English Medium कक्षा १० - CBSE Question Bank Solutions for Science

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.

Why is an iron grill painted frequently?

Explain why, through aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air.

What is corrosion?

 Name any two metals which do not corrode easily.

What is the corrosion of iron known as?

What is meant by 'rusting of iron'? With the help of labelled diagrams, describe an activity to find out the conditions under which iron rusts.

Give the constituents and one use of brass.

Name two metals which resist corrosion due to the formation of a thin, hard and impervious layer of oxide on their surface.