Question

Match the Columns:
Column A Column B
(i) Silica A. NaHCO₃
(ii) Caustic Soda B. SiO₂
(iii) Washing Soda C. NaOH
(iv) Baking Soda D. CaCO₃
(v) Lime Stone E. Na₂CO₃

Answer 1

Explanation:

SILICA - SiO2

CAUSTIC SODA - NAOH

WASHING SODA - NA2CO3

BAKING SODA NAHCO3

LIME STONE - CACO3

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Answer 2

Matching column A with column B :

i) Silica - SiO₂

The chemical name of silica is silicon dioxide. Hence, it has the molecular formula of SiO₂.

ii) Caustic Soda - NaOH

The chemical name of caustic soda is sodium hydroxide. Therefore, the molecular formula of caustic soda is NaOH.

iii) Washing soda - Na₂CO₃

The chemical name of washing soda is sodium carbonate. Therefore, the molecular formula of washing soda is Na₂CO₃.

iv) Baking soda - NaHCO₃

Baking soda is the common name for the compound, sodium hydrogen carbonate, having a chemical formula of NaHCO₃.

V) Lime stone - CaCO₃

Calcium carbonate is commonly known as lime stone. Therefore, lime stone is chemically represented as CaCO₃.