English Medium इयत्ता १० - CBSE Question Bank Solutions

Explain the term “corrosion” with an example. Write a chemical equation to show the process of corrosion of iron.

What special name is given to the corrosion of iron?

What type of chemical reaction is involved in the corrosion of iron?

Name any three objects (or structures) which are gradually damaged by the corrosion of iron and steel.

The chemical reaction involved in the corrosion of iron metal is that of ______.

1. A ray of white light breaks up into its components while passing through a glass prism. Draw a ray diagram to show the path of rays.
2. Mark the least deviated colour in your diagram.
3. Why do different coloured rays deviate differently in a prism?

As light rays pass from air into a glass prism, are they refracted towards or away from the normal?

As light rays emerge from a glass prism into air, are they refracted towards or away from the normal?

In the formation of spectrum of white light by a prism:

1. which colour is deviated least?
2. which colour is deviated most?

In the formation of spectrum of white light by a prism:

 which colour is deviated most?

When a ray of light enters a prism, it bends ______ the normal; as it leaves the prism, it bends ______ the normal.

 What happens when a ray of ordinary light is passed through a triangular glass prism?

 What will happen if another similar glass prism is placed upside down behind the first prism?

When a beam of white light is passed through a prism, it splits to form lights of seven colours. Is it possible to recombine the lights of seven colours to obtain the white light again? Explain your answer.

What is spectrum?

In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum YX on the screen.

1. State the colour seen
   1. at X, and
   2. at Y.
2. Why do different colours of white light bend through different angles with respect to the incident beam of light?

In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum YX on the screen. 

Why do different colours of white light bend through different angles with respect to the incident beam of light?

Draw a diagram to show how white light can be dispersed into a spectrum by using a glass prism. Mark the various colours of the spectrum.

Describe how you could demonstrate that white light is composed of a number of colours.