati rice

A common biocontrol agent for the control of plant diseases is

The common nitrogen fixer in paddy fields is

Which one of the following is not used in organic farming

Select the correct statement from the following

Which one of the following is used as vector for cloning genes info higher organisms?

DNA or RNA segment tagged with a radioactive molecule is called:

Restriction endonucleases are enzymes which:

Stirred tank bioreactors have been designed for:

Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzyme?

The genetically-modified (GM) brinjal in India has been developed for:

Some of the characteristics of Bt cotton are:

Genetic engineering has been successfully used for producing:

The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do a, b and c represent respectively?

Which one of the following is one of the characteristics of a biological community?

The biomass available for consumption by the herbivores and the decomposers is called:

Study the four statements (i–iv) given below and select the two correct ones out of them:

(i) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers.

(ii) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates.

(iii) Predators ultimately lead to the extinction of prey species.

(iv) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders.

The two correct statements are:

Which one of the following is an example of Exsitu conservation?

dB is a standard abbreviation used for the quantitative expression of:

A renewable exhaustible natural resource is:

The two gases making highest relative contribution to the greenhouse gases are:

Carrier ions like Na⁺ facilitate the absorption of substances like:

The dimension of (1 / 2)ε₀E², where ε₀ is permittivity of free space and E is electric field, is:

A particle has initial velocity (3î + 4ĵ) and has acceleration (0.4î + 0.3ĵ). It's speed after 10 s is:

A particle moves a distance x in time t according to the equation x = (t+5)⁻¹. The acceleration of the particle is proportional to:

A ball is dropped from a high-rise platform at t = 0 starting from rest. After 6 seconds, another ball is thrown downwards from the same platform with a speed v. The two balls meet at t = 18 s. What is the value of v? (Take g = 10 m/s²)

A man of 50 kg mass is standing in a gravity-free space at a height of 10 m above the floor. He throws a stone of 0.5 kg mass downwards with a speed of 2 m/s. When the stone reaches the floor, the distance of the man above the floor will be:

Six vectors, 𝐚⃗ through 𝐟⃗ have the magnitudes and directions indicated in the figure. Which of the following statements is true?

A block of mass m is in contact with the cart C as shown in the Figure.

The coefficient of static friction between the block and the cart is μ. The acceleration α of the cart that will prevent the block from falling satisfies:

An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m. What is the power of the engine?

A ball moving with velocity 2 m/s collides head-on with another stationary ball of double the mass. If the coefficient of restitution is 0.5, then their velocities (in m/s) after collision will be:

Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system will be:

A circular disk of moment of inertia Iₜ is rotating in a horizontal plane, its symmetry axis, with a constant angular speed ωᵢ. Another disk of moment of inertia I_b is dropped coaxially onto the rotating disk. Initially the second disk has zero angular speed. Eventually both the disks rotate with a constant angular speed ω_f. The energy lost by the initially rotating disk to friction is:

A particle of mass M is situated at the centre of a spherical shell of same mass and radius a. The gravitational potential at a point situated at a / 2 distance from the centre, will be:

The radii of circular orbits of two satellites A and B of the Earth are 4R and R, respectively. If the speed of satellite A is 3 V, the speed of satellite B will be:

A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat Q in time t. The metallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat conducted by the new rod, when placed in thermal contact with the two reservoirs, in time t?

The total radiant energy per unit area, normal to the direction of incidence, received at a distance R from the centre of a star of radius r, whose surface radiates as a black body at a temperature T K is given by:

(where σ is Stefan's constant)

If ΔU and ΔW represent the increase in internal energy and work done by the system respectively in a thermodynamical process, which of the following is true?

The displacement of a particle along the x-axis is given by x = a sin²(ωt). The motion of the particle corresponds to:

The period of oscillation of a mass M suspended from a spring of negligible mass is T. If along with it another mass M is also suspended, the period of oscillation will now be:

A transverse wave is represented by y = Asin(ωt − kx). For what value of the wavelength is the wave velocity equal to the maximum particle velocity?

A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per second when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was:

Two positive ions, each carrying a charge q, are separated by a distance d. If F the force of repulsion between the ions, the number of electrons missing from each ion will be (e being the charge of an electron):

A square surface of side L meter in the plane of the paper is placed in a uniform electric field E (volt/m) acting along the same plane at an angle θ with the horizontal side of the square as shown in the figure. The electric flux linked to the surface, in units of volt·m, is:

A series combination of n₁ capacitors, each of value C₁, is charged by a source of potential difference 4 V. When another parallel combination of n₂ capacitors, each of value C₂, is charged by a source of potential difference V, it has the same (total) energy stored in it, as the first combination has. The value of C₂, in terms of C₁, is then

In producing chlorine by electrolysis 100 kW power at 125 V is being consumed. How much chlorine per minute is liberated? (E.C.E. of chlorine is 0.367×10⁻⁶ kg/C)

Consider the following two statements:

(A) Kirchhoff's junction law follows from the conservation of charge.

(B) Kirchhoff's loop law follows from the conservation of energy.

Which of the following is correct?

A potentiometer circuit is set up as shown. The potential gradient across the potentiometer wire is k volt/cm and the ammeter, present in the circuit, reads 1.0 A when two way key is switched off. The balance points, when the key between the terminals (i) 1 and 2 (ii) 1 and 3 is plugged in, are found to be at lengths l₁ cm and l₂ cm, respectively.

The magnitudes of the resistors R and X, in ohms, are then equal, respectively, to

Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the centre of the ring is

A circular coil ABCD carrying a current i is placed in a uniform magnetic field. If the magnetic force on the segment AB is 𝐅⃗, the force on the remaining segment BCDA is:

A galvanometer has a coil of resistance 100 Ω and gives a full-scale deflection for 30 mA current. It is to work as a voltmeter of 30 volt range, the resistance required to be added will be:

Electromagnets are made of soft iron because soft iron has:

A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of 2 sec in Earth's horizontal magnetic field of 24 microtesla. When a horizontal field of 18 microtesla is produced opposite to the earth's field by placing a current-carrying wire, the new time period of magnet will be:

A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T, with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm s⁻¹. The induced e.m.f. when the radius is 2 cm, is

In the given circuit, the reading of voltmeter V₁ and V₂ are 300 volts each. The reading of the voltmeter V₃ and ammeter A are respectively:

A 220 volt input is supplied to a transformer. The output circuit draws a current of 2.0 ampere at 440 volts. If the efficiency of the transformer is 80%, the current drawn by the primary windings of the transformer is:

Which one of the following statements is false for the properties of electromagnetic wave?

A ray of light travelling in a transparent medium of refractive index μ, falls on a surface separating the medium from air at an angle of incidence of 45°. For which of the following values of μ the ray can undergo total internal reflection?

A lens having focal length f and aperture of diameter d forms an image of intensity I. Aperture of diameter d/2 in the central region of the lens is covered by a black paper. Focal length of lens and intensity of image now will be respectively:

A source S₁ is producing 10¹⁵ photons per second of wavelength 5000 Å. Another source S₂ is producing 1.02 × 10¹⁵ photons per second of wavelength 5100 Å. Then, (power of S₂) (power of S₁) is equal to:

The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work function 5.01 eV, when ultraviolet light of 200 nm falls on it, must be:

An alpha nucleus of energy (1 / 2)mv² bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to:

The energy of hydrogen atom in the ground state is −13.6 eV. The energy of a He⁺ ion in the first excited state will be:

The mass of a ⁷₃​Li nucleus is 0.042 u less than the sum of the masses of all its nucleons. The binding energy per nucleon of the ⁷₃​Li nucleus is nearly:

The activity of a radioactive sample is measured as N₀ counts per minute at t = 0 and N₀/e counts per minute at t = 5 minutes. The time (in minutes) at which the activity reduces to half its value is:

Which one of the following statement is FALSE?

Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point?

A common emitter amplifier has a voltage gain of 50, an input impedance of 100 Ω and an output impedance of 200 Ω. The power gain of the amplifier is:

The device that can act as a complete electronic circuit is:

A beam of cathode rays is subjected to crossed electric (E) and magnetic field (B). The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by:

(where V is the potential difference between cathode and anode.)

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

A gramophone record is revolving with an angular velocity ω. A coin is placed at a distance r from the centre of the record. The static coefficient of friction is μ. The coin will revolve with the record if