Question

M.M.: 55
(1X21=21)
A. Answer the following questions -
1. Name a non metal which is lustrous and a metal which is non lustrous,
2. Why are noble gases chemically less reactive?
3. What are amphoteric oxides? page=56
4. Generally, when metals are treated with minerals, acid, hydrogen gas is liberated
but when metals (except Mn amd Mg) treated with HNO3, hydrogen is not liberated
Why?
5. Why do ionic compounds not conduct electricity in the solid state? 49 Page
6. i) Name a metal which is liquid and does not stick to glass.
ii) Name the metal which is commonly used in thermite welding.
7. Write the name and general formula of 5th member of homologous series having
general formula CnH2n.
8. Name the functional groups present in the following compounds, butanol, Butanal
9. Give electron dot structure of propene molecule.
10. Name the process by which unsaturated fats are changed to saturated fats.​

Answer 1

Answer:

Explanation:

1. A NON METAL WHICH IS LUSTOROUS IS DIAMOND AND C60,A METAL WHICH IS NON LUSTOROUS MERCURY.

2. NOBLE GASES ARE LESS REACTIVE BECAUSE THEY ALREADY FILLED WITH VALANCED ELECTRONS.

3. AMPHOTERIC OXIDES ARE THOSE OXIDES WHICH REACT WITH ACIDS AS WELL AS BASES.FOR E.G.-ZINC OXIDE,ALUMINIUM OXIDE.

4. Nitric acid (HN0 3) is a strong oxidising agent. So, as soon as hydrogen gas is formed in the reaction between a metal and dilute nitric acid. The nitric acid oxidises this hydrogen to water and itself gets reduced to N0 2 or NO .

5.

Answer 2

1. Bromine, sodium
2. They have a octet structure
3. They show both acidic and basic
4. Hno3 is a strong oxidising agent so the evolution of hydrogen is oxidised to h2 o