A,B,C or D? Short chemistry question?

Question

When a solution is added to some magnesium ribbon, a gas which gives a 'pop' sound with a lighted splint, is released. What could this solution be?

A: Ammonia solution

B: Calcium hydroxide

C: Copper sulphate solution

D: Dilute sulphuric acid

Answer 1

the solution would be dilute H2SO4

Mg+H2SO4----------MgSO4+H2

hydrogen gas is a good combustible gas and by rapid burning gives pop sound and magnesium can displace H2 gas from dil acids like H2SO4 HNO3 etc

Answer 2

D

Answer 3

The 'pop' sound is typical of Hydrogen.

The only options containing Hydrogen is Calcium Hydroxide and Sulphuric Acid.

Sulfuric Acid reacts with Mg as shown:

H2SO4 + Mg = MgSO4 + H2

resulting in Hydrogen gas being given off.

Hence D is the answer.

Answer 4

the answer is D

The gas which gives a 'pop' sound is hydrogen gas. A metal will react with acid to produce hydrogen gas. The only acidic solution in the answer is sulphuric acid making it the correct answer.