English Medium कक्षा १० - CBSE Question Bank Solutions for Science

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?

The corrosion of iron is called ______.

The process of depositing a thin layer of zinc on iron articles is called ______.

Tiffin boxes are electroplated with ______ but car bumpers are electroplated with ______ to protect them from rusting.

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

______ and ______ are necessary for the rusting of iron.

Why is an iron grill painted frequently?

Explain why, though 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?

With the help of labelled diagrams, describe an activity to find out the conditions under which iron rusts.

Give the constituents of brass.