Chemistry
Grade-8
Easy

Question

Read the following paragraph and answer the following question.
When sulphuric acid reacts with carbonates, a salt like ferrous sulphate, water and CO2are formed as products. The carbon dioxide causes bubbling during the reaction.
H subscript 2 S O subscript 4 plus F e C O subscript 3 rightwards arrow F e S O subscript 4 plus H subscript 2 O plus C O subscript 2
The property, in which formation of gas bubbles in the liquid takes place during the above chemical reactions is called as

  1. Evaporation
  2. Effervescence
  3. Crystallization
  4. Condensation

hintHint:

The synonym is froth or fizz.

The correct answer is: Effervescence


    • Effervescence is the release of gas from an aqueous solution and the foaming or bubbling resulting from this release.
    • The word frothy comes from the Latin verb fervere, preceded by the adverb ex. It has the same root as the word fermentation.

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