Question

8. Write the following properties of ethene:
(a) Physical state,
(b) Odour,
(c) Density as compared to air,
(d) Solubility.
9. How would you convert :
(a) ethene into 1,2-dibromoethane?
(b) ethene into ethyl bromide ?
10. Give balanced equations when :
(a) ethene is burnt in excess of oxygen.
(b) ethene reacts with chlorine.
(c) ethene combines with hydrogen chloride.
(d) a mixture of ethene and hydrogen is passed over
nickel at 200°C.
12. Write the name and formula of the product formed in
each case below:
(a) C2H4 + C2 --> .......
(b) C2H5Br + KOH (alc.)-> .............
(c) H2C = CH2 alk. KMnO 4 ->............
(d) H2C = CH2 + HBr ->........
13. What do you observe when ethylene is passed through
alkaline KMnO4 solution ?
14. Name three compounds formed by ethylene and give one
use of each compound.​

Answer 1

Question 8----

a) Physical state: Ethene is a colorless and inflammable gas. (b) Odour: It has a faint sweetish odor. (c) Density as compared to air: It has density less than one hence it is lighter than air. (d) Solubility: It is sparingly soluble in water but highly soluble in organic solvents like alcohol, ether, and chloroform.

Question 9---

( in the given pic)

Question 10

(a) CH4 + 302 → 2CO2 + 2H2O + heat

(b) CH2 = CH2+Cl »CH2(CI) - CH2(Cl)

(c) CH2 = CH2 + HC1 CH3 - CH2-Cl

(d) CH4 + H2 200°C----ni----> C2H6