Acids, Bases and Salts — Science STD 10 — Question

The focal length of a lens with power 2.5 D is………..

If objects of equal masses are given equal heat, their final temperature will be different. This is due to difference in their……………

What is the major difference between the simple alternator and most practical alternators?

How is the power of a lens related to its focal length?

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.

Name the raw material used for the preparation of plaster of Paris.

State the SI and CGS units of G.

Name the types of wires or cables used in the electric power supply provided by the State Electricity Board for houses and factories.

Convey the following information in the form of a balanced chemical equation:
“An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution.”

Aluminium hydroxide reacts with sulphuric acid to form aluminium sulphate and water. Write a balanced equation for this reaction.