NEET 2014 — Code S

The mean free path of molecules of a gas, (radius ‘r’) is inversely proportional to -

A particle is moving such that its position coordinates (x, y) are (2m, 3m) at time t = 0. (6m, 7m) at time t = 2 s and (13m, 14m) at time t = 5s. Average velocity vector       → av V from t = 0 to t = 5 s is -

Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by -

When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is

In an ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, the resistance of ammeter will be :

A balloon with mass ‘m’ is descending down with an acceleration ‘a’ (where a < g). How much mass should be removed from it so that it starts moving up with an acceleration ‘a’ ?

The Binding energy per nucleon of Li 7 3 and He 4 2 nuclei are 5.60 MeV and 7.06 MeV, respectively. In the nuclear reaction Q He He H Li 4 2 4 2 1 1 7 3 + + → + , the value of energy Q released is

The angle of a prism is 'A'. One of its refracting surfaces is silvered. Light rays falling at an angle of incident 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index μ, of the prism is

The resistance in the two arms of the meter bridge are 5 Ω and R Ω , respectively. When the resistance R is shunted with an equal resistance, the new balance points is at 1.6 l 1 . The resistance 'R', is : G 5 Ω R Ω A B l 1 100 – l 1

Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 volt and the average resistance per km is 0.5 Ω . The power loss in the wire is :

A system consists of three masses m 1 , m 2 and m 3 connected by a string passing over a pulley P. The mass m 1 hangs freely and m 2 and m 3 are on a rough horizontal table (the coefficient of friction = μ ). The pulley is frictionless and of negligible mass. The downward acceleration of mass m 1 is – (Assume m 1 = m 2 = m 3 = m) P m 1 m 2 m 3

If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-Broglie wavelength of the particle is :

A beam of light of λ = 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2m away. The distance between first dark fringes on either side of the central bright fringe is :

A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass = 5.98 × 10 24 kg) have to be compressed to be a black hole ?

The oscillation of a body on a smooth horizontal surface is represents by the equation X = A cos ( ω t) where X = displacement at time t ω = frequency of oscillation Which one of the following graph shows correctly the variation ‘a’ with ‘t’ ?

A solid cylinder of mass 50 kg and radius 0.5 m is free to rotate about the horizontal axis. A massless string is wound round the cylinder with one end attached to it and other hanging freely. Tension in the string required to produce an angular acceleration of 2 revolutions s –2 is -

The ratio of the accelerations for a solid sphere (mass ‘m’ and radius ‘R’) rolling down an incline of angle ‘ θ ’ without slipping and slipping down the incline without rolling is -

A thin semicircular conducting ring (PQR) of radius 'r' is falling with its plane vertical in a horizontal magnetic field B. The potential difference developed across the ring when its speed is v, is:

In the Young's double-silt experiment, the intensity of light at a point on the screen where the path difference is λ is K, ( λ being the wave length of light used). The intensity at a point where the path difference is λ /4, will be

A radio isotope 'X' with a half life 1.4 × 10^9 years decays to 'Y' which is stable. A sample of the rock from a cave was found to contain 'X' and 'Y' in the ratio 1 : 7. The age of the rock is :

Light with an energy flux of 25 × 10 4 Wm –2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15 cm 2 , the average force exerted on the surface is

Certain quantity of water cools from 70ºC to 60ºC in the first 5 minutes and 60ºC to 54ºC in the next 5 minutes. The temperature of the surroundings is -

A monoatomic gas at a pressure P, having a volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is – (take γ = 5/3)

A projectile is fired from the surface of the earth with a velocity of 5 ms –1 and angle θ with the horizontal. Another projectile fired from another planet with a velocity of 3 ms –1 at the same angle follows a trajectory which is identical with the trajectory of the projectile fired from the earth. The value of the acceleration due to gravity on the planet is (in ms –1 ) - (given g = 9.8 ms –2 )

In a region the potential is represented by V(x, y, z) = 6x – 8xy – 8y + 6yz, where V is in volts and x, y, z are in meters. The electric force experienced by a charge of 2 coulomb situated at point (1, 1, 1) is

Hydrogen atom in ground state is excited by a monochromatic radiation of λ = 975 Å. Number of spectral lines in the resulting spectrum emitted will be

The barrier potential of a p-n junction depends on : (a) type of semiconductor material (b) amount of doping (c) temperature Which one of the following is correct?

If n 1 , n 2 and n 3 are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency n of the string is given by -

If force (F), velocity (V) and time (T) are taken as fundamental units, then the dimensions of mass are -

If the focal length of objective lens is increased then magnifying power of :

A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4m long. When the resistance, R, connected across the given cell, has values of. (i) infinity (ii) 9.5 Ω the 'balancing lengths', on the potentiometer wire are found to be 3 m and 2.85 m, respectively. The value of internal resistance of the cell is

Copper of fixed volume ‘V’ is drawn into wire of length ‘ l ’. When this wire is subjected to a constant force ‘F’, the extension produced in the wire is ‘ ∆ l ’. Which of the following graphs is a straight line ?

Two identical long conducting wires AOB and COD are placed at right angle to each other, with one above other such that 'O' is their common point for the two. The wires carry I 1 and I 2 currents, respectively. Point 'P' is lying at distance 'd' from 'O' along a direction perpendicular to the plane containing the wires. The magnetic field at the point 'P' will be :

Two thin dielectric slabs of dielectric constants K 1 and K 2 (K 1 < K 2 ) are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field 'E' between the plates with distance 'd' as measured from plate P is correctly shown by : + + + + + + K 1 – – – – – – K 2 P Q

The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz are - (velocity of sound = 340 ms –1 )

A thermodynamic system undergoes a cyclic process ABCDA as shown in the figure. The work done by the system in the cycle is -

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6A, the voltage across the secondary coil and the current in the primary coil respectively are :

Steam at 100ºC is passed into 20 g of water at 10ºC. When water acquires a temperature of 80ºC, the mass of water present will be - [Take specific heat of water = 1 cal g –1 ºC –1 and latent heat of steam = 540 cal g –1 ]

Following figures show the arrangement of bar magnets in different configurations. Each magnet has a magnetic dipole moment \( m \). Which configuration has the highest net magnetic dipole moment? (a) N S S N (b) S N N S (c) S N N 30º (d) S N N 60º

A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are :

A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (m) move perpendicular to each other with equal speeds (v). The total kinetic energy generated due to explosion is -

The force ‘F’ acting on a particle of mass ‘m’ is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is - 6 3 0 –3 6 8 4 2 t(s) F(N)

A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36 km/hour. He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz. If the speeds of sound is 343 m/s, the frequency of the honk as heard by him will be :-

A certain number of spherical drops of a liquid of radius ‘r’ coalesce to form a single drop of radius ‘R’ and volume ‘V’. If ‘T’ is the surface tension of the liquid, then -

The given graph represents V-I characteristic for a semiconductor device. B V → A ↑ I Which of the following statement is correct?

Planaria possesses high capacity of -

An example of ex situ conservation is -

To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken ?

The motile bacteria are able to move by -

A marine cartilaginous fish that can produce electric current is -

You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two ?

In a population of 1000 individuals 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is -

Fructose is absorbed into the blood through mucosa cells of intestine by the process called -

Which of the following causes an increase in sodium reabsorption in the distal convoluted tubule -

A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white-coloured like albinos. Which of the following terms will you use to describe them ?

Stimulation of a muscle fiber by a motor neuron occurs at -

In vitro clonal propagation in plants is characterized by -

Deficiency symptoms of nitrogen and potassium are visible first in -

Fight-or-flight reaction cause activation of -

If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain ? plant → mice → snake → peacock

Male gametophyte with least number of cells is present in -

A scrubber in the exhaust of a chemical industrial plant removes -

Fruit colour in squash is an example of -

A location with luxuriant growth of lichens on the trees indicates that the -

At which stage of HIV infection does one usually show symptoms of AIDS ?

The first human hormone produced by recombinant DNA technology is -

The main function of mammalian corpus luteum is to produce -

In which one of the following processes CO 2 is not released ?

The zone of atmosphere in which the ozone layer is present is called -

Transformation was discovered by -

Select the option which is not correct with respect to enzyme action -

Which one of the following is wrongly matched ?

Which one of the following statement is not correct ?

During which phase(s) of cell cycle, amount of DNA in a cell remains of 4C level if the initial amount is denoted as 2C ?

Non-albuminous seed is produced in -

Select the Taxon mentioned that represent both marine and fresh water species -

Five kingdom system of classification suggested by R.H. Whittaker is not based on -

Select the correct option - Direction of RNA synthesis Direction of reading of the template DNA strand

Given below is the representation of the extent of global diversity of invertebrates. What do the four portions (A-D) represent respectively?

An analysis of chromosomal DNA using the Southern hybridization technique does not use-

Which is the particular type of drug that is obtained from the plant whose one flowering branch is shown below ?

Assisted reproductive technology, IVF involves transfer of -

Which of the following is responsible for peat formation ?

Select the correct option describing gonadotropin activity in a normal pregnant female -

Tubectomy is a method of sterilization in which-

Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleptile stumps. of what significance is this experiment ?

Person with blood group AB is considered as universal recipient because he has -

Function of filiform apparatus is to -

Injury localized to the hypothalamus would most likely disrupt -

Which one of the following living organisms completely lacks a cell wall ?

Which of the following is a hormone releasing Intra Uterine Device (IUD) ?

Archaebacteria differ from eubacteria in -

Tracheids differ from other tracheary elements in -

Which one of the following shows isogamy with non-flagellated gametes ?

A species facing extremely high risk of extinction in the immediate future is called -

Viruses have -

Anoxygenic photosynthesis is characteristic of-

Commonly used vectors for human genome sequencing are -

Which one of the following fungi contains hallucinogens ?

Which structures perform the function of mitochondria in bacteria ?

In 'S' phase of the cell cycle -

When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as -

A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind ?

Which one of the following is a non-reducing carbohydrate ?

Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of-

Which one of the following statements is correct ?

Pollen tablets are available in the market for -

Which one of the following is wrong about Chara ?

The initial step in the digestion of milk in humans is carried out by -

The shared terminal duct of the reproductive and urinary system in the human male is -

An example of edible underground stem is -

An aggregate fruit is one which develops from-

Which one of the following growth regulators is known as 'stress hormone' ?

Which of the following shows coiled RNA strand and capsomeres ?

An alga which can be employed as food for human being is -

Choose the correctly matched pair -

Which one of the following are analogous structures ?

Approximately seventy percent of carbon- dioxide absorbed by the blood will be transported to the lungs -

The osmotic expansion of a cell kept in water is chiefly regulated by -

Placenta and pericarp are both edible portions in -

The organization which publishes the Red List of species is -

What gases are produced in anaerobic sludge digesters ?

Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to -

Choose the correctly matched pair -

Geitonogamy involves -

A human female with Turner's syndrome -

The enzyme recombinase is required at which stage of meiosis -

Identify the hormone with its correct matching of source and function -

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as -

How do parasympathetic neural signals affect the working of the heart ?

Select the correct matching of the type of the point with the example in human skeletal system - Type of joint Example

Which vector can clone only a small fragment of DNA ?

Which of the following compounds will undergo racemisation when solution of KOH hydrolyses? (i) CH 2 Cl (ii) CH 3 CH 2 CH 2 Cl (iii) H 3 C – CH – CH 2 Cl | CH 3 (iv) C | CH 3 | C 2 H 5 Cl H

Which of the following statements is correct for the spontaneous adsorption of a gas ?

For the reversible reaction: N 2 (g) + 3H 2 (g) 2NH 3 (g) + heat The equilibrium shifts in forward direction:

Using the Gibbs energy change, ∆ Gº = + 63.3 kJ, for the following reaction, Ag 2 CO 3 (s) 2Ag + (aq) + − 2 3 CO (aq) The K sp of Ag 2 CO 3 (s) in water at 25ºC is: (R = 8.314 J K –1 mol –1 )

Magnetic moment 2.83 BM is given by which of the following ions? (At. no. Ti = 22, Cr = 24, Mn = 25, Ni = 28)

Which one of the following is not a common component of Photochemical Smog?

For the reaction: X 2 O 4 ( l ) → 2XO 2 (g) ∆ U = 2.1 k cal, ∆ S = 20 cal K –1 at 300 K Hence, ∆ G is:

Which one of the following species has plane triangular shape ?

Which of the following organic compounds polymerizes to form the polyester Dacron?

Among the following complexes the one which shows Zero crystal field stabilisation energy (CFSE) is:

Acidity of diprotic acids in aqueous solutions increases in the order:

When 0.1 mol − 2 4 MnO is oxidized the quantity of electricity required to completely oxidize − 2 4 MnO to − 4 MnO is:

1.0 g of magnesium is burnt with 0.56g O 2 in a closed vessel. Which reactant is left in excess and how much ? (At. wt. Mg = 24; O = 16)

Which property of colloids is not dependent on the charge on colloidal particles ?

In the following reaction, the product (A) is : N ≡ NCl – + + N H 2 dye Yellow H ) A (  →  +

Identify Z in the sequence of reactions: \[ Z \xrightarrow{\text{NaOH, } \Delta} Y \xrightarrow{\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{CH}_2\text{Br}} \text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{CH}_2\text{CH}_2\text{OH} \]

Which of the following salts will give highest pH in water ?

Which of the following molecules has the maximum dipole moment ?

For a given exothermic reaction, K P and K' P are the equilibrium constant at temperatures T 1 and T 2 , respectively. Assuming that heat of reaction is constant in temperature range between T 1 and T 2 , it is readily observed that-

Be 2+ is isoelectronic with which of the following ions ?

What is the maximum number of orbitals that can be identified with the following quantum numbers n = 3, l = l, m l = 0

Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings?

Which of the following orders of ionic radii is correctly represented ? (1) H – > H + > H (2) Na + > F – > O 2– (3) F – > O 2– > Na + (4) Al 3+ > Mg 2+ > N 3– Ans. [Bonus] Sol. All option are incorrect order of ionic radius Ionic radius H – > H + > H Na + > F – > O –2 F – > O –2 > Na + Al +3 > Mg +2 > N –3 Correct order of ionic radius are

Which of the following complexes is used to be as an anticancer agent ?

Reason of lanthanoid contraction is :

(a) H 2 O 2 + O 3 → H 2 O + 2O 2 (b) H 2 O 2 + Ag 2 O → 2Ag + H 2 O + O 2 Role of hydrogen peroxide in the above reactions is respectively:

Calculate the energy in joule corresponding to light of wavelength 45 nm: (Planck constant h = 6.63 × 10 34 Js, speed of light c = 3 × 10 8 ms –1 )

Which one of the following is an example of a thermosetting polymer ?

Equal masses of H 2 ,O 2 and methane have been taken in a container of volume V at temperature 27ºC in identical conditions. The ratio of the volumes of gases H 2 : O 2 : methane would be:

The weight of silver (at. wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of O 2 at STP will be:

Of the following 0.10m aqueous solutions, which one will exhibit the largest freezing point depression ?

Which of the following will not be soluble in sodium hydrogen carbonate ?

Which of the following will be most stable diazonium salt − + X RN 2 ?

The pair of compounds that can exist together is:

Which of the following organic compounds has same hybridization as its combustion product – (CO 2 )?

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1M H 2 SO 4 . The percentage of nitrogen in the soil is :

Which one is most reactive towards Nucleophilic addition reaction ?

What products are formed when the following compound is treated with Br 2 in the presence of FeBr 3 ? CH 3 CH 3

Among the following sets of reactants which one produces anisole ?

When 22.4 litres of H 2 (g) is mixed with 11.2 litres of Cl 2 (g), each at S.T.P., the moles of HCl(g) formed is equal to:

The reaction of aqueous KMnO 4 with H 2 O 2 in acidic conditions gives:

In acidic medium, H 2 O 2 changes 2 7 2 O Cr − to CrO 5 which has two (–O–O–) bonds. Oxidation state of Cr in CrO 5 is:

Artificial sweetner which is stable under cold conditions only is:

D(+) glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be :

If a is the length of the side of a cube, the distance between the body centred atom and one corner atom in the cube will be: