NEET-UG 2013 Question Paper

In an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively.

Quantity P is calculated as follows P = a³b²/cd % error in P is:

A stone falls freely under gravity. It covers distances h₁, h₂ and h₃ in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relation between h₁, h₂ and h₃ is

The velocity of a projectile at the initial point A is (2î + 3ĵ) m/s. It's velocity (in m/s) at point B is

The upper half of an inclined plane of inclination θ is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between the block and lower half of the plane is given by

A uniform force of (3î + ĵ) newton acts on a particle of mass 2 kg. The particle is displaced from position (2î+ k̂) meter to position (4î + 3 ĵ - k̂) meter. The work done by the force on the particle is

An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12 ms⁻¹ and the second part of mass 2 kg moves with speed 8 ms⁻¹. If the third part flies off with speed 4 ms⁻¹ then its mass is

A rod PQ of mass M and length Lis hinged at end P. The rod is kept horizontal by a massless string tied to point Q as shown in figure. When string is cut, the initial angular acceleration of the rod is

A small object of uniform density rolls up a curved surface with an initial velocity 'v'. It reaches upto a maximum height of 3v² / 4g with respect to the initial position. The object is a

A body of mass 'm' is taken from the earth's surface to the height equal to twice the radius (R) of the earth. The change in potential energy of body will be

Infinite number of bodies, each of mass 2 kg are situated on x-axis at distances 1m, 2m, 4m, 8m, ..... respectively, from the origin. The resulting gravitational potential due to this system at the origin will be

The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?

The wetability of a surface by a liquid depends primarily on

A piece of iron is heated in a flame. It first becomes dull red, then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using

A gas is taken through the cycle A →B → C → A, as shown in figure. What is the net work done by the gas?

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio of Cp / Cv for the gas is

In the given (V - T) diagram, what is the relation between pressure P₁ and P₂?

The amount of heat energy required to raise the temperature of 1g of Helium at NTP, from T₁ K to T₂ K is

The molar specific heats of an ideal gas at constant pressure and volume are denoted by Cₚ and Cᵥ, respectively. If γ = Cp / Cv and R is the universal gas constant, then Cᵥ is equal to

A wave travelling in the +ve x-direction having displacement along y-direction as 1m, wavelength 2π m and frequency 1/π Hz is represented by

If we study the vibration of a pipe open at both ends, then which of the following statements is not true?

A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz. The unknown frequency is

Two pith balls carrying equal charges are suspended from a common point by strings of equal length. The equilibrium separation between them is r. Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now become

A, B and C are three points in a uniform electric field. The electric potential is

A wire of resistance 4 Ω is stretched to twice its original length. The resistance of stretched wire would be

The resistance of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 10 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively. If the galvanometer resistance is 50 ohm, the current drawn from the cell will be

When a proton is released from rest in a room, it starts with an initial acceleration a₀ towards west. When it is projected towards north with a speed v₀ it moves with an initial acceleration 3a₀towards west. The electric and magnetic fields in the room are respectively

A current loop in a magnetic field

A bar magnet of length 'l' and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be

A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is

A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is

A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices μ₁ and μ₂ and R is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is

For a normal eye, the cornea of eye provides a converging power of 40D and the least converging power of the eye lens behind the cornea is 20D. Using this information, the distance between the retina and the eye lens of the eye can be estimated to be

In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ_1 = 12000Å and λ_2 = 10000Å. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other ?

A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of the following statements is correct ?

The wavelength λ_e of an electron and λ_p of a photon are of same energy E are related by

For photoelectric emission from certain metal the cut-off frequency is ν. If radiation of frequency 2ν impinges on the metal plate, the maximum possible velocity of the emitted electron will be (m is the electron mass)

In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is

A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction is 0.02866 a.m.u. The energy liberated per a.m.u. is (Given : 1 a.m.u = 931 MeV)

The half life of a radioactive isotope 'X' is 20 years. It decays to another element 'Y' which is stable. The two elements 'X' and 'Y' were found to be in the ratio of 1 : 7 in a sample of a the given rock. The age of the rock is estimated to be

In a n-type semiconductor, which of the following statement is true?

In a common emitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and current gain 25. If the above transistor is replaced with another one with transconductance 0.02 mho and current gain 20, the voltage gain will be

The output(X) of the logic circuit shown in figure will be

Three blocks with masses m, 2 m and 3 m are connected by strings as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 2m? (g is the acceleration due to gravity)

The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 Ω is

6.02 × 10²⁰ molecules of urea are present in 100 mL of its
solution. The concentration of solution is :

The value of Planck's constant is 6.63 × 10⁻³⁴ Js. The speed of light is 3 × 10⁻¹⁷ nm s⁻¹. Which value is closest to the
wavelength in nanometer of a quantum of light with frequency of 6 × 10¹⁵ s⁻¹?

Based on equation E = -2.178 × 10⁻¹⁸ (Z² / n²) J, certain conclusions are written. Which of them is not correct ?

What is the maximum numbers of electrons that can be associated with the following set of quantum numbers?
n = 3, l = 1 and m = -1

Which of the following is electron - deficient?

Which of the following is a polar molecule?

XeF₂ is isostructural with

Which of the following is paramagnetic?

Which one of the following molecules contains no pi bond?

Dipole-induced dipole interactions are present in which of the following pairs:

Maximum deviation from ideal gas is expected from:

Which of these is least likely to act as Lewis base?

Identify the correct order of solubility in aqueous medium:

Which of the following structure is similar to graphite?

Which of these is not a monomer for a high molecular mass silicone polymer?

The basic structural unit of silicates is:

Structure of the compound whose IUPAC name is 3-ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is:

The structure of isobutyl group in an organic compound is:

The radical, is aromatic because it has:

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?

Which of the following compounds will not undergo Friedel-Craft's reaction easily:

Roasting of sulphides give the gas X as a by product. This is colorless gas with choking smell of burnt sulphur and caused great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as a reducing agent and its acid has never been isolated. The gas X is:

Which of the following statements about the interstitial compounds is incorrect?

The number of carbon atoms per unit cell of diamond unit cell is:

A metal has an fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm⁻³. The molar mass of the metal is: (Na, Avogadro's constant = 6.02 * 10²³ mol⁻¹)

How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0M HNO₃ ? The concentrated
acid is 70% HNO₃

At 25°C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm⁻¹ cm²mol⁻¹ and at
infinite dilution its molar conductance is 238 ohm⁻¹ cm² mol⁻¹ . The degree or ionisation of ammonium hydroxide at
the same concentration and temperature is

A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be ?

A button cell used in watches functions as following:
Zn(s) + Ag₂O(s) + H₂O(l) ⇄ 2Ag(s) + Zn²⁺(aq) + 2OH⁻(aq)

If half cell potentials are:
Zn²⁺(aq) + 2e⁻→Zn(s); E° = -0.76 V
Ag2O(s) + H₂O(l) + 2e⁻→ 2Ag(s) + 2OH⁻(aq); E° = 0.34 V

The cell potential will be:

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20°C to 35°C?

(R = 8.314 J mol⁻¹ K⁻¹)

A reaction having equal energies of activation for forward and reverse reaction has:

Which of the following does not give oxygen on heating?

Which is the strongest acid in the following:

Which of the following lanthanoid ions is diamagnetic?
(At. nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)

KMnO₄ can be prepared from K₂MnO₄ as per the reaction:
3MnO₄²- + 2H₂O <=> 2MnO₄⁻ + MnO₂ + 4OH⁻

The reaction can go to completion by removing OH^- ions by adding:

An excess of AgNO₃ is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium (III) chloride. The number of moles of AgCl precipitated would be:

A magnetic moment of 1.73 BM will be shown by one among the following:

Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI?

Reaction by which Benzaldehyde cannot be prepared:

The order of stability of the following tautomeric compounds is:

In the reaction

A is:

Nitrobenzene on reaction with conc. HNO₃ / H₂SO₄ at 80-100°C forms which one of the following products?

Nylon is an example of:

Which is the monomer of Neoprene in the following?

Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true

Which one of the following is not a correct statement?

Which of the following are likely to be present in deep sea water?

Isogamous condition with non-flagellated gametes is found in

Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?

Besides paddy fields cyanobacteria are also found inside vegetative part of

Read the following statements (A-E) and answer the question which follows them.

A. In liverworts, mosses and ferns gametophytes are free-living

B. Gymnosperms and some ferns are heterosporous.

C. Sexual reproduction in Fucus, Volvox and Albugo is oogamous

D. The sporophyte in liverworts is more elaborate than that in mosses

E. Both, Pinus and Marchantia are dioecious

How many of the above statements are correct?

Which group of animals belong to the same phylum?

One of the representatives of phylum Arthropoda is

Which of the following are correctly matched with respect to their taxonomic classification

Match the name of the animal (column I), with one characteristics (column II), and the phylum/class (column III) to which it belongs:

Among bitter gourd, mustard, brinjal, pumpkin, china rose, lupin, cucumber, sunhemp, gram, guava, bean, chilli, plum, petunia, tomato, rose, withania, potato, onion, aloe and tulip how many plants have hypogynous flower?

In china rose the flowers are:

Age of a tree can be estimated by:

Lenticels are involved in:

Interfascicular cambium develops from the cells of:

What external changes are visible after the last moult of a cockroach nymph?

Which one of the following organelle in the figure correctly matches with its function?

The Golgi complex plays a major role :

A major site for synthesis of lipids is :

A phosphoglyceride is always made up of :

The essential chemical components of many coenzymes are :

Transition state structure of the substrate formed during an enzymatic reaction is :

Macro molecule chitin is :

A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics.

The complex formed by a pair of synapsed homologous chromosomes is called :

Which of the following criteria does not pertain to facilitated transport?

The first stable product of fixation of atmospheric nitrogen in leguminous plants is :

Pigment-containing membranous extensions in some cyanobacteria are :

Which of the metabolites is common to respiration-mediated breakdown of fats, carbohydrates and proteins

The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent reactants or products.

Arrows numbered 4, 8 and 12 can all be :

During seed germination its stored food is mobilized by :

Select the correct match of the digested products in humans given in column - I with their absorption site and mechanism in column-II

The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and/or characteristics.

Figure shows schematic plan of blood circulation in humans with labels A to D. Identify the label and give its function's.

The diagram given here is the standard ECG of a normal person the P-wave represents the

Figure shown human urinary system with structures labelled A to D. Select option which correctly identifies them and gives their characteristics and/or functions.

The H-zone in the skeletal muscle fibre is due to:

The characteristics and an example of a synovial joint in humans is :
Characteristics | Examples

Select the correct statement with respect to locomotion in humans :

The most abundant intracellular cation is :

A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-D.

Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics :

Which of the following statements is correct in relation to the endocrine system?

A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abnormal skin. This is the result of :

Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom:

Select the wrong statement:

Monoecious plant of Chara shows occurrence of :

Meiosis takes place in :

Megasporangium is equivalent to

Advantage of cleistogamy is :

Product of sexual reproduction generally generates :

Which one of the following statements is correct?

Perisperm differs from endosperm in :

Seed coat is not thin, membranous in:

Menstrual flow occurs due to lack of :

Which one of the following is not the function of placenta? It :

Which of the following cannot be detected in a developing foetus by amniocentesis?

One of the legal methods of birth control is:

Artificial insemination means:

If two persons with 'AB' blood group marry and have sufficiently large number of children these children could be classified as 'A' blood group: 'AB' blood group: 'B' blood group in 1 : 2 : 1 ratio. Modern technique of protein electrophoresis reveals presence of both 'A' and 'B' type proteins in 'AB' blood group individuals. This is an example of:

Which Mendelian idea is depicted by a cross in which the F₁ generation resembles both the parents?

Which of the following statements is not true of two genes that show 50% recombination frequency?

If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?

The incorrect statement with regard to Haemophilia is:

The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C.

Which enzymes will be produced in a cell in which there is a nonsense mutation in the lac Y gene?

The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of

The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge, is called:

Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as:

According to Darwin, the organic evolution is due to:

Infection of Ascaris usually occurs by:

The cell-mediated immunity inside the human body is carried out by:

In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called:

During sewage treatment, biogases are produced which include :

A good producer of citric acid is:

The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of:

DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by:

Which of the following Bt crops is being grown in India by the farmers?

A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is:

A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is:

Which one of the following processes during decomposition is correctly described?

Secondary productivity is rate of formation of new organic matter by:

Natural reservoir of phosphorus is:

Which of the following represent maximum number of species among global biodiversity?

Which one of the following is not used for ex-situ plant conservation?

The Air (Prevention and Control of Pollution) Act came into force in:

Kyoto Protocol was endorsed at:

Global warming can be controlled by:

The first stable product of fixation of atmospheric nitrogen in leguminous plants is:

Which of the following metabolites is common to respiration-mediated breakdown of fats, carbohydrates and proteins?