Acids, Bases and Salts - ICSE STD 7 CHEMISTRY Questions

Q 1MCQ1 Mark

Which compound is used in the paper industry for bleaching wood pulp ?

✓
Bleaching powder
B
Washing soda
C
Sodium hydroxide
D
Sodium chloride

Answer: A.

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Q 2MCQ1 Mark

A basic solution has a pH

A
< 7
✓
> 7
C
= 7
D
None of these

Answer: B.

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Q 3MCQ1 Mark

Which of the following is a natural indicator ?

A
Blue vitriol
B
Baking soda
C
Washing soda
✓
Turmeric

Answer: D.

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Q 4MCQ1 Mark

Which of the following is used as an antacid ?

✓
$Mg(OH)_2$
B
$NH_4OH$
C
$KOH$
D
$NaOH$

Answer: A.

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Q 5MCQ1 Mark

Which of the following hydroxides is not an alkali ?

A
Ammonium hydroxide
B
Calcium hydroxide
✓
Copper hydroxide
D
Sodium hydroxide

Answer: C.

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Q 6[1 Mark Question Answer]1 Mark

Which gas is liberated when an acid reacts with a metal?

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Q 7[1 Mark Question Answer]1 Mark

All alkalis are bases but all bases are not alkalis.

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Q 8[1 Mark Question Answer]1 Mark

Acids are not stored in metal containers.

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Q 9[1 Mark Question Answer]1 Mark

Which one is an alkali-sodium hydroxide or copper (II) hydroxide ?

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Q 10[1 Mark Question Answer]1 Mark

What happens when an acid reacts with a base ?

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Q 11[2 Mark Question Answer]2 Marks

Ammonium hydroxide is a weak base.

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Q 12[2 Mark Question Answer]2 Marks

One molecule of acetic acid has four hydrogen atoms, yet it is called a monobasic acid.

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Q 13[2 Mark Question Answer]2 Marks

Define the terms : pH scale

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Q 14[2 Mark Question Answer]2 Marks

Define the terms : Neutralization

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Q 15[2 Mark Question Answer]2 Marks

Define the terms : Alkali

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Q 16[3 Mark Question Answer]3 Marks

Name the salt used in :
$a.$ The manufacture of glass and soap.
$b.$ The manufacture of fertilizers
$c.$ Fire extinguishers

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Q 17[3 Mark Question Answer]3 Marks

Name :
$a.$ Two bases which are not alkalis
$b.$ A normal salt and an acid salt of the same acid

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Q 18[3 Mark Question Answer]3 Marks

State two uses for each of the following acids :
a. Hydrochloric acid
b. Nitric acid
c. Sulphuric acid

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Q 19[3 Mark Question Answer]3 Marks

What is the difference between a strong acid and a weak acid ? Give two examples of each of them.

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Q 20[3 Mark Question Answer]3 Marks

While diluting a concentrated acid why is it recommended that the acid should be added to water and not water to the acid ?

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Q 21[5 Mark Question Answer]4 Marks

What is the difference between an acid salt and a normal salt ?

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Q 22[5 Mark Question Answer]4 Marks

State one important use of the following :
$a.$ Caustic soda
$b.$ Slaked lime
$c.$ Ammonium hydroxide
$d.$ Magnesium hydroxide

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Q 23[5 Mark Question Answer]4 Marks

What happenswhen an acid reacts with a base ? Explain by giving a suitable example. What is the special name for such a reaction ?

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Q 24[5 Mark Question Answer]4 Marks

Define the basicity of an acid. Also differentiate between monobasic, dibasic and tribasic acids.

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Q 25Fill in the blanks.1 Mark

An ____________ is a substance that changes its colour in acidic and basic solutions.

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Q 26Fill in the blanks.1 Mark

Bases give _________ colour with phenolphthalein.

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Q 27Fill in the blanks.1 Mark

An alkali is a compound which, when dissolved in water, yields _____________ ion as the only negatively charged ion.

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Q 28Fill in the blanks.1 Mark

A/An __________ salt is the one in which the hydrogen of an acid has been partially replaced by a metal.

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Q 29Fill in the blanks.1 Mark

The reaction between an acid and a base is called ___________

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Q 30TRUE / FALSE1 Mark

Bleaching powder is used for disinfecting drinking water.

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Q 31TRUE / FALSE1 Mark

Litmus is a natural indicator obtained from a plant.

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Q 32TRUE / FALSE1 Mark

Sodium hydrogencarbonate is commonly known as baking soda.

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Q 33TRUE / FALSE1 Mark

Copper(II) oxide (CuO) is a base that is soluble in water.

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Q 34TRUE / FALSE1 Mark

Aluminium hydroxide is an alkali.

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Q 35Do as Directed.1 Mark

A salt used for the preparation of plaster of Paris

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Q 36Do as Directed.1 Mark

A salt used for quick sedimentation of suspended particles in drinking water

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Q 37Do as Directed.1 Mark

A chemical substance used to identify acids or bases

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Q 38Do as Directed.1 Mark

A base used for neutralizing acidic soil

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Q 39Do as Directed.1 Mark

A base which is soluble in water.

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Acids, Bases and Salts question types

Acids, Bases and Salts questions

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Acids, Bases and Salts CHEMISTRY - Acids, Bases and Salts

Acids, Bases and Salts question types

Acids, Bases and Salts questions

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