The major product of the following reaction is :

The IUPAC name of the following compound is :

The major product of the following reaction is :

The major product expected from the following reaction is :

Which of the following compounds will not undergo Friedel Craft’s reaction with benzene ?

A solution containing a group-IV cation gives a precipitate on passing H2S. A solution of this precipitate in dil.HCl pr

Among the following, the essential amino acid is :

Which of the following statements is not true about partition chromatography?

A mixture containing the following four compounds is extracted with $$1M$$ $$HCl.$$ The compound that goes to aqueous la

A metal ‘M’ reacts with nitrogen gas to afford ‘M3N’. ‘M3N’ on heating at high temperature gives back ‘M’ and on reactio

Consider the following standard electrode potentials (Eo in volts) in aqueous solution : .tg {border-collapse:collapse

The major product of the following reaction is :

Consider the following ionization enthalpies of two elements 'A' and 'B' . .tg {border-collapse:collapse;border-spacin

If the shortest wavelength in Lyman series of hydrogen atom is A, then the longestwavelength in Paschen series of He+ is

sp3d2 hybridization is not displayed by :

The pair of compounds having metals in their highest oxidation state is :

Which of the following is paramagnetic ?

The enthalpy change on freezing of 1 mol of water at 5oC to ice at −5oC is : (Given $$\Delta $$fusH = 6 kJ mol$$-$$1 at

The rate of a reaction A doubles on increasing the temperature from 300 to 310 K. By how much, the temperature of reacti

Additin of sodium hydroxide solution to a weak acid (HA)results in a buffer of pH 6. If ionition constant of HA is 10$$-

5 g of Na2SO4 was dissolved in x g of H2O. The change in freezing point was found to be 3.82oC. If Na2SO4 is 81.5% io

What is the standard reduction potential (Eo) for Fe3+ $$ \to $$ Fe ? Given that : Fe2+ + 2e$$-$$ $$ \to $$ Fe; $$E_{F{

For a reaction, A(g) $$ \to $$ A($$\ell $$); $$\Delta $$H= $$-$$ 3RT. The correct statement for the reaction is :

Excess of NaOH (aq) was added to 100 mL of FeCl3 (aq) resulting into 2.14 g of Fe(OH)3 . The molarity of FeCl3 (aq) is

The number of real values of $$\lambda $$ for which the system of linear equations 2x + 4y $$-$$ $$\lambda $$z = 0 4x +

If (27)999 is divided by 7, then the remainder is :

Let A be any 3 $$ \times $$ 3 invertible matrix. Then which one of the following is not always true ?

Let p(x) be a quadratic polynomial such that p(0)=1. If p(x) leaves remainder 4 when divided by x$$-$$ 1 and it leaves r

If the arithmetic mean of two numbers a and b, a > b > 0, is five times their geometric mean, then $${{a + b} \ov

If all the words, with or without meaning, are written using the letters of the word QUEEN and are arranged as in Englis

Let f(x) = 210.x + 1 and g(x)=310.x $$-$$ 1. If (fog) (x) = x, then x is equal to :

Let z$$ \in $$C, the set of complex numbers. Then the equation, 2|z + 3i| $$-$$ |z $$-$$ i| = 0 represents :

Consider an ellipse, whose center is at the origin and its major axis is along the x-axis. If its eccentricity is $${3 \

The value of tan-1 $$\left[ {{{\sqrt {1 + {x^2}} + \sqrt {1 - {x^2}} } \over {\sqrt {1 + {x^2}} - \sqrt {1 - {x^2}} }

If $$S = \left\{ {x \in \left[ {0,2\pi } \right]:\left| {\matrix{ 0 & {\cos x} & { - \sin x} \cr {\sin

An unbiased coin is tossed eight times. The probability of obtaining at least one head and at least one tail is :

Three persons P, Q and R independently try to hit a target. I the probabilities of their hitting the target are $${3 \ov

The mean age of 25 teachers in a school is 40 years. A teacher retires at the age of 60 years and a new teacher is appo

The area (in sq. units) of the parallelogram whose diagonals are along the vectors $$8\widehat i - 6\widehat j$$ and $$3

If two parallel chords of a circle, having diameter 4units, lie on the opposite sides of the center and subtend angles $

The integral $$\int_{{\pi \over {12}}}^{{\pi \over 4}} {\,\,{{8\cos 2x} \over {{{\left( {\tan x + \cot x} \right)}^3}}

The area (in sq. units) of the smaller portion enclosed between the curves, x2 + y2 = 4 and y2 = 3x, is :

The locus of the point of intersection of the straight lines, tx $$-$$ 2y $$-$$ 3t = 0 x $$-$$ 2ty + 3 = 0 (t $$ \in $

The curve satisfying the differential equation, ydx $$-$$(x + 3y2)dy = 0 and passing through the point (1, 1), also pas

If y = $${\left[ {x + \sqrt {{x^2} - 1} } \right]^{15}} + {\left[ {x - \sqrt {{x^2} - 1} } \right]^{15}},$$ then (x2 $$

If a point P has co-ordinates (0, $$-$$2) and Q is any point on the circle, x2 + y2 $$-$$ 5x $$-$$ y + 5 = 0, then the

The integral $$\int {\sqrt {1 + 2\cot x(\cos ecx + \cot x)\,} \,\,dx} $$ $$\left( {0 < x < {\pi \over 2}} \right

$$\mathop {\lim }\limits_{x \to 3} $$ $${{\sqrt {3x} - 3} \over {\sqrt {2x - 4} - \sqrt 2 }}$$ is equal to :

There is a uniform electrostatic field in a region. The potential at various points on a small sphere centred at $$P,$$

Let the refractive index of a denser medium with respect to a rarer medium be n12 and its critical angle be θC . At an a

A single slit of width b is illuminated by a coherent monochromatic light of wavelength $$\lambda $$. If the second and

Magnetic field in a plane electromagnetic wave is given by $$\overrightarrow B $$ = B0 sin (k x + $$\omega $$t) $$\wideh

What is the conductivity of a semiconductor sale having electron concentration of $$5 \times {10^{18}}\,\,{m^{ - 3}},$$

A small circular loop of wire of radius a is located at the centre of a much larger circular wire loop of radius b. The

A uniform disc of radius R and mass M is free to rotate only about its axis. A string is wrapped over its rim and a body

In a physical balance working on the principle of moments, when 5 mg weight is placed on the left pan, the beam becomes

A magnetic dipole in a constant magnetic field has :

In a certain region static electric and magnetic fields exist. The magnetic field is given by $$\overrightarrow B = {B_

The energy stored in the electric field produced by a metal sphere is 4.5 J. If the sphere contains 4 $$\mu $$C charge,

The maximum velocity of the photoelectrons emitted from the surface is v when light of frequency n falls on a metal surf

Two wires W1 and W2 have the same radius r and respective densities $$\rho $$1 and $$\rho $$2 such that ρ2 = 4$$\rho

The ratio of maximum acceleration to maximum velocity in a simple harmonic motion is 10 s−1 . At, t = 0 the displacement

An ideal gas has molecules with 5 degrees of freedom. The ratio of specific heats at constant pressure (Cp ) and at cons

A compressive force, F is applied at the two ends of a long thin steel rod. It is heated, simultaneously, such that its

Moment of inertia of an equilateral triangular lamina ABC, about the axis passing through its centre O and perpendicular

In an experiment, a sphere of aluminium of mass 0.20 kg is heated upto 150oC. Immediately, it is put into water of volum

An object is dropped from a height h from the ground. Every time it hits the ground it looses 50% of its kinetic energy.

A 1 kg block attached to a spring vibrates with a frequency of 1 Hz on a frictionless horizontal table. Two springs iden

Which graph corresponds to an object moving with a constant negative acceleration and a positive velocity ?

Time (T), velocity (C) and angular momentum (h) are chosen as fundamentalquantities instead of mass, length and time. In

A 9 V battery with internal resistance of 0.5 $$\Omega $$ is connected across an infinite network as shown in the figu

If the Earth has no rotational motion, the weight of a person on the equator is W. Determine the speed with which the ea

The V-I characteristic of a diode is shown in the figure. The ratio of forward to reverse bias resistance is :

Two deuterons undergo nuclear fusion to form a Helium nucleus. Energy released in this process is : (given binding energ

According to Bohr’s theory, the time averaged magnetic field at the centre (i.e. nucleus) of a hydrogen atom due to the