Official NEET UG 2014

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

A projectile is fired from the surface of the earth with a velocity of \(5 ms^{–1}\) and angle \(\theta\) 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 \( ms^{–2}\)) given \(g = 9.8 m/s^{2}\)

A particle is moving such that its position coordinate (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 \(( \overrightarrow{V}_{av} )\) from t = 0 to t = 5 s 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 = \(\mu \)). The pulley is frictionless and of negligible mass. The downward acceleration of mass \(m_{1}\) is : (Assume \(m_{1} = m_{2} = m_{3} = m\))

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 :-

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’ ?

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 oscillation of a body on a smooth horizontal surface is represented by the equation,

\(X = A cos(\omega t) \)

where   X = displacement at time t
\(\omega \)= frequency of oscillation
Which one of the following graphs 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 soldi sphere (mass ‘m’ and radius ‘R’) rolling down an incline of angle ‘\(\theta \)’ without slipping and slipping down the incline without rolling 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 = \(5.98 \times 10^{24}kg\)) have to be compressed to be a black hole ?

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

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 ‘\(\Delta l\)’. Which of the following graphs is a straight line ?

A certain number of sphereical 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 :

Steam at \(100^{\circ}C\) is passed into 20 g of water at \(10^{\circ}C\). When water acquires a temperature of \(80^{\circ}C\), the mass of water present will be :

[Take specific heat of water = 1 cal \(1 cal g–^{1} °C–^{1}\)and latent heat of steam = 540 cal \(g^{-1}\)]

Certain quantity of water cools from \(70^{\circ}\)C to \(60^{\circ}\)C in the first 5 minutes and to \(54^{\circ}\)C 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 adibatically to a volume 16V. The final pressure of the gas is : (take \(\gamma =\frac{5}{3}\) )

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

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

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 :-

The number of possible natural oscillation 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 speeding motorcyclist sees trafic 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 :-

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 :-

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

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 metres. The electric force experienced by a charge of 2 coulomb situated at point (1, 1, 1) is :-

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 \(\Omega\). the power loss in the wires is :-

The resistance in the two arms of the meter bridge are 5\(\Omega\) and R\(\Omega\) , respectively. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6 \(l_{1}\). The resistance ‘R’ is :-

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 resistace R, connected across the given cell, has values of.
(i) infinity

(ii) 9.5 \(\Omega\)
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

Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment \(\overrightarrow{m}\) . Which configuration has highest net magnetic diple moment ?

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

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 :-

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

A transformer having efficiency of 90% is working on 200V and 3kW 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 :-

Light with an energy flux of \(25\times 10^{4} Wm^{-2}\) 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 :-

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

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

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

The angle of a prism is ‘A’. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index \(\mu\), of the prism is :-

When the energy of the incident radiation is incredased 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 :-

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 :-

Hydrogne atom is ground state is excited by a monochromatic radiation of \(\lambda\) = 975 Å. Number of spectral lines in the resulting spectrum emitted will be

The Binding energy per nucleon of \(_{3}^{7}\textrm{Li}\) and \(_{2}^{4}\textrm{He}\) nuclei are 5.60 MeV and 7.06 MeV, respectively.In the nuclear reaction \(_{3}^{7}\textrm{Li}+_{1}^{1}\textrm{H} \rightarrow_{2}^{4}\textrm{He}\)+Q, the value of energy Q released is :-

A radio isotope ‘X’ with a half life \(1.4\times 10^{9}\) 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 :

The given graph represents V – I characteristic for a semiconductor device.

Which of the following statement is correct ?

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

What is the maximum number of orbitals that can be identified with the following quantum numbers?

n = 3, \(\iota\) = 1, \(m_{\iota }\) = 0

Calculate the energy in joule corresponding to light of wavelength 45 nm : (Planck’s constant h = \(6.63\times 10^{-34}\) Js; speed of light c = \(3\times 10^{8}ms^{-1}\))

Equal masses of \(H_{2},O_{2}\) and methane have been taken in a container of volume V at temeprature \(27^{\circ}\)C in identical conditions. The ratio of the volumes of gases \(H_{2} : O_{2}\) : methane would be :

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

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

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

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

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 :-

When 0.1 mol \(MnO_{4}^{2-}\) is oxidised the quantity of electricity required to completely oxidise  \(MnO_{4}^{2-}\) to \(MnO_{4}^{-}\) is :-

Using the Gibbs energy change, \(\Delta G^{\circ}\) = + 63.3kJ,for the following raction,
\(Ag_{2}CO_{3} \rightleftharpoons 2Ag+ (aq)+CO_{3}^{2-}(aq)\)
the \(K_{sp}\) of \(Ag_{2}CO_{3}\)(s) in water at \(25^{\circ}\)C is :- (R = 8.314 J \(K^{-1}mol^{-1}\))

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

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

For the reaction :

\(X_{2}O_{4}(\iota)\rightarrow2XO_{2}(g)\)

\(\Delta\) U = 2.1 k cal, \(\Delta\) S = 20 cal K\(^{-1}\) at 300 K

Hence \(\Delta\) G is :-

For a given exothermic reaction, \(K_{p}\) and \(K_{p}^{1}\) are the equilibrium constants 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 :-

Which of the following orders of ionic radii is correctly represented ?

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

The pair of compounds that can exist together is:-

The pair of compounds that can exist together is:-

\(Be^{2+}\) is isoelectronic with which of the following ions ?

Which of the following molecules has the maximum dipolement ?

Which one of the following species has plane triangular shape ?

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

(a) \(H_{2}O_{2} + O_{3}\rightarrow H_{2}O + 2O_{2}\)

(b) \(H_{2}O_{2} + Ag_{2}O \rightarrow 2Ag+H_{2}O + O_{2}\)

Role of hydrogen peroxide in the above reactions is respectively –

Artificial sweetner which is stable under cold conditions only is :-

In acidic medium, \(H_{2}O_{2}\) changes \(Cr_{2} O_{7}^{-2}\)to \(CrO_{5}\) which has two (-O-O) bonds. Oxidation state of Cr in \(CrO_{5}\) is :-

The reaction of aqueous \(KMnO_{4}\) with \(H_{2}O_{2}\) in acidic conditions gives :-

Among the following complexes the one which shows Zero crystal field stabilization energy (CFSE):-

Magnetic moment 2.83 BM is given by which of the following ions ?
(At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28):-

Which of the following complexes is :-

Reason of lanthanoid contraction is :-

In the following reaction, the product (A)

Which of the following will be most stable diazonium salt \(RN_{2}^{+} X^{-}\) ?

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

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

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

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

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

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 1 M \(H_{2}SO_{4}\). The percentage of nitrogen in the soil is :

What products are formed when the following compounds is treated with B\(r_{2}\) in the presence of FeB\(r_{3}\)?

Which of the following compounds will undergo racemisation when solution of KOH hydrolyses?

Among the following sets of reactants which one produces anisole?

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

Which one is most reactive towards Nucleophilic addition reaction?

Identify Z in the sequence of reactions:\(CH_{3}CH_{2}CH = CH_{1}\)\( HBr\overset{hb_{r}/h_{2}o_{2}}{\rightarrow}/H2O2 Y  C H ONa 2 5 Z\overset{c_{2}h_{5}ON_{a}}{\rightarrow}\)

Which of the following organic compounds has same hybridization as its combustion product\((CO_{2})\)

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

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

Which one of the following fungi contains hallucinogens ?

Archaebacteria differ from eubacteria in:

Which one of the following is wrong about Chara?

Placenta and pericarp are both edible portions in:

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

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?

Which one of the following statements is correct ?

Tracheids differ from other tracheary elements in :

An example of ediple underground stem is

Which structures perform the function of mitochondria in bacteria ?

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

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

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

Match the following and select the correct answer :

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 coleoptile stumps. Of what significance is this experiment ?

Deficiency symptoms of nitrogen and potassium are visible first in :

In which one of the following processes CO\(_2\) in not released ?

Anoxygenic photosynthesis is characteristic of :

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?

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

Geitonogamy involves :

Male gametopyte with least number of cell is present in :

An aggregate fruit is one which develops from :

Pollen tablets are available in the market for :

Function of filiform apparatus is to :-

Non-albuminous seed is produced in :-

Which of the following shows coiled RNA strand and capsomeres?

Which one of the following is wrongly matched?

Transformation was discovered by :-

Fruit colour in squash in an example of :-

Viruses have :-

The first human hormone produced by recombinant DNA technology is :-

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

In vitroclonal propagation in plants is characterized by :-

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

Which vector can clone only a small fragment of DNA?

An example of ex situ conservation is :-

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

Match the following and select the correct option :-

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

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

The organization which publishes the Red List of species is :-

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

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

Planaria possess high capacity of :-

A marine cartilaginous fish that can produce electric current is :-

Choose the correctly matched pair :-

Choose the correctly matched pair :-

In ‘S’ phase of the cell cycle :-

The motile bacteria are able to move by :-

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

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

The enzyme recombinase is required at which stage

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

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

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

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

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

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

Select the correct matching of the type of the joint with the example in human skeletal system

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

Injury localized to the hypothalamus would most likely disrupt

Which one of the following statements is not correct ?

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

Fight-or-flight reactions cause activation of :

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

The main function of mammalian corpus luteum is to produce :

Select the correct option desccribing gonadotropin activity in a normal pregnant female :

Tubectomy is a method of sterilization in which :

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

Assisted reproductive technology, IVF involves transfer of :

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 ?

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 :-

A human female with Tunner’s syndrome :-

Select the correct option :-

Commonly used vectors for human genome sequencing are :-

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 are analogous structures:

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

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

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

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 :-

Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks
(A-D). Identify the blanks :-

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

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

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 ?
\(plant \rightarrow mice \rightarrow snake \rightarrow peacock\) :-

Which of the following is responsible for peat formation ?