Carbon and its Compounds — Science STD 10 — Question

Name two non-metals which are both brittle and non-ductile.

Name the element which is in:

1. First group and third period.
2. Seventeenth group and second period.

Name two anti-oxidants which are usually added to fat and oil containing foods to prevent rancidity.

What type of bonds are present in hydrogen chloride and oxygen?

What is the common name of the compound CaOCl?

Name three chemicals made from common salt (or sodium chloride).

What are the materials used for the preparation of bleaching powder?

Name the non-metal which is used:
To convert vegetable oil into vegetable ghee(solid fat).

Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?

Explain why, alkanes are excellent fuels.