List of practice Questions

Cryoscopic constant is the depression in the freezing point produced by
Which one of the following forms oleum when dissolved in cone $ {H_2SO_4}$ ?
The EMF of a cell containing sodium/copper electrodes is 3.05 V. If the electrode potential of copper electrode is + 0.34 V the electrode potential of sodium is
The range of a particle projected at an angle of 15? with the horizontal is 1.5 km. Its range when projected with the same velocity at an angle of 45? with the horizontal is
A body when released from the top of a tower of height $h$ reaches the ground in time 1 second. Time in second at which it is a height $ \frac{h}{2}$ above the groun.d is
Woollen clothes keep the body warm because they
$\displaystyle\lim_{n\to\infty} \frac{1^{2}+2^{2} +...+n^{2}}{4n^{3}+6n^{2}-5n+1}=$
If $C$ is the centre of the ellipse $\frac{x^{2}}{16} + \frac{y^{2}}{9} = 1 $ and S is one of the foci, then the ratio of CS to semi-minor axis of the ellipse is
If $\log (x + z) + \log (x - 2y + z) = 2 \log (x - z),$ then $ x, y, z$ are in
Iodine value is used to determine
A charge situated at a certain distance along the axis of an electric dipole experience a force $F$. If the distance of the charge from the dipole is doubled, the force acting on it will become
The modulus and amplitude of $\frac{ 1 + 2i}{1 - (1 - i)^2}$ are respectively
$+I$ effectis exhibited by
The derivative of $\sin x^{\circ} \, \, \cos x$ with respect to $x$ is
A DC source of $30 \, V$ is connected across two resistors of $200\, \Omega$ each connected in series. A voltmeter of resistance $200 \, \Omega$ is connected across a resistor. It reads
Cuprammonium ion is having
The adsorption of inert gases on the surface of activated charcoal increases with
The angles $A, B$ and $C$ of a triangle $ABC$ are in A.P. If $b : c =\sqrt {3} : \sqrt {2}$ then the angle $A$ is
If $n$ is a non-negative integer and $A = \begin{bmatrix}1&0\\ 1&1\end{bmatrix} $ , then $A^n = $
The object at rest suddenly explodes into three parts with the mass ratio 2:1:1. The parts of equal masses move at right angles to each other with equal speeds. The speed of the third part after the explosion will be
'Raman frequencies' refers to
The angle between particle velocity and wave velocity in a transverse wave is
A $ 20\,mu F $ capacitor is connected to $ 45\,V $ battery through a circuit whose resistance is $ 2000\, \Omega $ . What is the final charge on the capacitor ?
A particle having almost zero mass and exactly zero charge is
A long spring is stretched by $ 2\,cm $ and its potential energy is $ U $ . If the spring is stretched by $ 10\,cm $ ; its potential energy will be