Question

Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in
reaction mixture. He made the same observations when this element was treated with hydrochloric acid.

The element M is
a) Metallic b) Non-metallic c) Liquid metal d) Amphoteric

Answer 1

Answer:

It is a lustrous, divalent element so it is a metal and only very reactive metal can react with NaOH. In the first case; a base reacts with a metal, and in the second case; an acid reacts with a metal. Hence, hydrogen gas is most likely to be produced during these reactions.

The evolution of hydrogen gas can be checked by bringing a burning matchstick or splinter near the evolved gas. The fact that the matchstick burns with a pop sound, shows that hydrogen gas is evolved.

The reactions can be shown by following equations:

2NaOH+Zn→Na

2

ZnO

2

+H

2

2HCl+Zn→ZnCl

2

+H

2

Hope you. understand my answer right

Answer 2

Answer:

nahi ata

Explanation:

ab kaya explanation du bhak