Recent questions tagged neet

Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine :-

asked Jul 24, 2018 by pady_1

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Which one of the following statements about the zeolites is false :-

asked Jul 24, 2018 by pady_1

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The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V a 25ºC. The equilibrium constant of the reaction would be :- (Given $F = 96500 \;C \;mol^{–1}$; $R = 8.314 JK^{–1} mol^{–1}$)

asked Jul 24, 2018 by pady_1

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Among K, Ca Fe and Zn, the element which can form more than one binary compound with chlorine is :-

asked Jul 24, 2018 by pady_1

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The solubility product of a sparingly soluble salt $AX_2$ is $3.2\times 10^{-11}$. Its solubility (in moles/litre) is:-

asked Jul 24, 2018 by pady_1

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Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are$-382.64KJ mol^{-1}$and $-145.6KJ^{-1} mol^{-1}$, respectively. Standard Gibbs energy change for the same reaction at 298 K is :-

asked Jul 24, 2018 by pady_1

2 answers

Chloropicrin is obtained by the reaction of

asked Jul 24, 2018 by pady_1

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Reaction of HBr with propene in the presence of peroxide gives :-

asked Jul 24, 2018 by pady_1

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The –OH group of an alcohol or the carboxylic acid can be replaced by – Cl, using :-

asked Jul 24, 2018 by pady_1

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Considering $H_2 O$ as a weak field ligand, the number of unpaired electrons in $[MN(H_2O_6)]^{2+}$ will be – (At. no. of Mn = 25)

asked Jul 24, 2018 by pady_1

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$CN^{-}$is a strong field ligand. This is due to the fact that :-

asked Jul 24, 2018 by pady_1

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Ionic radii are :-

asked Jul 24, 2018 by pady_1

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Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is :-

asked Jul 24, 2018 by pady_1

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Which one of the following structures represents the peptide chain :-

asked Jul 24, 2018 by pady_1

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The rate of a first order reaction is $1.5\times 10^{-2} mol L^{-1} min^ {–1}$at 0.5 M concentration of the reactant. The half life of the reaction is :-

asked Jul 24, 2018 by pady_1

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Among the following, the pair in which the two species are not isostructural is :-

asked Jul 24, 2018 by pady_1

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Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere :-

asked Jul 24, 2018 by pady_1

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If the bond energies of H–H, Br – Br and H –Br are 433, 192 and $-364\; kJ\; mol ^{–1}$ respectively the $\Delta H^o$ for the reaction $H_2(g)+Br_2(g)\to 2HBr(g)$ is-

asked Jul 24, 2018 by pady_1

2 answers

Which of the following is considered to be an anticancer species :-

asked Jul 24, 2018 by pady_1

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The hormone that helps in the conversion of glucose to glycogen is :-

asked Jul 24, 2018 by pady_1

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A galvanometer of 50 ohm resistance has 25 divisions. A current of $4\times 10^{-4}$ ampere gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volts, it should be connected with a resistance of

asked Jul 24, 2018 by pady_1

1 answer

Five equal resistances each of resistance R are connected as shown in the Figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be

asked Jul 24, 2018 by pady_1

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A battery is charged at a potential of 15V for 8 hours when the current flowing is 10A. The battery on discharge supplies a current of 5A for 15 hours. The mean terminal voltage during discharges is 14 V. The "Watt hour" efficiency of the battery is :-

asked Jul 24, 2018 by pady_1

2 answers

One mole of an ideal gas at an initial temperature of T K does 6 R joules of work adiabatically. If the ratio of specific heats of this gas at consta pressure and at constant volume is $\frac {5} {3}$, the final temperature of gas will be :-

asked Jul 24, 2018 by pady_1

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A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is :-

asked Jul 24, 2018 by pady_1

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An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipol moment is along the direction of the field, the force on it and its potential energy are respectively :-

asked Jul 24, 2018 by pady_1

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Consider a system of two particles having masses $m_1$ and $m_2$ . If the particle of mass $m_1$ is pushed towards the mass centre of particles through a distance 'd', by what distance would the particle of mass $m_2$ move so as to keep the mass centre of particles at the original position

asked Jul 24, 2018 by pady_1

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A wheel having moment of inertia $2 kg–m ^{2}$ about its vertical axis, rotates at the rate of 60 rpm about the axis. The torque which can stop the wheel's rotation in one minute would be :-

asked Jul 24, 2018 by pady_1

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Energy E of a hydrogen atom with principal quantum number n is given by $E=\frac{-13.6} {n^{6}}eV$. n The energy of a photon ejected when the electron jumps from n = 3 state to n = 2 state of hydrogen is approximately :-

asked Jul 24, 2018 by pady_1

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Three particles, each of mass m gram, are situated at the vertices of an equilateral triangle ABC of side l cm. (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram$\; cm ^2$ units will be :-

asked Jul 24, 2018 by pady_1

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A block of mass m is placed on a smooth wedge of inclination $\theta$. The whole system is accelerated horizontally so that the block does not slip on th wedge. The force exerted by the wedge on the block (g is acceleration due to gravity) will be :-

asked Jul 24, 2018 by pady_1

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The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of the same radius abou a tangential axis in the plane of the ring is:-

asked Jul 24, 2018 by pady_1

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If $\lambda_{m}$ denotes the wavelength at which the radioactive emission from a black body at a temperature T K is maximum, then :-

asked Jul 24, 2018 by pady_1

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The equation of state for 5g of oxygen at a pressure P and temperature T, when occupying a volume V, will be :- Where is the gas constant.

asked Jul 24, 2018 by pady_1

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A bullet of mass 2 g is having a charge of 2 µC. Through what potential difference must it be accelerated, starting from rest, to acquire a speed of 10 m/s ?

asked Jul 24, 2018 by pady_1

1 answer

The magnetic flux through a circuit of resistance R changes by an amount $\Delta \phi$ in a time $\Delta t$. Then the total quantity of electric charges Q that passes any point in the circuit during the time $\Delta t$ is represented by :-

asked Jul 24, 2018 by pady_1

2 answers

In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance of a 60W bulb for use in India is R, The resistance of a 60W bulb for use in USA will be :-

asked Jul 24, 2018 by pady_1

1 answer

The dimensions of universal gravitational constant are :-

asked Jul 24, 2018 by pady_1

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A stone is tied to a string of length 'l' and is whirled in a vertical circle with the other end of the string as the centre. At a certain instant of time, the stone is at its lowest position and has a speed 'u'. The magnitude of the change in velocity as it reaches a position where the string is horizontal (g being acceleration due to gravity) is :-

asked Jul 24, 2018 by pady_1

1 answer

The refractive index of the material of a prism is $\sqrt 2$and its refracting angle is 30º. One of the refracting surfaces of the prism is made a mirror inwards. A beam of monochromatic light entering the prism from the other face will retrace its path after reflection form the mirrored surface if its angle of incidence on the prism is

asked Jul 24, 2018 by pady_1

1 answer

A particle of mass $m_1$ is moving with a velocity $v_1$ and another particle of mass $m_2$ is moving with a velocity $v_2$. Both of them have the same momentum but their different kinetic energies are $E_1$ and $E_2$ respectively. If $m_1$ > $m_2$ then :

asked Jul 24, 2018 by pady_1

1 answer

A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from :-

asked Jul 24, 2018 by pady_1

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A galvanometer acting as a voltmeter will have :-

asked Jul 24, 2018 by pady_1

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The unit of permittivity of free space $\epsilon_0$ is :-

asked Jul 24, 2018 by pady_1

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Resistances n, each of r ohm, when connected in parallel give an equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohms, equal to

asked Jul 24, 2018 by pady_1

2 answers

The electric resistance of a certain wire of iron i R. If its length and radius are both doubled, then:-

asked Jul 24, 2018 by pady_1

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When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be :-

asked Jul 24, 2018 by pady_1

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The term "antibiotic" was coined by : -

asked Jul 24, 2018 by pady_1

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The aleurone layer in maize grain is specially rich in :-

asked Jul 24, 2018 by pady_1

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Genetic Map is one that : -

asked Jul 24, 2018 by pady_1

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