NEET-UG 2007 Question Paper

Dimensions of resistance in an electrical circuit, in terms of dimension of mass [M], of length [L], of time [T] and of current [I], would be

A car moves from X to Y with a uniform speed v_u and returns to Y with a uniform speed v_d. The average speed for this round trip is

The position x of a particle with respect to time t along x-axis is given by x = 9t² - t³ where x is in metres and t in second. What will be the position of this particle when it achieves maximum speed along the +ve x direction?

A particle moving along x-axis has acceleration f, at time t, given by f = f_0 (1 - t/T), where f_0 and T are constants. The particle at t = 0 has zero velocity. In the time interval between t = 0 and the instant when f = 0, the particle's velocity (v_x) is

𝐀⃗ and 𝐁⃗ are two vectors and θ is the angle between them, if | 𝐀⃗ x 𝐁⃗| = √3( 𝐀⃗ . 𝐁⃗ ), the value of θ is

A particle starting from the origin (0, 0) moves in the (x, y) plane. Its coordinates at a later time are (√3, 3). The path of the particle makes with the x-axis an angle of

A block B is pushed momentarily along a horizontal surface with an initial velocity V. If μ is the coefficient of sliding friction between B and the surface, block B will come to rest after a time

A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring so that the spring is compressed by a distance d. The net work done in the process is

A wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00 rad/sec. In a time of 2 sec it has rotated through an angle (in radian) of

A uniform rod AB of length l, and mass m is free to rotate about point A. The rod is released from rest in the horizontal position. Given that the moment of inertia of the rod about A is ml²/3, the initial angular acceleration of the rod will be

A particle of mass m moves in the XY plane with a velocity v along the straight line AB. If the angular momentum of the particle with respect to origin O is L_A when it is at A and L_B when it is at B, then

Two satellites of earth, S₁ and S₂ are moving in the same orbit. The mass of S₁ is four times the mass of S₂. Which one of the following statements is true?

If the cold junction of a thermo-couple is kept at 0°C and the hot junction is kept at T°C then the relation between neutral temperature (T_n) and temperature of inversion (T_i) is

A black body is at 727°C. It emits energy at a rate which is proportional to

Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature t°C, the power received by a unit surface, (normal to the incident rays) at a distance R from the centre of the sun is

An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62°C, its efficiency is doubled. Temperature of the source is

The phase difference between the instantaneous velocity and acceleration of a particle executing simple harmonic motion is

The particle executing simple harmonic motion has a kinetic energy K_0 cos² ωt. The maximum values of the potential energy and the total energy are respectively

A mass of 2.0 kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in the figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes a simple harmonic motion. The spring constant is 200 N/m. What should be the minimum amplitude of the motion so that the mass gets detached from the pan (take g = 10 m/s²)?

A particle executes simple harmonic oscillation with an amplitude a. The period of oscillation is T. The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is

Three point charges +q, -q and +q are placed at points (x = 0, y = a, z = 0), (x = 0, y = 0, z = 0) and (x = a, y = 0, z = 0) respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are

A hollow cylinder has a charge q coulomb within it. If φ is the electric flux in units of voltmeter associated with the curved surface B, the flux linked with the plane surface A in units of voltmeter will be

Charges +q and -q are placed at points A and B respectively which are a distance 2L apart, C is the midpoint between A and B. The work done in moving a charge +Q along the semicircle CRD is

Two condensers, one of capacity C and other of capacity C/2 are connected to a V-volt battery, as shown.

The work done in charging fully both the condensers is

A steady current of 1.5 amp flows through a copper voltameter for 10 minutes. If the electrochemical equivalent of copper is 30 × 10⁻⁵ g coulomb⁻¹, the mass of copper deposited on the electrode will be

The total power dissipated in watts in the circuit shown here is

Three resistances P, Q, R each of 2Ω and an unknown resistance S form the four arms of a Wheatstone bridge circuit. When a resistance of 6Ω is connected in parallel to S the bridge gets balanced. What is the value of S?

A beam of electron passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move

In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential V and then made to describe semicircular path of radius R using a magnetic field B. If V and B are kept constant, the ratio (charge on the ion / mass of the ion) will be proportional to

A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associated magnetic moment μ is given by

Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius R with constant speed v. The time period of the motion

The resistance of an ammeter is 13 Ω and its scale is graduated for a current upto 100 amps. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 amperes by this meter. The value of shunt-resistance is

Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show

What is the value of inductance L for which the current is maximum in a series LCR circuit with C = 10 μF and ω = 1000 s⁻¹?

The primary and secondary coil of a transformer have 50 and 1500 turns respectively. If the magnetic flux φ linked with the primary coil is given by φ = φ_0 + 4t, where φ is in webers, t is time in seconds and φ_0 is a constant, the output voltage across the secondary coil is

A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 amp, the efficiency of the transformer is approximately

The electric and magnetic field of an electro-magnetic wave are

The frequency of a light wave in a material is 2 × 10¹⁴ Hz and wavelength is 5000 Å. The refractive index of material will be

A small coin is resting on the bottom of a beaker filled with liquid. A ray of light from the coin travels upto the surface of the liquid and moves along its surface. How fast is the light travelling in the liquid?

Monochromatic light of frequency 6.0 × 10¹⁴ Hz is produced by a laser. The power emitted is 2 × 10⁻³ W. The number of photons emitted, on the average, by the sources per second is

Biological organisation starts with

The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for

ICBN stands for

Which one of the following statements about mycoplasma is wrong?

Which one of the following is a slime mould?

Which pair of the following belongs to Basidiomycetes?

Ergot of rye is caused by species of of

If you are asked to classify the algae into distinct groups, which of the following characters you should choose?

Spore dissemination in some liverworts is aided by

In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result

Flagellated male gametes are present in all the three of which one of the following sets?

In gymnosperms, the pollen chamber represents

What is true about Nereis, scorpion, cockroach and silver fish?

Which one of the following is a matching pair of a body feature and the animal possessing it?

Which of the following pairs are correctly matched?
Animals – Morphological features
(i) Crocodile – 4-chambered heart
(ii) Sea urchin – Parapodia
(iii) Obelia – Thecodont
(iv) Lemur – Thecodont

Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing micro-organism

Passage cells are thin walled cells found in

For a critical study of secondary growth in plants, which one of the following pairs is suitable?

In which one of the following preparations are you likely to come across cell junctions most frequently?

Select the wrong statement from the following

Which one of the following is not a constituent of cell membrane?

A 5 watt source emits monochromatic light of wavelength 5000 Å. When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1.0 m, the number of photoelectrons liberated will be reduced by a factor of

About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

The total energy of electron in the ground state of hydrogen atom is -13.6 eV. The kinetic energy of an electron in the first excited state is

If the nucleus ²⁷₁₃ Al has nuclear radius of about 3.6 fm, then ¹²⁵₃₂Te would have its radius approximately as

Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will

A plant requires magnesium for

A nucleus ᴬ_Z X has mass represented by M(A, Z). If M_p and M_n denote the mass of proton and neutron respectively and B.E. the binding energy in MeV, then

Which one of the following elements is not an essential micronutrient for plant growth?

Two radioactive substances A and B have decay constants 5λ and λ respectively. At t = 0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1/e)² after a time interval

In a radioactive decay process, the negatively charged emitted β-particles are

The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is

For a cubic crystal structure which one of the following relations indicating the cell characteristics is correct?

The wavelength of light absorbed by Pr form of phytochrome is

In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is

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

In the leaves of C₄ plants, malic acid formation during CO ₂ fixation occurs in the cells of

In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table

The C₄ plants have photosynthetic efficiency more than C₃ plants because

All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membrane in eukaryotes and in cytosol in prokaryotes. This enzyme is

The overall goal of glycolysis, krebs cycle and the electron transport system is the formation of

Opening of floral buds into flowers, is a type of

Which one of the following pairs, is not correctly matched?

The number of moles of KMnO₄ that will be needed to react with one mole of sulphite ion in acidic solution is

Identify the correct order of the size of the following:

An element, X has the following isotopic composition:

²⁰⁰X : 90%

¹⁹⁹X : 8.0%

²⁰²X : 2.0%

The weighted average atomic mass of the naturally occuring element X is closest to

In which of the following pairs, the two species are isostructural?

Concentrated aqueous sulphuric acid is 98% H₂SO₄ by mass and has a density of 1.80 g mL⁻¹. Volume of acid required to make one litre of 0.1M H₂SO₄ solution is

The correct order of C-O bond length among CO, CO₃²⁻, CO₂ is

Consider the following sets of quantum numbers:

Which of the following sets of quantum number is not possible?

Consider the following reactions:

Enthalpy of formation of H₂O (l) is

Which one of the following ionic species has the greatest proton affinity to form stable compound?

Which of the following electronic configuration of an atom has the lowest ionisation enthalpy?

Given that bond energies of H - H and Cl - Cl are 430 kJ mol⁻¹ and 240 kJ mol⁻¹ respectively and ΔH_f for HCl is -90 kJ mol⁻¹, bond enthalpy of HCl is

The order of decreasing reactivity towards an electrophilic reagent, for the following would be

(i) benzene

(ii) toluene

(iii) chlorobenzene

(iv) phenol

The following equilibrium constants are given:

N₂ + 3H₂ ⇌ 2NH₃; K₁

N₂ + O₂ ⇌ 2NO; K₂

H₂ + (1/2)O₂ ⇌ H₂O; K ₃

The equilibrium constant for the oxidation of 2 moles NH₃ by oxygen to give NO is

Calculate the pOH of a solution at 25°C that contains 1 * 10⁻¹⁰ M of hydronium ions, i.e. H₃O⁺.

A weak acid, HA, has a Kₐ of 1.00 × 10⁻⁵. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to

The fraction of total volume occupied by the atoms present in a simple cube is

The correct order of increasing thermal stability of K₂CO₃, MgCO₃, CaCO₃ and BeCO₃ is

If NaCl is doped with 10⁻⁴ mol % of SrCl₂, the concentration of cation vacancies will be (N_A = 6.02 × 10²³ mol⁻¹)

In which of the following the hydration energy is higher than the lattice energy?

0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If K_f for water is 1.86 K kg mol⁻¹, the lowering in freezing point of the solution is

Which of the compounds with molecular formula C₅H₁₀ yields acetone on ozonolysis?

The equilibrium constant of the reaction:

Cu(s) + 2Ag⁺(aq) ⟶ Cu²⁺(aq) + 2Ag(s) ; E° = 0.46 V at 298 K is

Predict the product C obtained in the following reaction of butyne-1.

The efficiency of a fuel cell is given by

Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offer an exception and concentrated by chemical leaching?

The reaction of hydrogen and iodine monochloride is given as:

H₂(g) + 2ICl(g) ⟶ 2HCl(g) + I₂(g)

The reaction is of first order with respect to H₂(g) and ICl(g), following mechanisms were proposed.

Mechanism A:

H₂(g) + 2ICl(g)⟶ 2HCl(g) + I₂(g)

Mechanism B:

H₂(g) + ICl(g) ⟶ HI(g); slow

HI(g) + ICl(g) ⟶ HCl(g) + I₂(g); fast

Which of the above mechanism(s) can be consistent with the given information about the reaction?

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

In a first-order reaction A ⟶ B, if k is rate constant and initial concentration of the reactant A is 0.5 M, then the half-life is

Which one of the following ions is the most stable in aqueous solution?

If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately (log 4 = 0.60, log 5 = 0.69)

Identify the incorrect statement among the following:

The Langmuir adsorption isotherm is deduced using the assumption:

Which of the following will give a pair of enantiomorphs?

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

The d electron configurations of Cr²⁺, Mn²⁺, Fe²⁺ and Ni²⁺ are 3d⁴, 3d⁵, 3d⁶ and 3d⁸ respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?

(At. No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)

If there is no rotation of plane polarised light by a compound in a specific solvent, though to be chiral, it may mean that

The product formed in Aldol condensation is

CH₃ - CHCl - CH₂ - CH₃ has a chiral centre. Which one of the following represents its R-configuration?

Consider the following compounds.

The correct decreasing order of their reactivity towards hydrolysis is

For (i) I⁻, (ii) Cl⁻, (iii) Br⁻, the increasing order of nucleophilicity would be

Which of the following represents the correct order of the acidity in the given compounds?

In the reaction:

Which of the following compounds will be formed?

Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called

RNA and DNA are chiral molecules, their chirality is due to

Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid?

Which of the following is water-soluble?

Which one of the following polymers is prepared by condensation polymerisation?

Which one of the following anions is present in the chain structure of silicates?

Which of the following oxidation states are the most characteristic for lead and tin respectively?

“Foolish seedling” disease of rice led to the discovery of

A person who is one day hunger strike and is surviving only on water, will have

Lysozyme that is present in perspiration, saliva and tears, destroys

Which one of the following is a fat-soluble vitamin and its related deficiency disease?

A drop of each of the following, is placed separately on four slides. Which of them will not coagulate?

Which one of the following mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically?

In human body, which one of the following is anatomically correct?

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?

Which one of the following pairs of structures distinguishes a nerve axon from other types of cells?

Which of the following is an example of negative feedback loop in humans?

Which part of ovary in mammals acts as an endocrine gland after ovulation?

A person is having problems with calcium and phosphorus metabolism in his body. Which one of following glands may not be functioning properly?

Feeling the tremors of an earthquake, a scared resident of seventh floor of a multistored building starts climbing down the stairs rapidly. Which hormone initiated this action ?

Which one of the following is surrounded by a callose wall?

Male gametes in angiosperms are formed by the division of

Which one of the following pairs of plant structures has haploid number of chromosomes?

In human female, menstruation can be deferred by the administration of

A common test to find the genotype of a hybrid is by

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F ₂ segregation will show

In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in F₁ generation?

Inheritance of skin colour in humans is an example of

A human male produces sperms with the genotypes AB, Ab, aB, and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?

The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?

A sequential expression of a set of human genes

During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure, what is it’s DNA-binding sequence?

The two polynucleotide chains in DNA are

Molecules basis of organ differentiation depends on the modulation in transcription by

The okazaki fragments in DNA chain growth

one gene-one enzyme relationship was established for the first time in

When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed

Which one of the following statement is correct?

The concept of chemical evolution is based on

The finches of Galapagos islands provide an evidence in favour of

What is common between parrot, platypus and kangaroo?

What is common to whale, seal and shark?

Industrial melanism as observed in peppered moth proves that

Adaptive radiation refers to

One of the important consequences of geographical isolation is

Among the human ancestors the brain size was more that 1000 cc in

Select the correct statements from the following?

If you suspect major deficiency of antibodies in a person to which of the following would you look for confirmatory evidence?

Increased asthmatic attacks in certain seasons are related to

Which one of the following pair is mismatched?

Compared to a bull a bullock is docile because of

Which one of the following is a viral disease of poultry?

Which one of the following is being utilized as a source of biodiesel in the Indian countryside?

In maize, hybrid vigour is exploited by

Probiotics are

Which one of the following pairs is wrongly matched?

Ultrasound of how much frequency is beamed into human body for sonography ?

Geometric representation of age structure is a characteristic of population.

The population of an insect species shown an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?

Two plants can be conclusively said to belong to the same species if they

A high density of elephant population in an area can result in

Which one of the following ecosystem types has the highest annual net primary productivity?

One of endangered species of Indian medicinal plants is that of

Identify the odd combination of habitat and the particular animal concerned.

Which one of the following pairs of organisms are exotic species introduced in India?

In a coal fired power plant electrostatic precipitators are installed to control emission of

Which one of the following is not a bioindicator of water pollution?

Which one of the following statements is correct?

If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur:-

In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?

Which one of the following is not a part of a renal pyramid?

Arteries are best defined as the vessel which :

Match the source gland with its respective hormone as well as the function

What is common to whale, seal and shark?