(i) Why is a nuclear fusion reaction called a thermo nuclear reaction?

(ii) Complete the reaction:

³He₂ + ²H₁ → ⁴He₂ + .... + Energy

An object is placed at a distance of 12 cm from a convex lens of focal length 8 cm. Find:

1. the position of the image
2. nature of the image

(i) With reference to the direction of action, how does a centripetal force differ from a centrifugal force during uniform circular motion?

(ii) Is centrifugal force the force of reaction of...

Complete the path of the monochromatic light ray AB incident on the surface PQ of the equilateral glass prism PQR till it emerges out of the prism due to refraction.

The diagram below shows the core of a transformer and its input and output connections:

1. State the material used for the core.
2. Copy and complete the diagram of the transformer by drawing input and
...

For the electro-refining of copper:

1. What is the cathode made up of?
2. Write the reaction that takes place at the anode.

Copy and complete the following table which refers to the industrial method for the preparation of ammonia and sulphuric acid:

Name the following: A metallic mineral for which the Balaghat district of Madhya Pradesh is famous.

State any one reason why the President is elected indirectly.

A man standing in front of a vertical cliff fires a gun. He hears the echo after 3.5 seconds. On moving closer to the cliff by 84 m, he hears the echo after 3 seconds. Calculate the distance of the...

Find the empirical formula and the molecular formula of an organic compound from the data given below:

C = 75.92%, H = 6.32% and N = 17.76%

The vapour density of the compound is 39.5. [C = 12, H =...

State one other qualification required to become a Judge of the High Court, apart from Indian citizenship.

Give one example of each when:

1. Chemical energy changes into electrical energy.
2. Electrical energy changes into sound energy.

The necessity to maintain International peace led to the establishment of the United Nations Organisation. With reference to the statement, answer the following: State the Composition of the...

With reference to black soil, Give one chemical property of this soil.

State one relevant observation: A piece of sodium metal is put into ethanol at room temperature.