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Online Tests
Chemistry 9th Class English Medium Unit 7 Online Test MCQs With Answers
Question # 1
A substance whcih can behave as an acid as well as a base is called
Choose an answer
Amphoteric specie
Acid
Base
Neutral specie
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Question # 2
Which one is not an Arrhenius base.
Choose an answer
KOH
NaOH
NH3
Ca(OH)2
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Question # 3
Whcih acid is present in our stomach.
Choose an answer
Nitirc Acid
Hydrochloric acid
Sulphuric acid
All of the above
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Question # 4
Which is used to manufacture soap?
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NH4OH
Ca(OH)2
NaOH
Mg(OH)2
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Question # 5
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
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Question # 6
Acidic Acid is used for
Choose an answer
Cleaning metal
Etching designs
Flavouring food
Making explosives
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Question # 7
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
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Question # 8
Milk of magnesia contains Mg(OH)2 It is used as antacid It neutralizes excess stomachaacid. Which salt is formed in this reaction.
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MgCl2
MgSO4
MgCO3
MgO
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Question # 9
How many hydroxide ions, calium hydroxide will release in water.
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2
1
3
zero
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Question # 10
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
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Question # 11
Acid rain has pH less than.
Choose an answer
6
7
7.4
5.6
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Question # 12
When a chemical reaction is carried out with a substancZ; a gas is produced which turns red litmus paper blue. What is the reaction?
Choose an answer
Reaction of an acid with a meal carbonate
Reactin of an alkali with ammonium salt
Reaction of an acid with ammonium salt
None of these
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Question # 13
In a neutralization reaction between KOH and H3PO4how many molecules of KOH will react with one molecule of H3PO4
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1
2
3
4
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