IGCSE O Level Chemistry Practice Test 28

Chemical Symbols Multiple Choice Questions (MCQ) PDF - 28

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Chemical Symbols Questions and Answers PDF Download: Quiz 28

MCQ 136: All of these radicals have a valency of 1, except

A) OH

B) CO₃

C) NO₃

D) HCO₃

MCQ 137: The phase that never gains in sublimation is

A) solid

B) liquid

C) gas

D) vapors

MCQ 138: Elements with 1-3 valence electrons are called

A) metals

B) non-metals

C) inert gases

D) amphoteric oxides

MCQ 139: Sublimations are the substances which do not exist

A) at room temperature

B) in liquid state at ordinary pressures

C) in gaseous form at room temperatures

D) in gaseous form at ordinary pressures

MCQ 140: Upon heating, sodium nitrate NaNO₃_(s) gets converted into

A) sodium oxide

B) nitric acid

C) sodium hydrogen oxide

D) none of above

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