Name the tree: The stilt roots are underwater during high tide.

Briefly explain: Rooftop rainwater harvesting

What was meant by the term ‘Imperialism’, as a cause for World War I?

Sonia had a recurring deposit account in a bank and deposited ₹600 per month for 2½ years. If the rate of interest was 10% p.a., find the maturity value of this account.

The given diagram shows a stage during mitotic division in an animal cell:

1. Identify the stage. Give a reason to support your answer.
2. Draw a neat labelled diagram of the cell as it would appear in
...

Give one word or a phrase: The chemical bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.

Name any two leaders of the Khilafat Movement.

Match the salts given in Column I with their method of preparation given in Column II:

Give a reason for each of the following: Mawsynram receives the highest average annual rainfall.

The canal through which the testes descend into the scrotum just before the birth of a male baby.

Give the Biological / technical term.

Identify the gas evolved and give the chemical test in each of the following cases:

1. Dilute hydrochloric acid reacts with sodium sulphite.
2. Dilute hydrochloric acid reacts with iron (II) sulphide.

Action of dilute Sulphuric acid on Sodium Sulphite.

Write balanced chemical equation.

Laboratory preparation of Nitric acid

Give the geographic term for each of the following:

1. Non-mulberry silk produced in Madhya Pradesh.
2. Rejected cane after crushing.
3. The rearing of silk worms to obtain silk.

Identify the substances underlined: The dilute acid which is an oxidizing agent.

The equation $ \ce{4NH3 +5O2 -> 4NO + 6H2O} $, represents the catalytic oxidation of ammonia. If 100 cm³ of ammonia is used calculate the volume of oxygen required to oxidise the ammonia completely.