Extraction of copper from copper pyrite (CuFeS2) involves

For the following electrochemical cell at 298 K Pt(s) | H2 (g, 1 bar) | H+ (aq, 1 M) || M4+ (aq), M2+ (aq) | Pt (s) Ece

Mixture (s) showing positive deviation from Raoult’s law at 35oC is (are)

The CORRECT statement(s) for cubic close packed (ccp) three dimensional structure is (are) :

Paragraph Thermal decomposition of gaseous X2 to gaseous X at 298 K takes place according to the following equations: X2

Paragraph Thermal decomposition of gaseous X2 to gaseous X at 298 K takes place according to the following equations: X2

According to Molecular Orbital Theory, which of the following statements is(are) correct?

The geometries of the ammonia complexes of Ni2+, Pt2+ and Zn2+, respectively, are

The correct order of acidity for the following compounds is

The major product of the following reaction sequence is:

In the following reaction, sequence in aqueous solution, the species X, Y and Z, respectively, are $${S_2}O_3^{2 - }\bui

The qualitative sketches I, II and III given below show the variation of surface tension with molar concentration of thr

For "invert sugar", the correct statement(s) is(are) (Given : specific rotations of (+)-sucrose, (+)-maltose, L-($$-$$)-

Among the following reaction(s), which gives(give) tert-butyl benzene as the major product is(are)

Reagent(s) which can be used to bring about the following transformation is(are)

The nitrogen containing compound produced in the reaction of HNO3 with P4O10

The compound R is

The compound T is

Let $$a,\,b \in R\,and\,{a^{2\,}} + {b^2} \ne 0$$. Suppose $$S = \left\{ {Z \in C:Z = {1 \over {a + ibt}}, + \in R,t \n

The value of $$\sum\limits_{k = 1}^{13} {{1 \over {\sin \left( {{\pi \over 4} + {{\left( {k - 1} \right)\pi } \over 6}}

Let $$P$$ be the point on the parabola $${y^2} = 4x$$ which is at the shortest distance from the center $$S$$ of the cir

Let $${F_1}\left( {{x_1},0} \right)$$ and $${F_2}\left( {{x_2},0} \right)$$ for $${{x_1} < 0}$$ and $${{x_2} > 0}$

Let $${F_1}\left( {{x_1},0} \right)$$ and $${F_2}\left( {{x_2},0} \right)$$ for $${{x_1} < 0}$$ and $${{x_2} > 0}$

Let f: R $$ \to \left( {0,\infty } \right)$$ and g : R $$ \to $$ R be twice differentiable functions such that f'' and g

The value of $$\int\limits_{-{\pi \over 2}}^{{\pi \over 2}} {{{{x^2}\cos x} \over {1 + {e^x}}}dx} $$ is equal to

Area of the region $$\left\{ {\left( {x,y} \right) \in {R^2}:y \ge \sqrt {\left| {x + 3} \right|} ,5y \le x + 9 \le 15}

Football teams $${T_1}$$ and $${T_2}$$ have to play two games against each other. It is assumed that the outcomes of the

Football teams $${T_1}$$ and $${T_2}$$ have to play two games against each other. It is assumed that the outcomes of the

Let $$P$$ be the image of the point $$(3,1,7)$$ with respect to the plane $$x-y+z=3.$$ Then the equation of the plane pa

Let $$\widehat u = {u_1} \widehat i + {u_2}\widehat j + {u_3}\widehat k$$ be a unit vector in $${{R^3}}$$ and $$\widehat

Let $$f\left( x \right) = \mathop {\lim }\limits_{n \to \infty } {\left( {{{{n^n}\left( {x + n} \right)\left( {x + {n \o

Let $$P = \left[ {\matrix{ 1 & 0 & 0 \cr 4 & 1 & 0 \cr {16} & 4 & 1 \cr } } \right]$$ and I be the iden

Let bi > 1 for I = 1, 2, ......, 101. Suppose logeb1, logeb2, ......., logeb101 are in Arithmetic Progression (A.P.) wit

Let a, b $$\in$$ R and f : R $$\to$$ R be defined by $$f(x) = a\cos (|{x^3} - x|) + b|x|\sin (|{x^3} + x|)$$. Then f is

Let a, $$\lambda$$, m $$\in$$ R. Consider the system of linear equations ax + 2y = $$\lambda$$ 3x $$-$$ 2y = $$\mu$$ Whi

Let $$f:\left[ { - {1 \over 2},2} \right] \to R$$ and $$g:\left[ { - {1 \over 2},2} \right] \to R$$ be function defined

A block with mass M is connected by a massless spring with stiffness constant k to a rigid wall and moves without fricti

The ends Q and R of two thin wires, PQ and RS, are soldered (joined) together. Initially each of the wires has a length

A gas is enclosed in a cylinder with a movable frictionless piston. Its initial thermodynamic state at pressure Pi = 105

Two thin circular discs of mass m and 4m, having radii of a and 2a, respectively, are rigidly fixed by a massless, rigid

There are two Vernier calipers both of which have 1 cm divided into 10 equal divisions on the main scale. The Vernier sc

In an experiment to determine the acceleration due to gravity g, the formula used for the time period of a periodic moti

An accident in a nuclear laboratory resulted in deposition of a certain amount of radioactive material of half-life 18 d

The electrostatic energy of Z protons uniformly distributed throughout a spherical nucleus of radius R is given by $$E =

A small object is placed 50 cm to the left of a thin convex lens of focal length 30 cm. A convex spherical mirror of rad

Consider two identical galvanometers and two identical resistors with resistance R. If the internal resistance of the ga

A rigid wire loop of square shape having side of length L and resistance R is moving along the X-axis with a constant ve

While conducting the Young's double slit experiment, a student replaced the two slits with a large opaque plate in the X

In the circuit shown below, the key is pressed at time t = 0. Which of the following statement(s) is (are) true?

Light of wavelength $$\lambda$$ph falls on a cathode plate inside a vacuum tube as shown in the figure. The work functio

A frame of the reference that is accelerated with respect to an inertial frame of reference is called a non-inertial fra

A frame of the reference that is accelerated with respect to an inertial frame of reference is called a non-inertial fra

Consider an evacuated cylindrical chamber of height h having rigid conducting plates at the ends and an insulating curve

Consider an evacuated cylindrical chamber of height h having rigid conducting plates at the ends and an insulating curve