List of practice Questions

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
If $\omega$ is an imaginary cube root of unity, then (1 + $\omega$ - $\omega^2)^7$ is equal to
A fair coin is tossed repeatedly. If tail appears on first four tosses, then the probability of head appearing on fifth toss equals
A black body is at a temperature of 2880 K. The energy of radiation emitted by this body with wavelength between 499 nm and 500 nm is$U_1$, between 999 nm and 1000 nm is $U_2$ and between 1499 nm and 1500 nm is $U_3$. The Wien constant, b = 2.88 $\times 10^6$ nm-K. Then,
A string of length 0.4 m and mass $10^{-2} kg$ is tightly clamped at its ends. The tensior in the string is 1.6 N. Identical wave pulses are produced at one end at equal intervals of time $\Delta t.$ The minimum value of $\Delta t.$ which allows constructive interference between successive pulses, is
The torque $\tau$ on a body about a given point is found to be equal to A x L, where A is a constant vector and L is the angular momentum of the body about that point. From this it follows that
Whip tail disease is caused by the deficiency of:
The reaction of HCN with aldehydes, is an example of:
The number of Barr bodies in a human suffering from Turners syndrome, is:
The linear momentum p of a body varies with time and it is given by equation $ p=x+y{{t}^{2}} $ where $ x $ and $ y $ are constants. The net force acting on the body for a one dimensional motion is :
In which of the following reactions, the heat of neutralization will be the highest?
In a p-n-p transistor working as common base amplifier, current gain is 0.96 and emitter current is 7.2 mA. Then base current will be:
Even after killing the generative cell with a laser beam, the pollen grain of tobacco germinates and issues a normal pollen tube, because:
Aristotles Lantern is the masticatory apparatus of:
The number of degrees of freedom for each atom of a monatomic gas is
The magnifying power of a simple microscope M is given by
A stone of mass 1 kg tied to the end of a string of length 1 m, is whirled in a horizontal circle, with a uniform angular velocity 2 radian/sec. The tension of the string is (N)
A light body A and a heavy body B have equal linear momentum. Then the K.E. of the body A
Which one of the following is a protein deficiency disease?