Equal lengths magnesium ribbons are taken in test tubes A and B. Hydrochloric acid () is added to test tube A, while acetic acid () is added to test tube A, while acetic acid () is added to test tube B. Amount and concentration taken for both the acids are the same. In which test tube will the fizzing occur more vigorously?

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

Test tube second with acetic acid

Test tube one with hydrochloric acid.

In both test tubes, equal fizzing will occur.

No fizzing will occur

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Concept- When an acid reacts with a metal, it will produce a salt and hydrogen gas.
The production of hydrogen gas is responsible for the fizzing sound.
Acetic acid is a weak acid and hydrochloric acid is strong acid. A weak acid does not dissociate completely , thus the extent of reaction of magnesium with weak acid is less than the reaction with strong acid.

Mg + 2 C H_{3} COOH \to Mg (C H_{3} COO)_{2} + H_{2}

Mg + 2 HCl \to MgC l_{2} + H_{2}

In the test tube one magnesium and acetic acid is added and in the test tube second magnesium and hydrochloric acid is added. As the hydrochloric acid is more stronger than acetic acid. So, fizzing occurs more vigorously in the test tube one with hydrochloric acid.
Hence, the correct option is (2).

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th