Name the gas evolved in each of the following cases:

1. Alumina undergoes electrolytic reduction.
2. Ethene undergoes hydrogenation reaction.
3. Ammonia reacts with heated copper oxide.

The following figure represents a solid consisting of a right circular cylinder with a hemisphere at one end and a cone at the other. Their common radius is 7 cm. The height of the cylinder and cone...

Name the following: The location of an iron and steel industry set up with German collaboration.

The diagram given below is that of a structure present in a human kidney.
Study the same and answer the questions that follow:

1. Name the structure represented in the diagram.
2. What is the liquid
...

A ray of light travels from water to air as shown in the diagram given below:

1. Copy the diagram and complete the path of the ray. Given the critical angle for water is 48°.
2. State the condition so
...

Write one condition where it does not bend when entering a medium of different optical density.

"The modern means of irrigation are gaining popularity." Give two reasons to justify this statement.

Rekha opened a recurring deposit account for 20 months. The rate of interest is 9% per annum and Rekha receives ₹441 as interest at the time of maturity. Find the amount Rekha deposited each month.

Name an area in India in which each of the following processes take place: Gully erosion

Answer the following questions based on a hot cathode ray tube.

1. Name the charged particles.
2. State the approximate voltage used to heat the filament.
3. What will happen to the beam when it passes
...

Baeyer's process is used to concentrate bauxite ore to alumina.

Give balanced chemical equations for the reaction taking place for its conversion from bauxite to alumina.

The mean of the following data is 16. Calculate the value of f

The difference between the birth rate and the death rate.

Give appropriate biological or technical terms for the following:

State the agricultural benefits derived from: The Kalbaisakhi in Assam.

The period between 1920 to 1947 was marked with major events and reforms that finally led us to our Independence. In this context, How did the Congress and the Muslim League respond to the Cabinet...

(i) Define couple

(ii) State the S.I. unit of moment of couple.