P-1 Periodic Classification of Element — Science STD 10 — Question

Name the part of the retina which is insensitive to light.

Give one example of the movement of a plant part which is caused by the loss of water (or migration of water).

Name the chemical compound which is electrolysed in molten state to obtain sodium metal. Which gas is produced in this process?

The amount of water vapour in air is determined in terms of its………..

What are the two main ways in which common salt (sodium chloride) occurs in nature?

Name the unit which is commonly used for expressing the energy released in nuclear reactions.

Sodium hydroxide is used in the preparation of soap from fats and oils.

Translate the following statement into chemical equation and then balance it:
Barium chloride solution reacts with aluminium sulphate solution to form a precipitate of barium sulphate and aluminium chloride solution.

Which component of biogas is used as a fuel?