Official NEET UG 2005 Test

The rate of reaction between two reactants A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is :-

The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5eV. According to Einstein’s equation, the metals which will emit photo electrons for a radiation of wavelength 4100\(Å\) is/are-

Zener diode is used for:-

In the reaction \(^2_1H + ^3_1H \to ^4_2He +^0_1n\).  If the binding energies of \(^2_1H,^3_1H \) and  \(^4_2He\)are respectively a, b and c (in MeV), then the energy (in MeV) released in this reaction is

In a circuit L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45\(^o\). The value of C is –

Which of the following processes is reversible

Two batteries, one of emf 18 volts and internal resistance 2\(\Omega \) and the other of emf 12 volt and internal resistance 1\(\Omega \), are connected as shown. The voltmeter V will record a reading of.

Two charges q\(_1\) and q\(_2\) are placed 30 cm apart, as shown in the figure. A third charge q\(_3\) is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is k \(\frac{q_3}{4\pi E_0}\) k , where k is –

An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at the centre of the circle. The radius of the circle is proportional to :

A 5-ampere fuse wire can withstand a maximum power of 1 watt in the circuit. The resistance of the fuse wire is :

As per this diagram a point charge +q is placed at the origin O. Work done in taking another point charge –Q from the point A coordinates (0, a) to another point B coordinates (a, 0) along the straight path AB is

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by \(\mu _d\), \(\mu _p\) and \(\mu _f\) respectively, then

Two vibrating tuning forks produce progressive waves given by Y\(_1\) = 4 sin 500 \(\pi \)t and Y\(_2\) = 2 sin 506 \(\pi \)t Number of beats produced per minute is

When a wire of uniform cross-section a, length \(l\)and resistance R is bent into a complete circle, resistance between any two of diametrically opposite points will be –

A particle executing simple harmonic motion of amplitude 5 cm has maximum speed of 31.4 cm/s. The frequency of its oscillation is :

The temperature of inversion of a thermocouple is 620\(^o\)C and the neutral temperature is 300\(^o\)C. What is the temperature of cold junction :

The ratio of the dimension of Planck’s constant and that of the moment of inertia is the dimension of :

A bomb of mass 30kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18kg mass is 6ms\(^{–1}\). The kinetic energy of the other mass is :

The nuclei of which one of the following pairs of nuclei are isotones :

A photosensitive metallic surface has work function, h ν\(_0\). If photons of energy 2h ν\(_0\) fall on this surface, the electrons come out with a maximum velocity of 4 × 10\(^6\) m/s. When the photon energy is increased to 5hν\(_0\), then maximum velocity of photo electrons will be

As a result of change in the magnetic flux linked to the closed loop shown in the figure, an e.m.f. V volt is induced in the loop. The work done (joules) in taking a charge Q coulomb once along the loop is-

An ideal gas heat engine operates in Carnot cycle between 227\(^o\)C and 127\(^o\)C. It absorbs 6 × 10\(^4\) cals of heat at higher temperature. Amount of heat converted to work is:-

A coil in the shape of an equilateral triangle of side \(l\) is suspended between the pole pieces of a permanent magnet such that \(\vec{B}\) is in place of the coil. If due to a current i in the triangle a torque \(\tau \) acts on it, the side l of the triangle is-

If \(\lambda _v, \lambda _x and \lambda _m \)represent the wavelengths of visible light, x-rays and microwaves respectively, then-

For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is –

The moment of inertia of a uniform circular disc of radius ‘R’ and mass ‘M’ about an axis passing from the edge of the disc and normal to the disc is-

In any fission process the ratio

\(\frac{mass of fission products}{mass of parents nucleus}\)

Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54\(Å\). The value of lattice constant for this lattice is-

Fission of nuclei is possible because the binding energy per nucleon in them-

The angular resolution of a 10cm diameter telescope at a wavelength of 5000\(Å\) is of the order of –

A drum of radius R and mass M, rolls down without slipping along an inclined plane of ngle \(\theta \). The frictional force-

A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolution in 44 seconds, what is the magnitude and direction of acceleration of the stone-

Choose the only false statement from the following-

The circular motion of a particle with constant speed is-

The total energy of an electron in the first excited state of hydrogen atom is about –3.4eV. Its kinetic energy in this state is-

Carbon, Silicon and Germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by \((E_g)_C\), \((E[latex]_g)_{Si}\) and \((E_g)_{Ge}\) respectively. Which one of the following relationships is true in their case

Which of the following circular rods, (given radius r and length \(l\)) each made of the same energy material and whose ends are maintained at the same temperature will conduct most heat

If a vector \( 2\vec{i} + 3 \vec{j} + 8\vec{k} \) is perpendicular to the vector \( 24\vec{j} – 4 \vec{i} + a\vec{k} \) then the value of \(\alpha \)

Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g’, then –

If the angle between the vector \(\vec{A}\) and  \(\vec{B}\) is \(\theta {A}\), the value of the product (\(\vec{B}\)  ×  \(\vec{A}\)) . \(\vec{A}\)  is equal to –

A point source emits sound equally in all directions in a non-absorbind medium. Two points P and Q are at distance of 2m and 3m respectively from the source. The ratio of the intensities of the waves at P and Q is –

Application of a forward bias to a p-n junction –

Energy levels A, B and C of a certain atom correspond to increasing values of energy i.e. \(E_A < E_B < E_C\).  If \(\lambda _1,  \lambda _2 and  \lambda _3\) are wave lengths of radiations corresponding to transitions C to B, B to A and C to A respectively, which of the following relations is correct –

The displacement x of a particle varies with time t as x = ae\(^{–αt}\) + be\(^βt\) , where a , b, \(\alpha \) and \( \beta \) are positive constants. The velocity of the particle will –

Two boys are standing at the ends A and B of a ground where AB = a. The boy at B starts. running in a direction perpendicular to AB with velocity v\(_1\). The boy at A starts running simultaneously with velocity v and catches the other boy in a time t, where t is –

Two bodies have their moments of inertia I and 2I respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular momentum will be in the ratio –

A ball is thrown vertically up ward. It has a speed of 10m/sec when it has reached one half of its maximum height. How high does the ball rise? Take g = 10 m/s\(^2\)
–

Which one of the following is an inner orbital complex as well as diamagnetic in behaviour –

Which one of the following oxides is expected to exhibit paramagnetic behaviour –

The best method for the separation of naphthalene and benzoic acid from their mixture is –

Which one of the following forms micelles in aqueous solution above certain concentration –

The aqueous solution containing which one of the following ions will be colourless –

[Atomic number : Sc = 21, Fe = 26, Ti = 24, Mn = 25]

A reaction occurs spontaneously if –

In a face –centered cubic lattice, a unit cell is shared equally by how many unit cells :-

Which amongst the following is the most stable carbocation :-

The mole fraction of the solute in one molal aqueous solution is :-

Which of the following is the simplest amino acid –

During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP –

Ectophloic siphonostele is found in -=

G-6-P dehydrogenase deficiency is associated with haemolysis of –

Which of the following statements regarding enzyme inhibition is correct –

In contrast to Annelids the Platyhelminths show

Which of the following represents the edible part of the fruit of Litchi –

Which one of the following pairs in mismatched-

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these –

E. coli cells with a mutated z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because –

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species :-

The vapour pressure of two liquids ‘P’ and ‘Q’ are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mole of Q would be :-

The mass of carbon anode consumed (giving only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is :-

(Atomic mass : Al = 27)

The absolute enthalpy of neutralisation of the reaction :

MgO(s) +2HCl(aq) \(\to \) MgCl\(_2\)(aq)+H\(_2\)O(1) will be : –

Which one of the following alkenes will react faster with H\(_2\) under catalytic hydrogenation conditions :-

[R = Alkyl substituent]

A solution of urea (mol. mass 56 g mol\(^{–1}\)) boils at 100.18\(^o\)C at the atomospheric pressure. If K\(_f\) and K\(_b\) for water are 1.86 and 0.512K kg mol\(^{–1}\)respectively , the above solution will freeze at :-

The energy of second Bohr orbit of the hydrogen atom is –328 kJ mol\(^{–1}\); hence the energy of fourth Bohr orbit would be :-

The surface tension of which of the following liquid is maximum :-

Which one of the following pair represents stereo isomerism :-

The number of moles of KMnO\(_4\) reduced by one mole of KI in alkaline medium is :-

Which of the following undergoes nucleophilic substitution exclusively by SN\(^1\) mechanism :

Four successive members of the first row transition elements are listed below with their atomic numbers. which one of them is expected to have the highest third ionization enthalpy :-

Which one of the following is expected to exhibit optical isomerism ?

(en = ethylenediamine)

A solution has a 1 :4 mole ratio of pentane to hexane. The vapour pressures of the pure hydrocarbons at 20\(^o\)C are 440 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in the vapour phase would be-

Which functional group participates in disulphide bond formation in proteins :-

At 25oC, the dissociation constant of a base, BOH, is 1.0 × 10\(^{–12}\). The concentration of hydroxyl ions in 0.01M aqueous solution of the base would be :-

The correct order in which the O-O bond length increases in the following is :-

Which of the following molecules has trigonal planner geometry ;

The main reason for larger number of oxidation states exhibited by the actinoids than the corresponding lanthanoids, is :-

Electrolytic reduction of nitrobenzene in weakly acidic medium gives :-

Which one of the following compounds is most acidic :-

For a first order reaction A\(\to \)  B the reaction rate at reactant concentration of 0.01M is found to be .0 × 10\(^{–5}\) mole L\(^{–1}\)s\(^{ –1}\). The half life period of the reaction is :-

What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH\(_1\)), sodium sulphide (pH\(_2\)), sodium selenide (pH\(_3\)) and sodium telluride (pH\(_4\)) ?

The cell membranes are mainly composed of :-

Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction –

Which of the following would have a permanent dipole moment –

The correct sequence of increasing covalent character is represented by –

IUPAC Name of some compounds are given. Which one is incorrect –

A nuclide of an alkaline earth metal undergoes radioactive decay by emission of the \(\alpha \)-particles is succession. The group of the periodic table to which the resulting daughter element would belong is :-

4.5g of aluminium (at. mass 27 amu) is deposited at cathode from Al\(^{3+}\) solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H\(^+\) ions in solution by the same quantity of electric charge will be –

Which of the following is the electron deficient molecule –

H\(_2\)S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because-

The correct order of acid strength is –

The deficiencies of micronutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport –

Through which cell of the embryo sac, does the pollen tube enter the embryo sac-

An acromian process is characteristically found in the –

Golden rice is a transgenic crop of the future with the following improved trait –

In a type of apomixis known as adventive embryony, embryos develop directly from the –

All of the following statements concerning the Actinomycetous filamentous soil bacterium Frankia are correct EXCEPT that Frankia –

In ornithine cycle which of the following wastes are removed form the blood –

At a particular locus, frequency of ‘A’ allele is 0.6 and that of ‘a’ is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cell of the following. Which of the cells are least likely to be replaced by new cells –

Which one of the following makes use of RNA as a template to synthesize DNA –

A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as get the best possible resolution –

As compared to a C\(_3\)-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C\(_4\)-plants –

Bacillus thuringiensis (Bt) strains have been used for designing novel –

Secretin and cholecystokinin are digestive hormones. They are secreted in –

Grey crescent is the area –

Match items in Column I with those in Column II –

Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originates as adaptation. These imprints need to be used –

Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non- living matter –

Which of the following is not used for disinfection of drinking water –

Which of the following characters is not typical of the class Mammalia –

Identify the correctly matched pair –

Auxospores and hormocysts are formed respectively, by –

Which one of the following phenomena supports Darwin’s concept of natural selection in organic evolution –

The name of Norman Borlaug is associated with-

Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by –

Which of the following is generally used for induced mutagenesis in crop plants –

One of the most important functions of botanical gardens is that –

The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is –

Epithelial cells of the intestine involved in food absorption have on their surface –

If mammalian ovum fails to get fertilized, which one of the following is unlikely –

The catalytic efficiency of two different enzymes can be compared by the –

Biodiversity Act of India was passed by the Parliament in the year –

The salivary gland chromosomes in the dipteran larva, are useful in gene mapping because –

Top-shaped multiciliate male gametes, and the mature seed which bears only one embryo with two cotyledons, are characteristic features of –

Which group of three of the following five statements (a-e) contain is all the three correct statements regarding beri-beri –
(a) A crippling disease prevalent among the native population of sub-Saharan Africa

(b) A deficiency disease caused by lack of thiamine (vitamin B\(_1\))

(c) A nutritional disorder in infants and young children when the diet is persistently deficient in essential protein

(d) Occurs in those countries where the staple diet is polished rice

(e) The symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure

Which of the following unicellular organism has a macronucleus for trophic function and one or more micronuclei for reproduction –

Protein synthesis in an animal cell occurs –

Centromere is required for –

Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain-

Carbohydrates, the most abundant biomolecules on earth, are produced by –

Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example

Which one of the following represents an ovule, where the embryo sac becomes horse- shoe shaped and the funiculus and micropyle are close to each other –

Three crops that contribute maximum to global food grain production are –

Telomerase is an enzyme which is a –

In order to find out the different types of gametes produced by a pea plants having the genotype AaBb, it should be crossed to a plant with the genotype –

Prolonged liberal irrigation of agricultural fields is likely to create the problem of –

According to widely accepted “fluid mosaic model” cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements are incorrect –

There exists a close association between the alga and the fungus within a lichen. The fungus –

In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues –

Which of the following is not a hereditary disease –

Which of the following is the relatively most accurate method for dating of fossils –

More than 70% of world’s fresh water is contained in –

A woman with normal vision, but whose father was colour bind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. This boy –

production of a human protein in bacteria by genetic engineering is possible because

Which of the following substances, if introduced into the blood stream, would cause coagulation of blood at the site of its introduction –

The world’s highly prized wool yielding ‘Pashmina’ breed is –

Photosynthesis in \(C_4\) plants is relatively less limited by atmospheric \(CO_2\) levels because

One of the examples of the action of the autonomous nervous system is –

At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell –

During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at the point. What is the sequence called –

The main organelle involved in modification and routing of newly synthesized proteins to their destinations is –

Damage to thymus in a child may lead to

Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness –

Why is vivipary an undersirable character for annual crop plants –

There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variation of DNA however suggested African origin of modern man. What kind of observation of DNA variation could suggest this –

Which of the following is not true for a species –

Photosynthetic Active Radiation (PAR) has the following range of wavelengths

Haemophilia is more commonly seen in human males than in human females because –

Chlorophyll in chloroplasts is located in –

AIDS is caused by HIV that principally infects

Which one of the following pairs in mismatched-

In which one pair both the plants can be vegetatively propagated by leaf pieces –

parkinson’s disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter –

A women with 47 chromosomes due to three copies of chromosome 21 is characterized by –

A man and a women, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughter and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease

At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation –

In a man, abduncens nerve is injured. Which one of the following functions will be affected

De Vries gave his mutation theory on organic evolution while working on –

Genes for cytoplasmic male sterility in plants are generally located in –

A patient is generally advised to specially consume more meat, lentils, milk and eggs in diet only when he suffers from –

Barophilic prokaryotes –

An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the –

Potometer works on the principle of –

The ability of the Venus Flytrap to capture insects is due to –

Which of the following pairs, is correctly matched –

According to IUCN Red List, what is the status of Red Panda (Ailurus fulgens) ?

A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of –

For retting of Jute the fermenting microbe used is –