List of practice Questions

The waves in which the particles of the medium vibrate in a direction perpendicular to the direction of wave motion is known as

The dimensions of angular velocity, is

If the kinetic energy of a body becomes four times of its initial value, then new momentum will

A bullet is fired from a rifle. If the rifle recoils freely, then the kinetic energy of the rifle, is

If the equation for the displacement of a particle moving on a circular path is given by $(\theta)=$ $2 t^{3}+0.5$ where $\theta$ is in radians and $t$ in seconds, then the angular velocity of the particleat $t = 2\, sec$, is

Which of the following compounds will show geometrical isomerism?

According to Fajans rule covalent bond is favoured by:

Which of the following statement (s) is (are) correct ?

Which of the following will undergo aldol condensation?

White phosphorus $(P_4)$ has

There are four machines and it is known that exactly two of them are faulty. They are tested, one by one, in a random order till both the faulty machines are identified. Then, the probability that only two tests are needed, is

If $T_r$ is the $r$th term of an AP, for $r = 1,2,3,.... $ .If for some positive integers m and n, we have $T_m=\frac{1}{n}$ and $T_m=\frac{1}{m}$ then $T_{mn} $ equals

If $P = (x, y),F_1 = (3,0), F_2 = ( 3, 0)$ and $ 16x^2 + 25y^2 = 400,$ then $PF_1 + PF_2$ equals

If $P (1,2), Q (4,6), R (5, 7)$ and $S (a,b)$ are the vertices of a parallelogram $PQRS$, then

If $K_1$ and $K_2$ are the respective equilibrium constants for the two reactions, ${ XeF_6(g)+H_2O(g) <=> XeOF_4(g)+2HF(g)}$ ${ XeO_4(g)+XeF_6(g) <=> XeOF_4(g)+ XeO_3F_2(g)}$ The equilibrium constant of the reaction, ${XeO_4(g)+2HF(g) <=> XeO_3F_2(g)+H_2O(g)}$

Benzyl chloride $(C_6 H_5 CH_2 Cl)$ can be prepared from toluene by chlorination with

Benzene diazonium chloride on reaction with phenol in weakly basic medium gives

A metal beam having coefficient of linear expansion $ \alpha $ Youngs modulus $ Y $ , area of across section a and length L, is clamped at both ends. After cooling by $ t{}^\circ C, $ the force exerted in the clamp is

A vessel contains a mixture of one mole of oxygen and two moles of nitrogen at 300 K. The ratio of the average rotational kinetic energy per O$_2$ molecule to per N$_2$ molecule is

Which of the following statement(s) is/are correct?

Which of the following statement(s) is/are correct when a mixture of NaCI and K$_2Cr_2O_7$ is gently warmed with cone. $H_2SO_4 ? $

A new carbon-carbon bond formation is possible in

Sodium nitrate decomposes above $ \approx; 800^\circ C $ to give

If $x > 1, y > 1, z > 1$ are in GP, then $\frac{1}{1+In\, x}, \frac{1}{1+In\, y},\frac{1}{1+In\, z},$ are in

Number of divisors of the form $(4n + 2), n\ge 0$ of the integer 240 is