Acid, Bases and Salts Test

Result

Acid, Bases and Salts Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following equations correctly shows dissociation of acetic acid in water?

A
CH₃COOH + H₂O CH₃CO^- + H₂O

B
CH₃COOH + H₂O H₃O⁺ + CH₃COO^-

C
CH₃COOH + H₂O CH₃COOH + OH^-

D
CH₃COOH + H₂O CH₃COO^- + OH^-

E
CH₃COOH + H₂O CH+ CO₂ + OH^-
Question 2
1 / -0

Which of the following salts will produce dirty green precipitate when treated with sodium hydroxide solution?

A
NH₄Cl

B
NaCl

C
FeSO₄

D
ZnSO₄

E
CuSO₄
Question 3
1 / -0

Which of the following statements is not correct about physical properties of acids?

A
Acids taste sour.

B
Mineral acids are corrosive in nature.

C
Acids are weak electrolytes.

D
Acids change the colour of indicators.

E
None of these
Question 4
1 / -0

Which of the following acids is weak and does not ionise completely?

A
HCl

B
H₂SO₄

C
HNO₃

D
CH₃COOH

E
All of these
Question 5
1 / -0

Which of the following acids is used in the preparation of white vitriol?

A
Nitric acid

B
Oxalic acid

C
Sulphuric acid

D
Hydrochloric acid

E
Acetic acid
Question 6
1 / -0

Which of the following methods is used to prepare salt such as sodium bisulphate?

A
Direct combination

B
Simple displacement

C
Decomposition by acids

D
Neutralisation

E
Action of metal with alkali
Question 7
1 / -0

Molecule of which of the following acids will produce the highest number of hydronium ions?

A
Acetic acid

B
Sulphuric acid

C
Oxalic acid

D
Phosphoric acid

E
Sulphorous acid
Question 8
1 / -0

Consider the following substances.
(a) Blue vitriol
(b) Plaster of Paris
(c) Potassium permanganate
(d) Sugar
Which of the given substances contain(s) water of crystallisaton?

A
(a) and (b)

B
(b) and (c)

C
(c) and (d)

D
(d) and (a)

E
(a) and (c)
Question 9
1 / -0

Which of the following expressions is true for a solution with pH less than 7?

A
[H⁺] = [OH^-]

B
[H⁺] > [OH^-]

C
[H⁺] < [OH^-]

D
[H⁺] = 0

E
[OH^-] = 0
Question 10
1 / -0

Which of the following methods of formation of salts involves decomposition by acids?

A
2Fe + 3Cl₂ 2FeCl₃

B
Zn + H₂SO₄ ZnSO₄ + H₂

C
NaHCO₃ + HCl NaCl + H₂O + CO₂

D
2HCl + MgO MgCl₂ + H₂O

E
2KOH + ZnO K₂ZnO₂ + H₂O
Question 11
1 / -0

Consider the following salts. Which of the following are mixed salts?

(a) Na₂SO₄
(b) NaHSO₄
(c) CaOCl₂
(d) NaKCO₃

A
(a) and (b)

B
(b) and (c)

C
(c) and (d)

D
(d) and (a)

E
(a) and (c)
Question 12
1 / -0

Which of the following methods is used for preparation of insoluble hydroxides of metals?

A
Action of water on metals

B
Action of water on soluble metallic oxide

C
Double decomposition

D
Action of oxygen on metal sulphides

E
Decomposition of salts
Question 13
1 / -0

Which of the following acids is used in car batteries?

A
Nitric acid

B
Hydrochloric acid

C
Sulphuric acid

D
Carbonic acid

E
None of these

Solution

Sulphuric acid is used in car batteries.
We should know that batteries are made with electrolytes which can be acidic or basic. As we know the most well-known acid-based battery is the lead-acid battery. First, let us know about lead-acid batteries, generally, a typical lead-acid battery contains varying concentrations of water acid. As we know sulphuric acid has a higher density than water, which causes the acid formed at the plates during the charging and discharging to flow downward and collect at the bottom of the battery. An easy way to explain this process is, beforehand sulphuric acid and water mixture is used, as we know the battery plates are made of lead, which has very loosely bound atoms. The electrolyte i.e., sulphuric acid and water. Releases the atom's electrons from their orbits. Now, when a circuit is made you will see the electron flow or current. We can now charge a battery to replace these electrons.
Hence, the correct option is (C).
Question 14
1 / -0

Which of the following substances will show efflorescence?

A
Quick lime

B
Silica gel

C
Phosphorus pentaoxide

D
Washing soda

E
Conc. sulphuric acid
Question 15
1 / -0

Which one of the following is the correct product of the reaction of hydrochloric acid with calcium carbonate?

A
Ca(OH)₂ + H₂O

B
CaCl₂ + H₂O + CO₂

C
CO₂ + H₂O

D
CaCl₂ + H₂O