Question

a grey coloured metal 'z' (atomic weight =65) is used in making dry cell it reacts with dilut HCL to liberate a colouerless gas
(a) identify the metal 'z'
(b) name the gas evolved
(c) give suitable charactersitic test for the gas​

Answer 1

• The metal is Zinc. It liberates hydrogen gas on reaction with HCl. So, the evolved gas is hydrogen.
• The grey coloured metal with atomic weight 65 u is zinc. Zinc reacts with dilute HCl acid to liberate hydrogen gas.

Answer 2

Answer:

a)The metal is Zinc.

b)It liberates hydrogen gas on reaction with HCl. The reaction is as follows:

 

Zn+ 2HCl ----> ZnCl2   + H2

So, the evolved gas is hydrogen.

c)when hydrogen gas is brought near a burning splinter it burns with a pop sound.

hope it helps

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