Question

a test tube with a few zinc pieces is taken an acid is added to it zinc chloride solution along with a colourless gas which puts off a burning matchstick with a 'pop' sound (a)name the gas involved in it and also the acid used (b)write balanced chemical equation for the reaction​

Answer 1

Answer:

hydrogen gives a pop sound when exposed to heat so gas evolved is HYDROGEN and the acid used is HYDOCHLORIC ACID (HCl)...

2HCl+Zn>>>>ZnCl2+H2 the balanced equation of the above reaction.......

Answer 2

Answer:

(a) hydrogen H2

The acid used is HCl (Hydrochloric acid)

(b)Zn + 2HCl → ZnCl2 + H2

Explanation:

(a) Whenever in the question it's given if the gas makes a pop sound when brought near fire.. always keep it in mind that the gas evolved is H2.

As the product fromsed is ZnCl2 ya Zinc Chloride we can also make it sure that the acid used is HCl.

(b) Zn + HCl gives ZnCl2 + H2

To balance the no. of H and Cl atoms

We multiply HCl with 2

Hope it helped...