Which one of the following pairs of isomers is an example of metamerism?

In the above reactions, product A and product B respectively are :

The major product (P) in the following reaction is :

A solution is 0.1 M in Cl$$-$$ and 0.001 M in CrO$$_4^{2 - }$$. Solid AgNO3 is gradually added to it. Assuming that the

Outermost electronic configuration of a group 13 element, E, is 4s2, 4p1. The electronic configuration of an element of

Metallic sodium does not react normally with :

Spin only magnetic moment of an octahedral complex of Fe2+ in the presence of a strong field ligand in BM is :

Which one of the following species doesn't have a magnetic moment of 1.73 BM, (spin only value)?

Which one of the following statements is not true about enzymes?

The hybridisations of the atomic orbitals of nitrogen in NO$$_2^ - $$, NO$$_2^ + $$ and NH$$_4^ + $$ respectively are.

Benzene on nitration gives nitrobenzene in presence of HNO3 and H2SO4 mixture, where :

Consider the above reaction, compound B is :

Major product P of above reaction, is :

Cu2+ salt reacts with potassium iodide to give

In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of :

The correct order of their reactivity towards hydrolysis at room temperature is :

For a given chemical reaction A $$\to$$ B at 300 K the free energy change is $$-$$49.4 kJ mol$$-$$1 and the enthalpy of

The wavelength of electrons accelerated from rest through a potential difference of 40 kV is x $$\times$$ 10$$-$$12 m. T

The vapour pressures of A and B at 25$$^\circ$$C are 90 mm Hg and 15 mm Hg respectively. If A and B are mixed such that

4g equimolar mixture of NaOH and Na2CO3 contains x g of NaOH and y g of Na2CO3. The value of x is ____________ g. (Neare

When 0.15 g of an organic compound was analyzed using Carius method for estimation of bromine, 0.2397 g of AgBr was obta

$$PC{l_5}(g) \to PC{l_3}(g) + C{l_2}(g)$$In the above first order reaction the concentration of PCl5 reduces from initia

An aqueous solution of NiCl2 was heated with excess sodium cyanide in presence of strong oxidizing agent to form [Ni(CN)

Potassium chlorate is prepared by electrolysis of KCl in basic solution as shown by following equation.6OH$$-$$ + Cl$$-$

The value of $$\tan \left( {2{{\tan }^{ - 1}}\left( {{3 \over 5}} \right) + {{\sin }^{ - 1}}\left( {{5 \over {13}}} \rig

The lines x = ay $$-$$ 1 = z $$-$$ 2 and x = 3y $$-$$ 2 = bz $$-$$ 2, (ab $$\ne$$ 0) are coplanar, if :

If [x] denotes the greatest integer less than or equal to x, then the value of the integral $$\int_{ - \pi /2}^{\pi /2}

If the real part of the complex number $${(1 - \cos \theta + 2i\sin \theta )^{ - 1}}$$ is $${1 \over 5}$$ for $$\theta

Let $$f:R - \left\{ {{\alpha \over 6}} \right\} \to R$$ be defined by $$f(x) = {{5x + 3} \over {6x - \alpha }}$$. Then

If $$f:R \to R$$ is given by $$f(x) = x + 1$$, then the value of $$\mathop {\lim }\limits_{n \to \infty } {1 \over n}\le

Let A, B and C be three events such that the probability that exactly one of A and B occurs is (1 $$-$$ k), the probabil

The sum of all the local minimum values of the twice differentiable function f : R $$\to$$ R defined by $$f(x) = {x^3} -

Let y = y(x) satisfies the equation $${{dy} \over {dx}} - |A| = 0$$, for all x > 0, where $$A = \left[ {\matrix{ y

If the mean and variance of six observations 7, 10, 11, 15, a, b are 10 and $${{20} \over 3}$$, respectively, then the v

Let $$g(t) = \int_{ - \pi /2}^{\pi /2} {\cos \left( {{\pi \over 4}t + f(x)} \right)} dx$$, where $$f(x) = {\log _e}\lef

Let P be a variable point on the parabola $$y = 4{x^2} + 1$$. Then, the locus of the mid-point of the point P and the fo

The value of k $$\in$$R, for which the following system of linear equations3x $$-$$ y + 4z = 3,x + 2y $$-$$ 3z = $$-$$26

In a triangle ABC, if $$\left| {\overrightarrow {BC} } \right| = 3$$, $$\left| {\overrightarrow {CA} } \right| = 5$$ and

The number of solutions of the equation $${\log _{(x + 1)}}(2{x^2} + 7x + 5) + {\log _{(2x + 5)}}{(x + 1)^2} - 4 = 0$$,

Let a curve y = y(x) be given by the solution of the differential equation $$\cos \left( {{1 \over 2}{{\cos }^{ - 1}}({e

For p > 0, a vector $${\overrightarrow v _2} = 2\widehat i + (p + 1)\widehat j$$ is obtained by rotating the vector $

Consider a triangle having vertices A($$-$$2, 3), B(1, 9) and C(3, 8). If a line L passing through the circum-centre of

If the point on the curve y2 = 6x, nearest to the point $$\left( {3,{3 \over 2}} \right)$$ is ($$\alpha$$, $$\beta$$), t

Let a function g : [ 0, 4 ] $$\to$$ R be defined as $$g(x) = \left\{ {\matrix{ {\mathop {\max }\limits_{0 \le t \le x

If $$\mathop {\lim }\limits_{x \to 0} {{\alpha x{e^x} - \beta {{\log }_e}(1 + x) + \gamma {x^2}{e^{ - x}}} \over {x{{\si

If the Kinetic energy of a moving body becomes four times its initial Kinetic energy, then the percentage change in its

A boy reaches the airport and finds that the escalator is not working. He walks up the stationary escalator in time t1.

A satellite is launched into a circular orbit of radius R around earth, while a second satellite is launched into a circ

With what speed should a galaxy move outward with respect to earth so that the sodium-D line at wavelength 5890 $$\matho

The length of a metal wire is l1, when the tension in it is T1 and is l2 when the tension is T2. The natural length of t

In an electromagnetic wave the electric field vector and magnetic field vector are given as $$\overrightarrow E = {E_0}

For a series LCR circuit with R = 100 $$\Omega$$, L = 0.5 mH and C = 0.1 pF connected across 220V$$-$$50 Hz AC supply, t

Which of the following graphs represent the behavior of an ideal gas? Symbols have their usual meaning.

A particle is making simple harmonic motion along the X-axis. If at a distances x1 and x2 from the mean position the vel

An electron having de-Broglie wavelength $$\lambda$$ is incident on a target in a X-ray tube. Cut-off wavelength of emit

A body rolls down an inclined plane without slipping. The kinetic energy of rotation is 50% of its translational kinetic

If time (t), velocity (v), and angular momentum (l) are taken as the fundamental units. Then the dimension of mass (m) i

The correct relation between the degrees of freedom f and the ratio of specific heat $$\gamma$$ is :

Consider a binary star system of star A and star B with masses mA and mB revolving in a circular orbit of radii rA an rB

A body at rest is moved along a horizontal straight line by a machine delivering a constant power. The distance moved by

Two vectors $${\overrightarrow P }$$ and $${\overrightarrow Q }$$ have equal magnitudes. If the magnitude of $${\overrig

Two small drops of mercury each of radius R coalesce to form a single large drop. The ratio of total surface energy befo

The magnetic susceptibility of a material of a rod is 499. Permeability in vacuum is 4$$\pi$$ $$\times$$ 10$$-$$7 H/m. A

A zener diode having zener voltage 8 V and power dissipation rating of 0.5 W is connected across a potential divider arr

A body of mass 'm' is launched up on a rough inclined plane making an angle of 30$$^\circ$$ with the horizontal. The coe

In the given figure switches S1 and S2 are in open condition. The resistance across ab when the switches S1 and S2 are c

Two bodies, a ring and a solid cylinder of same material are rolling down without slipping an inclined plane. The radii

For the forward biased diode characteristics shown in the figure, the dynamic resistance at ID = 3 mA will be __________

A series LCR circuit of R = 5$$\Omega$$, L = 20 mH and C = 0.5 $$\mu$$F is connected across an AC supply of 250 V, havin

One mole of an ideal gas at 27$$^\circ$$ is taken from A to B as shown in the given PV indicator diagram. The work done

A certain metallic surface is illuminated by monochromatic radiation of wavelength $$\lambda$$. The stopping potential f

A body rotating with an angular speed of 600 rpm is uniformly accelerated to 1800 rpm in 10 sec. The number of rotations