List of practice Questions

In which of the following groups, when He is placed, its all the properties are satisfied ?

Which of the following is paramagnetic ?

In Cycas, open vascular bundle is characterised by

In an upright pyramid of biomass, the herbivores occupy the position

If the pressure amplitude in a sound wave is tripled, then the intensity of sound is increased by a factor of:

Half life of a substance is $20$ minutes. What is the time between $33\%$ decay and $67\%$ decay?

Guttation is due to

Gene which suppresses other gene?? activity but does not lie on the same locus is called as

Gasoline is a mixture of hydrocarbons containing

Eddy currents are produced when

Cotton fibres obtained from

Reason for weightlessness in satellite:

If solid sphere and solid cylinder of same mass and density rotate about their own axis, the moment of inertia will be greater for:

A satellite of mass $ m_{s} $ is moving in an orbit of radius $R$, then its angular momentum:

True relation for triode valve is:

The ratio of escape velocity and orbital velocity of satellite revolving near the earth:

When a load of $5 \,kg$ is hung on a wire then extension of $3$ metre takes place, then work done will be:

The relation between time period $(T)$ of a body and radius of circular orbit $(r)$ is:

A steel wire of $1\, m$ long and $1\, mm^2$ cross section area is hanged from rigid end when weight of $1 \,kg$ is hung from it then change in length will be (for wire Youngs coefficient $ Y=2\times 10^{11}\,N/m^{2} $ ):

Contact angle of kerosen oil with solid surface is:

Baking soda or baking powder is

If a convex lens is kept in water its convergent power decreases. Focal length of convex lens in water increases.

$H _{3} PO _{3}$ is dibasic acid. Two hydrogen atoms are directly attached to the P.

Danger signals are made of red colour. Velocity of red light is maximum and thus more visibility in dark.

Amphibians have evolved from fishes. Take the example of the fossil Archaeopteryx.