Question

SECTION - A
Write the answer in 30 words. Each question carries 2 marks.
1) Although, nanotechnology is considered as an invention of modern
science, but its use has been identified from long past. Give four examples
of history of nanotechnology.
OR
[2]
How nanotechnology is useful in the field of security? Explain.
2)
Give the rules for how much metal is deposited on the electrode in the
process of electrolysis?
3)
What is polymerisation? Explain it by equation.
OR
Write four properties of methane.​

Answer 1

Answer:

1. Methane is lighter than air
2. It haveing a specific gravity of 0.554
3. It burns readily in air.
4. It is only slightly soluble in water