Question

35. Equal length of magnesium ribbon are taken in two test tubes 'A' and 'B”. Sulphuric acid
is added to test tube 'A' and carbonic acid in the teat tube 'B' in equal amounts: (3)

a) Identify the test tube showing vigorous reaction. Give reason to support your
answer.

b) Name the gas liberated in both the test tubes. How will you prove its liberation?

c) Out of the two acids taken above
i) Which one will have lower pH value.
ii) Lower H* concentration respectively.​

Answer 1

Answer:

see below

Explanation:

1) as sulphuric acid is stronger than the other, vigorous reaction takes place with it

2) hydrogen gas is liberated in both the reactions.

since Mg is a metal,

metal + acid ~ salt + hydrogen

a burning stick puts off flame if tested

3)i) pH value is low for sulphuric acid

ii) which means the same has more H*concentration