Question # 1

While baking which gas is responsible for raising the bread and making it soft?

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Oxygen

Carbon monoxide

Carbon di oxide

Nitrogen

Ammonia is a base, because it

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Ionizes in water to give OH- Ions

Can accept proton

Contains OH group

Can accept an election pair

Which is used to manufacture soap?

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NH4OH

Ca(OH)2

NaOH

Mg(OH)2

A base is a substance which neutralizes an acid. Which of these substances is not aa base.

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Aqueious ammonia

Calcium oxide

sodium Chloride

Sodium carbonate

Predict themain characteristics of the reactions of metals with acids.

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Metals are dissolved

Hydrogen gas is envolved

Metals are coverted into salts

All the above mentioned characteristics are true

According to Arrhenius concept acid is a substance which dissociates in aqueious solutin to give.

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Proton

Pair of Electron

Hydrogen Ions

Hydroxide ion

Alkalis react with ammonium salts to librate.

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CO2

SO2

H2

NH3

A reaction between an acid and a base produces

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Salt and an acid

Sald and base

Salt and water

Salt and gas

All Acids turn blue litmus.

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Pink

White

Colourless

Red

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Chemistry 9th Class English Medium Unit 7 Online Test MCQs With Answers

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