Question

QUESTION . An element ‘X’ after reacting with acids liberates hydrogen gas and can displace lead and tinfrom their salt solution. The metal is:

(a)  Potassium

(b)  Calcium

(c ) Aluminium

(d) Nickel​

Answer 1

Answer:

copper aur potassium is the correct answer

Answer 2

Answer:

option (c) aluminium

Explanation:

• nickel is not stronger than lead so cannot displace x element .

• potassium can displace but will give hydrogen oxide

• and calcium if reacts with an acid than gives carbon dioxide

• so aluminium can displace x element will liberates hydrogen gas and also give the salt solution