Question

8. (a) An organic compound A with molecular formula C2H4O2 on reaction with Sodium metal

Na releases a gas B which readily catches fire. A on reacting with Ethanol in the presence of

concentrated Sulphuric acid gives a sweet smelling substance C used in making perfumes.

Write a balanced chemical equation to represent these two reactions and identify the

compounds A, B and C.

(b) Differentiate between metals and non metals?

9. (a) Draw a sectional view of human female reproductive system and label the part where:

(i) Eggs develop.

(ii) Fertilisation takes place.

(iii) Fertilised egg gets implanted.

(b) Describe, in brief, the changes the uterus undergoes

(i) To receive the zygote.

(ii) If zygote is not formed.

Answer 1

Compounds

A- ethanoic acid
B-hydrogen
C-ethyl ethanoate(ester

Reaction A:

2CH3COOH +2Na -----> 2CH3COONa + H2

Reaction B:

CH3COOH +C2H5OH -----> CH3COOC2H5 +H2O

Nonmetals are brittle, not ductile and poor conductors of heat
Metals are good conductors of heat, malleable and ductile

*Don't know much about the female reproductive system

Answer 2

Compound A is ethanoic acid
Gas B is hydrogen gas
substance C is ester

C2H4O2 + Na ➡ C2H3O2Na + H2⬆
C2H4O2 + Ethanol ➡ CH3 C O CH2 CH3
| |
O