Official NEET UG 2007 Test

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 particle moving along x-axis has acceleration f, at time t, given by

f = f0  , where f0 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 (vx) is:

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:-

A particle staring from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are\( (\sqrt{3},3) \). 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 as angular acceleration of 3.0 rad/sec\(^2\) and initial angular speed of 2.00 rad/sec. In a time of 2 sec it has rotated through an angle (in radian) of :

\(\vec{A}\) and \(\vec{B}\) are two vectors and \(\theta\) is the angle between them, if \(|\vec{A}\times\vec{B}| =\sqrt{3}(\vec{A}.\vec{B})\) the value of ? is:-

The position x of a particle with respect to time t along x-axis is given by x = 9t\(^2\) – t\(^3\) where x is in metres and t in seconds. What will be the position of this particle when it achieves maximum speed along the + x direction ?

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 200N/m. What should be the minimum amplitude of the motion so that the mass gets detached from the pan (Take g = 10 m/s\(^2\) )

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 :

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 \(\frac{ml^{2}}{3}\)the initial angular acceleration of the rod will be:-

Two satellites of earth, S\(_1\) and S\(_2\), are moving in the same orbit. The mass of S1 is four times the mass of S\(_2\). Which one of the following statements is true ?

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

Where \(\sigma\) is the Stefan’s Constant.

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

A black body is at 727ºC. It emits energy at a rate which is proportional to:

The frequency of a light wave in a material is \(2 × 10^{14}\) Hz and wavelength is 5000 Å. The refractive index of material will be:-

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 ienetic energy K0 cos\(^{2}\omega\)t. The maximum values of the potential energy and the total energy are respectively:-

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:

The electric and magnetic field of an electromagnetic wave are:-

A small coin is resting on the bottom of a beaker filled with a liquid. A ray of light from the coin travels upto the surface of the liquid and moves along its surface (see figure)

How fast is the light traveling in the liquid ?

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

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-

Three point charges +q, –2q 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:-

Two condensers, one of capacity C and the other of capacity \(\frac{c}{2}\), are connected to a V-volt battery, as shown-

The work done in charging fully both the

condensers is:

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

A steady current of 1.5 amp flows through a copper voltameter for 10 minutes. If the electrochemical equivalent of copper is \(30 × 10^{–5} gm coulomb^{–1}\), the mass of copper deposited on the electrode will be: –

If the cold junction of a thermo-couple is kept at 0ºC and the hot junction is kept at TºC, then the relation between neutral temperature\( (T_n)\) and temperature of inversion \((T_i)\) is:

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

The resistance of an ammeter is 13\(\Omega\) and its scale is graduated for a current upto 100 amps. After and 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-

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-

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:

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

The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux \(\Psi\) linked with the primary coil is given by \(\Psi = \Psi_0 + 4t\), where \(\Psi\) is in webers, t is time in seconds and \(\Psi_0\) is a constant, the output voltage across the secondary coil is:

What is the value of inductance L for which the current is a maximum in a series LCR circuit with C = 10 \(\mu\) F and \(\omega\) = 1000s\(^{–1 }\)?

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

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

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 1.0m, the number of photo electrons liberated will :

Monochromatic light of frequency\( 6.0 × 10^{14 }\)Hz is produced by a laser. The power emitted is \(2 × 10^{–3}\)W. The number of photons emitted, on the average, by the source per second is:-

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 paths of radius R using a magnetic field B. If V and B are kept constant, the ratio \((\frac{charge on the ion}{mass of the ion}) \)will be proportional to:-

If the nucleus\(^{27}Al_ {13}\) has a nuclear radius of about 3.6 fm, the \(^{125}Te_ {52}\)would have its radius approximately as:-

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

A nucleus \(^{A}X_{Z}\) 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:

Two radioactive substances A and B have decay constants5\(\lambda\) and\(\lambda\) 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 \((\frac{1}{e})^{2} \)after a time interval:-

The total energy of electron in the ground state of hydrogen atom is –13.6 eV. The kinetic energy of an electron in first excited state 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 voltage gain of 50, an input impedance of 100\(\Omega\) and an output impedance of 200 \(\Omega\). The power gain of the amplifier is:-

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

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

With which of the following electronic configuration of an atom has the lowest ionization enthalpy:

An element, X has the following isotopiccomposition; \(^{200}X : 90% ^{199}X : 8.0% ^{202}X : 2.0%\) The weighted average atomic mass of the naturally-occurring element X is closest to:

Concentrated aqueous sulphuric acid is 98% \(H_{2}SO_{4}\) by mass and has a density of 1.80 g.mL\(^{–1}\). Volume of acid required to make 1 litre of 0.1 \(M H_{2}SO_{4} \)solution is:

Consider the following sets of quantum number:

n          l          m         s

(a) 3            0        0      +½

(b) 2            2         1      +½

(c) 4            3        –2     –½

(d) 1            0       –1      –½

(e) 3            2          3      +½

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

The number of moles of \(KMnO_{4} \)that will be needed to react with one mole of sulphite ion in acidic solution is:

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

The reaction of hydrogen an iodine monochloride is given as \( H_{2(g) }+ 2ICl_{(g)} \to 2HCl_{(g)} + I_{2(g)}\) This reaction is of first order with respect to H2(g) and ICl\(_{(g)}\), following mechanisms were proposed

Mechanism A: \(H_{2(g)} + 2ICl_{(g)} \to 2HCl_{(g)} + I_{2(g)}\)

Mechanism B : \(H_{2(g)} + ICl_{(g)} \to HCl_{(g)} + HI_{(g)}\) ; Slow \(HI_{(g)} + ICl_{(g)} \to HCl_{(g)} + I_{2(g)} \); Fast Which of the above mechanism(s) can be consistent with the given information about the reaction:

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)

The equilibrium constant of the reaction:

\( Cu(s) + 2Ag ^{+}(aq) \to Cu^{2+}(aq) + 2Ag(s); E^{º} = 0.46V at 298 K is:\)

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:

The efficiency of a fuel cell is given by :

Consider the following reactions:

Given that bond energies of H–H and Cl–Cl are 430 kJ mol\(^{–1}\) and 240 kJ mol\(^{–1}\) respectively and \(\bigtriangleup_{f}\)H for HCl is –90 kJ mol\(^{–1}\). Bond enthalpy of HCl is :

The Langmuir adsorption isotherm is deduced using the assumption:

The following equilibrium constants are given-

\(N_2+3H_2\rightleftharpoons 2NH_3 ; K_1\)

\(N_2+3O_2\rightleftharpoons 2NO ; K_2\)

\(N_2+1/2O_2\rightleftharpoons H_2O ; K_3\)

The equilibrium constant for the oxidation of the NH\(^{3}\) by oxygen to give NO is:

Calculate the pOH of a solution at 25ºC that contains\( 1× 10^{–10}\) M of hydronium ions, i.e. \(H_{3}O^{+}\) ;

A weak acid HA has a \(K_{a} of 1.00 × 10^{–5}\). 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:

Identify the correct order of the size of the following:

In which of the following pairs, the two species are iso-structural ?

The correct order of C–O bond length among\(CO,CO^{2-}_{3}, CO_{2} is:\)

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

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

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

The correct order of increasing thermal stability of \(K_{2}CO_{3}, MgCO_{3}, CaCO_{3}\) and \(BeCO_{3}\) is:

Sulphide ores of metals are usually concentrated by Froth Flotation process. Which one of the following sulphide ores offers and exception and is concentrated by chemical leaching ?

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

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

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

Identify the incorrect statement among the following

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

(At. No. Ti = 22, V = 23, Cr = 24, Mn = 25)

The d electron configuration of \(Cr^{2+}, Mn^{2+}, Fe^{2+} and Ni^{2+} are 3d^{4} , 3d^{5} , 3d^{6} and 3d^{8}\) respectively. Which one of the following aqua complex will exhibit the minimum paramagnetic behaviour ?

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

Which of the following will give a pair of enantiomorphs:

\( (en = NH_{2} CH_{2} CH_{2} NH_{2})\)

If NaCl is doped with106\({–4}\) mole% of SrCl\(_{2}\), the concentrate of cation vacancies will be: (N\(_{A}\) = 6.02 × 10\(^{23}\) mol\(^{–1})\)

Which of the following presents the correct order of the acidity in the given compounds:

The product formed in Aldol condensation is:

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

Consider the following compounds:

The correct decreasing order of their reactivity towards hydrolysis is:

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

Which one of the following on reduction with lithium aluminium hydride yield a secondary amine:

The order decreasing reactivity towards an electrophilic reagent, for the following:

(a) Benzene

(b) Toluene

(c) Chlorobenzene and

(d) Phenol

Would be:

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

Which of the compounds with molecular formula\( C_{5}H_{10}\) yields acetone on ozonolysis:

If there is no rotation of plane polarized light by a compound in a specific solvent, through to the chiral, it may mean that :

For the following:

\((a) I^{–} (b) Cl^{–} (c) Br^{–}\) The increasing order of nucleophilicity would be:

\(CH^{3}–CHCl–CH^{2}–CH^{3}\)has a chiral centre, which one of the following represents its R configurations:

Which one of the following vitamins is water-soluble:

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

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

Biological organization starts with:-

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

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

What is common to whale, seal and shark ?

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

Select the wrong statement from the following:

The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of:-

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:-

Which one of the following is a slime mould ?

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

Which one of the following statements about mycoplasma is wrong?

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

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

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

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

In gymnosperms, the pollen chamber represents:

Spore dissemination in some liverworts is aided by :

Which pair of the following belongs to Basidiomycetes ?

ICBN stands for :

Ergot of rye is caused by a species of:-

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

Adaptive radiation refers to:-

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

The finches of Galapogas islands provide an evidence in favour of-

One of the important consequences of geographical isolation is:-

Industrial melanism as observed in peppered moth proves that:-

The concept of chemical evolution is based on-

Among the human ancestors the brain size was more than 1000 CC in:-

Which of the following pairs are correctly matched ?

Select the correct statement from the following:

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

What is common between parrot, platypus and kangaroo ?

What is true about Nereis, Scorpion, Cockroach and Silver fish ?

Which one of the following statement is correct ?

“Foolish Seedling” disease of rice led to the discovery of :-

Passage cells are thin-walled cells found in:-

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

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

The wavelength of light absorbed by Pr form of phytochrome is:-

Opening of floral buds into flowers, is a type of:

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

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

Male gametes in angiosperms are formed by the division of:

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 be:-

In the leaves of \(C_{4}\) plants, malic acid formation during \(CO_{2} \)fixation occurs in the cells of :

Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism ?

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

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

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

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

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

Compared to a bull a bullok is docile because of:-

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

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

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

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

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

A person who is on a long hunger strike and is surviving only on water, will have:-

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

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

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 ?

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

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

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 ecosystem types has the highest annual net primary productivity ?

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

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 ?

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

Geometric representation of age structure is a characteristic of :-

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

One of endangered species of Indian medicinal plants is that of:-

A genetically engineered micro-organism used successfully in bioremediation of oil spills is a species of-

A sequential expression of a set of human genes occurs when a steroid molecule binds to the:-

The Okazaki fragments in DNA chain growth:-

In the hexaploid wheat, the haploid(n) and basic(x) numbers of chromosomes are:

Molecular basis of organ differentiation depends on the modulation in transcription by-

Telomere repetitive DNA sequences control the function of eukaryote chromosomes because they:

Inheritance of skin colour in humans is an example of:-

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

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

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 maize, hybrid vigour is exploited by:-

Differentiation of organs and tissues in a developing organism, is associated with-

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 F\(_1\) generation ?

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