1. What do you understand by free vibrations of a body?
2. Why does the amplitude of a vibrating body continuously decrease during damped vibrations?

When a current carrying conductor is placed in a magnetic field, it experiences a mechanical force. What should be the angle between the magnetic field and the length of the conductor so that the...

Why was the League of Nations established

The diagram shown below is the longitudinal section of a testis of man. Study it carefully and answer the questions that follow: 

1.  Label the parts numbered 1 to 3 in the diagram. 
2. In which part of the
...

The process by which root hairs absorb water from the soil.

The Council of Ministers headed by the Prime Minister, is the most Powerful Institution in the Indian Polity. In this context, answer the following: Distinguish between the Council of Ministers and...

Acid rain is harmful to the environment.

Lenticels or stomata (Which one remains open always?)

State one observation: Ammonia gas is passed over heated copper (II) oxide

Mention one forest conservation method followed in India.

Name the following elements:

1. An alkaline earth metal present in group 2 and period 3.
2. A trivalent metal used to make light tools.
3. A monovalent non-metal present in fluorspar.

Give two ways in which rail transport is useful for the people of India.

The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the questions:

1. Name the phenomenon that is depicted in the diagram. Define the
...

Burning of ammonia in air.

Give the structural formulae of each of the following

1. 2-methyl propane
2. Ethanoic acid
3. Butan – 2 – ol

Name the radiations which are absorbed by greenhouse gases in the earth’s atmosphere.