English Medium इयत्ता १० - CBSE Question Bank Solutions

A beam of white light falls on a glass prism. The colour of light which undergoes the least bending on passing through the glass prism is:
(a) violet
(b) red
(c) green
(d) blue

The colour of white light which suffers the maximum bending (or maximum refraction) on passing through a glass prism is:
(a) yellow
(b) orange
(c) red
(d) violet

Which of the following colour of white light is least deviated by the prism?
(a) green
(b) violet
(c) indigo
(d) yellow

The colour of white light which is deviated the maximum on passing through the glass prism is:
(a) blue
(b) indigo
(c) red
(d) orange

The splitting up of white light into seven colours on passing through a glass prism is called:
(a) refraction
(b) deflection
(c) dispersion
(d) scattering

Which of the following coloured light has the least speed in glass prism?
(a) violet
(b) yellow
(c) red
(d) green

The coloured light having the maximum speed in glass prism is:
(a) blue
(b) green
(c) violet
(d) yellow

Which of the following colour of white light has the least wavelength?
(a) red
(b) orange
(c) violet
(d) blue

Out of the following, the colour of light having the maximum wavelength is:
(a) violet
(b) indigo
(c) green
(d) orange

Why do you not see a spectrum of colours when light passes through a flat pane of glass?

What is meant by galvanisation? Why is it done?

Name the metal which is used for galvanising iron.

Explain why, iron sheets are coated with zinc.

State two conditions for the rusting of iron.

In one method of rust prevention, the iron is not coated with anything. Which is this method?

Fill in the following blank with suitable word:

The corrosion of iron is called ................

Fill in the following blank with suitable word:
The process of depositing a thin layer of zinc on iron articles is called .............

Fill in the following blanks with suitable words:
Tiffin boxes are electroplated with .............. but car bumpers are electroplated with ............... to protect them from rusting.

Fill in the following blank with suitable word:

The corrosion of copper produces a .............. coating of basic copper carbonate on its surface

Fill in the following blanks with suitable words:
............ and .............. are necessary for the rusting of iron.