Question

2. A student added dilute HCl to 1 point
a test tube containing zinc
granules and made following
observations :
O
the zinc surface became dull and
black
o
a gas evolved which burnt with a
pop sound
the solution remained colourless
O
the solution becomes green in
colour
Clear selection​

Answer 1

Explanation:

Reaction:

Zn+2HCl→ZnCl

2

+H

2

Hydrogen is evolved by the reaction of dilute non oxidizing acids on reactive metal such as zinc and burns with a pop sound. The solution remained colourless.