Official NEET UG 2008 Test

A particle of mass m is projected with velocity v making an angle of 45º with the horizontal from level ground. When the particle lands on the level ground the magnitude of the change in its momentum will be –

A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is 4 \(\times \)10\(^{–3}\) Wb. The self-inductance of the solenoid is –

A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction \(\vec {B}\) . After 3 seconds the kinetic energy of the particle will be –

The distance travelled by a particle starting from rest and moving with an acceleration\(\frac{4}{3}\) ms\(^{–2}\), in the third second is –

A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 \( \times \) 10\(^{6}\)] ms\(^{–1}.\)The velocity of the particle is :(mass of electron = 9.1 \(\times \)10\(^{–31}\)kg)

Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be –

A thin conducting ring of radius R is given a charge + Q. The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is –

Two nuclei have their mass numbers in the ratio of 1 : 3. The ratio of their nuclear densities would be –

If M(A, Z), M\( _{p}\) and Mn denote the masses of the nucleus X  , proton and neutron respectively in units of u (1 u = 931.5 MeV/C\(^{2})\) and BE represents its bonding energy in MeV, then –

A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 ms\(^{–1}\) to 20 ms\(^{–1}\) while passing through a distance 135 m in t second. The value of t is –

A particle shows distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point :

An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature\(20^{º}C ?\) The temperature of boiling water is 100ºC.

In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of –

The circuit is equivalent to –

If the error in the measurement of radius of a sphere is 2 % then the error in the determination of volume of the sphere will be –

A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is 90\(^{º}\). The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is –

A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly :

Two periodic waves of intensities I\(_1\) and I\(_2\) pass through a region at the same time in the same direction. the sum of the maximum and minimum intensities is –

If Q, E and W denote respectively the heat added, change in internal energy and the work done by a closed cycle process, then :

In the circuit shown, the current through the 4\(\Omega\) resistor is 1 amp when the points P and M are connected to a D.C. voltage source. The potential difference between the points M and N is –

On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are\( 39^{º}\) W and\( 239^{º}\) W respectively. What will be the temperature on the new scale, corresponding to a temperature of \(39^{º}\)C on the Celsius scale ?

The wave described by \(y = 0.25 sin (10\pi x – 2 \pi f),\) where x and y are in metres and t in seconds, is a wave travelling along the –

The electric potential at a point in free space due to a charge Q coulomb is Q \(\times 10^{11}\) volts. The electric field at that point is –

The velocity of electromagnetic radiation in a medium of permittivity\( \varepsilon _{0}\) and permeability\( \mu_{0}\) is given by :

Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 sec and the velocity of the wave is 300 m/s. What is the phase difference between the oscillations of two points ?

Two simple Harmonic Motions of angular frequency 100 and 1000 rad s\( ^{–1}\) have the same displacement amplitude. The ratio of their maximum accelerations is –

If the lattice parameter for a crystalline structure is 3.6 , then the atomic radius in fcc crystal is –

Water falls from a height of 60 m at the rate of15 kg/s to operate a turbine. The losses due to frictional forces are 10 % of energy. How much power is generated by the turbine ? (g = 10 m/s\(^{2})\)

The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is :

A boy is trying to start a fire by focusing Sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the Sun is 1.39 \(\times \)10\(^{9}\) m and its mean distance from the earth is 1.5 \(\times\) 10\(^{11} m\). What is the diameter of the Sun’s image on the paper ?

A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ are F\(_{1}\), F\(_{2}\) and F\(_3\) respectively and are in the plane of the paper and along the directions shown, the forceon the segment QP is :

A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively –

Curie temperature is the temperature above which –

Which two of the following five physical parameters have the same dimensions ?

(a) Energy density

(b) Refractive index

(c) Dielectric constant

(d) Young’s modulus

(e) Magnetic field

The ground state energy of hydrogen atom is –13.6 eV. When its electron is in the first excited state, its excitation energy is –

The voltage gain of an amplifier with 9 % negative feedback is 10. The voltage gain without feedback will be –

A galvanometer of resistance\( 50 \Omega\) is connected to a battery of 3V along with a resistance of\( 2950 \Omega\) in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be –

A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is –

In an A.C. circuit the emf (e) and the current (i) at any instant are given respectively by:

\(e =E_{0} sin \omega{t}\)

\(i = I_{0} sin (\omega{t}- \phi)\)

Three forces acting on a body are shown in the figure. To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed is –

A current of 3 amp. flows through the\( 2\Omega\) resistor shown in the circuit. The power dissipated in the \( 5\Omega\) resistor is –

Two radioactive materials X\(_{1}\) and X\(_{2}\) have decay constants 5\(\lambda \)and\( \lambda\) respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X\(_{1}\) to that of X\( _{2}\) will be \(\frac{1}{e}\) after a time –

The work function of a surface of a photosensitive material is 6.2 eV. The wavelength of the incident radiation for which the stopping potential is 5 V lies in the :

A point performs simple harmonic oscillation of period T and the equation of motion is given by x = a sin \((\omega t + \pi/6)\). After the elapse of what fraction of the time period the velocity of the point will be equal to half of its maximum velocity ?

Two thin lenses of focal lengths f1 and f2 are in contact and coaxial. The power of the combination is –

At \(10^{º}C\) the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At\( 110^{º}\)C this ratio is –

A roller coaster is designed such that riders experience “weightlessness” as they go round the top of a hill whose radius of curvature is 20m. The speed of the car at the top of the hill is between –

A circular disc of radius 0.2 metre is placed in a uniform magnetic field of induction\(\frac{1}{\pi} (\frac{Wb}{m^{2}})\) in such a way that its axis makes an angle of\( 60^{º}\) with\( \vec {B}.\) The magnetic flux linked with the disc is –

The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius around their respective axes is –

A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and without being short circuited through a resistance of \(10 \Omega\). Its internal resistance is –

Which one of the following arrangements does not give the correct picture of the trends indicated against it ?

If a gas expands at constant temperature, it indicates that :

The dissociation equilibrium of a gas AB2 can be represented as :\(2AB_{2}(g) \rightleftharpoons 2 AB(g) + B_{2}(g)\) The degree of dissociation is ‘x’ and is small compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant \(K_{p}\) and total pressure P is –

The bromination of acetone that occurs in acid solution is represented by this equation. \(CH_{3}COCH_{3}(aq.) + Br_{2}(aq.) \to CH_{3}COCH_{2}Br(aq.) + H^{+} (aq.) + Br^{-} (aq.)\) These kinetic data were obtained from given reaction concentrations.

Initial rate, disappearance of\( Br_{2}, Ms^{–1}\)

\(5.7 \times 10^{-5}\)

\(5.7 \times 10^{-5}\)

\(1.2 \times 10^{-4}\)

\(3.1 \times 10^{-4}\)

Based on these data, the rate equation is :

If the concentration of OH– ions in the reaction,\(Fe(OH)_{3}(s) \rightleftharpoons Fe^{3+} (aq.) + 3OH^{-} (aq.)\) is decreased by\(\frac{1}{4}\) times, then equilibrium concentration of\( Fe^{3+}\) will increase by –

What volume of oxygen gas \((O_{2})\) measured at \(0^{º}\)C and 1 atm, is needed to burn completely one litre, of propane gas\( (C_{3}H_{8})\) measured under the same conditions ?

Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H\(^{+}\) ion concentration in the mixture ?

The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of –

In DNA, the complementary bases are –

Base strength of –

(i)\( H_{3} C \Theta ^{CH}_{2}\)    (ii)\( H_{2} =\Theta ^{CH}\) and

(iii)\( H – C \equiv \Theta C\) is in the order of –

Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH ?

The sequence of ionic mobility in aqueous solutions is –

If uncertainty in position and momentum are equal, then uncertainty in velocity is –

How many stereoisomers does this molecule have ?

\(CH_{3}CH = CHCH_{2}CHBrCH_{3}\)

On the basis of the following\( E^{º}\) values, the strongest oxidizing agent is :

[Fe(CN)\(_{6}]^{4-}\) \(\to\) [Fe(CN)\(_{6}]^{3-}\) + e\(^{-1} \),E\(^{º} \)= -0.35 V

Fe\(^{2+}\) \(\to\) Fe\(^{3+}\) + ev\(^{-1}\), E\(^{º}\) = – 0.77 V

The correct order of decreasing second ionization enthalpy of Ti = 22, V = 23, Cr = 24 and Mn = 25 is –

Which one of the following is most reactive towards electrophilic attack ?

Four diatomic species are listed below in different sequences. Which of these presents the correct order of their increasing bond order ?

How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl ?

The stability of carbanions in the following :

is in the order of :

Acetophenone when reacted with a base,C\(_{2}\) H\(_{5}\)ONa, yields a stable compound which has the structure :

Volume occupied by one molecule of water (density = 1g cm\(^{–3})\) is :

Bond dissociation enthalpy of H\(_{2}\), Cl\(_{2}\) and HCl are 434, 242 and 431 kJ mol\(^{–1}\) respectively. Enthalpy of formation of HCl is –

Which of the following complexes exhibits the highest paramagnetic behaviour ?

Which one of the following statements is not true ?

In a reaction of aniline a coloured product (C) was obtained.

The structure of (C) would be –

For the gas phase reaction, PCl\(_{5}\)(g) \(\rightleftharpoons \) PCl\(_{3}\)(g) + Cl\(_{2}\)(g) Which of the following conditions are correct

The measurement of the electron position is associated with an uncertainty in momentum, which is equal to 1 × 10\(^{–18}\) g cm s\(^{–1}\). The uncertainty in electron velocity is :

(Mass of an electron is 9 × 10\(^{–28}\) g)

The angular shape of ozone molecule (O\(_{3}\)) consists of –

Percentage of free space in a body centered cubic unit cell is –

The value of equilibrium constant of the reaction, HI(g)\( \rightleftharpoons \) 1/2 H\(_{2}\)(g) + 1/2I\(_{2}\) (g) is 8.0. The equilibrium constant of the reaction, H\(_{2}\)(g) + I\(_{2}\)(g)\( \rightleftharpoons \) 2HI(g) will be –

The value of 1 K\(_{p}\) and 2 K\(_{p}\) for the reactions

X \( \rightleftharpoons  \) Y+Z …..(1)

A \( \rightleftharpoons  \) 2B    …..(2)

are in ratio of 9 : 1. If degree of dissociation of X and A be equal, then total pressure at equilibrium (1) and (2) are in the ratio :

Which one of the following is an amine hormone ?

Kohlrausch’s Law states that at :

Green chemistry means such reactions which –

Which of the following statements is not correct ?

In a SN\(_{2}\) substitution reaction of the type R-Br+CI\(^{-\overset{DMF}{\rightarrow}}\)R-CI+Br\(^{-}\) Which one of the following has the highest relative rate ?

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

With which one of the following elements silicon should be doped so as to give p-type of semiconductor?

An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be :

In which of the following co-ordination entities the magnitude of ∆O (CFSE in octahedral field) will be maximum?

The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?

Which of the following are not state functions?

(I) q+w                        (II) q
(III) w                          (IV) H-TS

In the hydrocarbon,

6 5 4 3 2 1

CH\(_{3}\)—CH=CH—CH\(_{2}\)—C≡CH

The state of hybridization of carbons 1, 3 and 5 are in the following sequence:

Number of moles of  MnO\(^{-}_{4}\) required to oxidize one mole of ferrous oxalate completely in acidic medium will be

The rate constants k\(_{1}\) and k\(_{1}\) for two different reactions are 10\(^{16}\).e\(^{–2000/T}\) and 10\(^{15}\).e\(^{–1000/T}\), respectively, the temperature at which k\(_{1}\)=k\(_{2}\),, is:

A strong base can abstract an α-hydrogen from:

Standard free energies of formation (in kJ/mol) at 298 K are -237.2, -394.4 and -8.2 for H\(_{2}\)O(l), CO\(_{2}\)(g) and pentane(g) respectively The value of E\(_{0}\) cell for the pentane-oxygen fuel cell is:

If ‘a’ stands for the edge length of the cubic systems : simple cubic, body centered cubic and face centered cubic, then the ratio of radii of the spheres in these systems will be respectively.

A competitive inhibitor of succinic dehydrogenase is :

Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in:

Which one of the following statements is incorrect about menstruation?

Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage?

In leaves of C-4 plants malic acid synthesis during CO\(_{2}\) fixation occurs in:

What is true about the isolated small tribal populations?

The Replum is present in the ovary of flower of:

Unisexuality of flowers prevents:

The length of different internodes in a culm of sugarcane is variable because of:

Which one of the following is not observed in biodiversity hotspots ?

Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to the total global warming ?

The two subunits of ribosome remain united at a critical ion level of :

Given below are four methods (A-D) and their modes of action (1-4) in achieving contraception. Select their correct matching from the four options that follow:
Method                                         Mode of Action
(1) The pill                                (a) Prevents sperms reaching cervix
(2) Condom                             (b) Prevents implantation
(3) Vasectomy                         (c) Prevents ovaulation
(4) Copper-T                            (d) Semen contains no sperms

The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Tri-Phosphate (ATP) is formed because:

The linking of antibiotic resistance gene with the plasmid vector became possible with:

The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of :

Thorn of Bougainvillea and tendril of Cucurbita are examples of:

Consider the following four measures (1-4) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common:
(i) Spray with Bordeaux mixture
(ii) Control of the insect vector of the disease pathogen
(iii) Use of only disease-free seeds
(iv) Use of varieties resistant to the disease
Which two of the above measures can control the disease?

World Summit on Sustainable Development (2002) was held in:

Darwin’s Finches are an excellent examples of:

Polysome is formed by:

Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?

The fruit is chambered, developed from inferior ovary and has seeds with succulent testa in

Endosperm is consumed by developing embryo
in the seed of:

In the DNA molecule:

Given below is a diagrammatic cross section of a single loop of human cochlea:

Which one of the following options correctly represents the names of three different parts?

Which type of white blood cells are concerned with the release of histamine and the natural anti-coagulant heparin?

Thermococcus, Methanococcus and Methanobacterium exemplify:

Which one of the following is being tried in India as a biofuel substitute for fossil fuels?

Dry indehiscent single-seeded fruit formed from
bicarpellary, syncarpous, inferior ovary is:

Which one of the following pairs of codons is
correctly matched with their function or the
signal for the particular amino acid?

Select one of the following pairs of important features distinguishing Gnetum form Cycas and Pinus and showing affinities with angiosperms:

Earthworms have no skeleton but during burrowing the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to:

Which one of the following is the true description about an animal concerned?

Which extraembryonic membrane in humans
prevents desiccation of the embryo inside the
uterus?

About 70% of total global carbon is found in:

Human insulin is being commercially produced from a transgenic species of:

Vacuole in a plant cell:

Quercus species are the dominant component in:

Vascular tissues in flowering plants develop
from:

Gel electrophoresis is used for:

Which one of the following pairs of organs includes only the endocrine glands?

Haploids are more suitable for mutation studies
than the diploids. This is because:

Consider the following four statements (1-4) about certain desert animals such as kangaroo-rat.

(i) They have dark colour and high rate of reproduction and excrete solid urine

(ii) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs

(iii) They feed on dry seeds and do not required drinking water

(iv) They excrete very concentrated urine and do not use water to regulate body temperature Out of these four, which two are correct-

Which one of the following is NOT a characteristic of phylum Annelida?

In human adult females oxytocin:

The most active phagocytic white blood cells are:

In which one of the following, male and female gametophytes do not have free-living independent existence?

What is vital capacity of our lungs?

Which one of the following is hetero-sporous?

The blood calcium level is lowered by the deficiency of:

The C\(_{4}\) plants are photosynthetically more efficient than C\(_{3}\) plants because:

Which one of the following phyla is correctly matched with its two general characteristic?

In germinating seeds fatty acids are degraded exclusively in the:

Which one of the following is the correct difference between Rod cells and Cone cells of our retina?

In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea?

Which one of the following proved effective for biological control of nematodal disese in plants?

A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this?
(i) Lots of urea and phosphate fertilizer were used in the crops in the vicinity
(ii) the area was sprayed with DDT by an aircraft
(iii) The lake water turned green and stinky
(iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis
Which two of the above were the main causes of fish mortality in the lake?

The table below gives the populations (in thousands) of ten species (A-J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows:

Which area out of a to d shows maximum species diversity?

During the propagation of a nerve impulse, the action potential results from the movement of:

Consider the following statements concerning food chains:

(i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation

(ii) Removal of most of the carnivores resulted in an increased population of deers

(iii) The length of food chains is generally limited to 3-4 trophic levels due to energy loss

(iv) The length of food chains may vary from 2 to 8 trophic levels

Modern detergents contain enzyme preparations of:

What is antisense technology?

Cornea transplant in humans is almost never rejected. This is because:

Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?

In humans, blood passes from the post caval to the diastolic right atrium of heart due to:

Which one of the following is resistant to enzyme action?

According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?

Cellulose is the major component of cell walls of :

What does the filiform apparatus do at the entrance into ovule?

Match the disease in Column I with the appropriate items (pathogen/ prevention/ treatment) in Column II.
Column I                                               Column II
(A) Amoebiasis                                    (i) Treponemapallidium
(B) Diphtheria                                      (ii) Use only sterilized food and water
(C) Cholera                                            (iii) DPT Vaccine
(D) Syphilis                                          (iv) Use oval rehydration therapy

Carbohydrates are commonly found as starch in plant storage organs. Which of the following five (1-5) properties of starch make it useful as a storage material?
(1) Easily translocated
(2) Chemically non-reactive
(3) Easily digested by animals
(4) Osmotically inactive
(5) Synthesized during photosynthesis

The slow rate of decomposition of fallen logs in nature is due to their:

Cry1 endotoxins obtained from Bacillus thuringiensis are effective against:

Consider the statements given below regarding contraception and answer as directed thereafter:
(i) Medical Termination of Pregnancy (MTP) during first trimester is generally safe

(ii) Generally chances of conception are nil until mother breast-feeds the infant upto two years

(iii) Intrauterine devices like copper-T are effective contraceptives

(iv) Contraception pills may be taken upto one week after coitus to prevent conception
Which two of the above statement are correct?

Bacterial leaf blight of rice is caused by a species of:

Trichoderma harzianum has proved a useful microorganism for:

Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?

To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?

Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?

A transgenic food crop which may help in solving the problem of night-blindness in developing countries is:

Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?

What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

Nitrogen fixation in root nodules of Alnus is brought about by:

Which one of the following is the correct statement regarding the particular psychotropic drug specified?