A moving body of mass m and velocity 3 km/h collides with a body at rest of mass 2m and sticks to it….

A moving body of mass m and velocity 3 km/h collides with a body at rest of mass 2m and sticks to it. Now the combined mass starts to move. What will be the combined velocity

When work is done on a body by an external force, its….

When work is done on a body by an external force, its

A man pushes a wall and fails to displace it. He does….

A man pushes a wall and fails to displace it. He does

Which of the following is a scalar quantity….

Which of the following is a scalar quantity

If the unit of force and length each be increased by four times, then the unit of energy is increase….

If the unit of force and length each be increased by four times, then the unit of energy is increased by

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The cause of periodicity of properties is?….

The cause of periodicity of properties is?

The elements of groups,1, 2, 13, 14, 15, 16 and 17 are collectively called….

The elements of groups,1, 2, 13, 14, 15, 16 and 17 are collectively called

The electron affinity values for the halogens show the following trend …..

The electron affinity values for the halogens show the following trend .

Element P, Q, R and S belong to the same group. The oxide of P is acidic, oxide of Q and R are ampho….

Element P, Q, R and S belong to the same group. The oxide of P is acidic, oxide of Q and R are amphoteric while the oxide of S is basic. Which of the following elements is the most electropositive ?

Which one of the following is incorrect?….

Which one of the following is incorrect?

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