IGCSE O Level Chemistry MCQs - Chapter 3

Chemical Formulae and Equations Multiple Choice Questions PDF Download - 5

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Chemical Formulae & Equations Questions & Answers PDF Download: MCQ Quiz 5

MCQ 21: The formula of carbonic acid is

A) HCO₂

B) HCHO₃

C) H₂CO₂

D) H₂CO₃

MCQ 22: To balance Al(OH)₃ + HNO₃ → Al(NO₃)₃ + H₂O, number of Al(OH)₃ molecules will be

A) 1

B) 2

C) 3

D) 4

MCQ 23: In Na₂CO₃.10H₂O, percentage of water is

A) 0.5009

B) 0.1699

C) 0.6507

D) 0.6294

MCQ 24: All of these radicals have a valency of 1, except

A) OH

B) CO₃

C) NO₃

D) HCO₃

MCQ 25: A white smoke consisting of fine white solid particles is formed by

A) propane

B) butane

C) magnesium oxide

D) tin oxide

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Chemical Formulae and Equations MCQs

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