List of practice Questions

Stomata remain open during day. Stomata help in exchange of gases.
Cocaine is a stimulant, which may cause addiction. It is an alkaloid obtained from
Among the land animals, the Cheetah can run fastest over the ground. The Cheetah uses its powerful forelimbs to push itself forward during running.
Wooden doors swell up and get stuck during the rainy season. This is due to the phenomenon of
Which of these are considered most essential in the origin of life?
Some students, during a study, caught, marked and released 80 fishes in a pond. Later 100 fishes were caught at random. Among these 40 were found to be marked. What is the approximate number of fishes in the pond?
A human RBC is placed in 1.5% salt solution. It will
A body of mass $M$ moving with velocity $V$ explodes into two equal parts. If one comes to rest and the other body moves with velocity $v$, what would be the value of $v$ ?
Temperature and pressure of $2\, g$ oxygen are $27^{\circ} C$ and $76\, cm\, Hg$, then volume of the gas is:
In which condition a real gas behaves as an ideal gas?
At a place earth's magnetic field $5 \times 10^{5} Wb / m ^{2}$ is acting perpendicular to a coil of radius $R=5 \,cm$. If $\mu_{0} / 4 \pi=10^{-7}$, then how much current is induced in circular loop?
Colour of a star depends upon
For liquid to rise in a capillary tube, the angle of contact should be
The orbital velocity of an artificial satellite in a circular orbit just above the earth's surface is $v$. The orbital velocity of a satellite orbiting at an altitude of half of the radius, is
A particle is revolving in a circle of radius $R$. If the force acting on it is inversely proportional to $R$, then the time period is proportional to
$1 \,Kcal$ of heat flowing through a rod of iron. When the rod is cut down to $4$ pieces then what will be the heat flowing through each piece having same differential temperature?
Speed in kilometer per hour in S.I. unit is represented as
S.I. unit of velocity is
If the potential energy of a body on a planet is numerically $U$ and the escape velocity for the same body be $v_{e}$ for the same planet then $U / v_{e}$ will be :
A car of mass $ m $ moves in a horizontal circular path of radius $ r $ meter. At an instant its speed is $ v\,m/s $ and is increasing at a rate a $ m/s^{2} $ , then the acceleration of the car is:
An object of mass $40\, kg$ and having a velocity $4\, m/s$ collides with another object $ \left( m=60\,kg \right) $ having velocity $2\, m/s$. The collision is perfectly inelastic. The loss in energy is:
An iron rod of length $2 \,m $ and area of cross-section $ 50\,mm^{2}$ stretches by $ 0.5\,mm $ , when a mass of $250\, kg$ is hung from its lower end. The Young's of iron rod is:
A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $ 1\,m/s $ , so as the have same kinetic energy as that of the boy. The original speed of the man is:
An earth satellites $ S $ has an orbit radius which is $4$ times that of communication satellite $C$. The period of revolution of $ S $ will be:
$ n $ small balls, each of mass $ m $ impinge elastically each second on a surface with a velocity $ u $ , then the force experienced by the surface in one second, will be: