Question

cloth strip dipped in onion juice is used for testing a liquid ‘X’. The liquid ‘X’ changes its odour. Which

type of an indicator is onion juice ? The liquid ‘X’ turns blue litmus red. List the observations the liquid ‘X’

will show on reacting with the following : (a) Zinc granules (b) Solid sodium carbonate Write the chemical

equations for the reactions involved​

Answer 1

Explanation:

X is carbon monoxide gas (CO); Y is hydrogen gas H

2

; Z is methanol (or Methyl alcohol) (CH

3

OH)

Note: CH

4

O=CH

3

OH= methanol.

b) Formation of Z;

CO(g)+2H

2

(g)

300atm, 300

0

C

ZnO, CrO

3

CH

3

OH(l)

Methanol (Methyl alcohol)

The conditions for this reaction to take place are: a pressure of 300 atmosphere (written as 300 atm), a temperature of 300

0

C , and a catalyst which is a mixture of zinc oxide and chromium oxide (ZnO+CrO

3

)