Acids Bases and Salts Test

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Acids Bases and Salts Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following salts contains water of crystallization?

I. Gypsum

II. Epsom salt

III. Blue vitriol

IV. Glauber’s salt

A
I and II

B
III and IV

C
II and IV

D
I, II, III, IV

Solution

Explanation:

All the above salts contain water of crystallisation and their chemical formulae are given below:

Gypsum - CaSO4.2H₂O - (2 molecules of water of crystallisation)

Epsom salt- MgSO₄.7H₂O - (7 molecules of water of crystallisation)

Blue vitriol - CuSO₄.5H₂O - (5 molecules of water of crystallisation)

Glauber's salt - Na₂SO₄.10H₂O - (10 molecules of water of crystallisation)
Question 2
1 / -0

What is the colour of phenolphthalein in soap solution?

A
colorless

B
orange

C
blue

D
Pink

Solution

Explanation:

Phenolphthalein turn pink in colour in basic solutions and soap is basic in nature.
Question 3
1 / -0

Which one of the following types of medicines is used for treating acidity?

A
Antibiotic

B
Analgesic

C
Antiseptic

D
Antacid

Solution

Explanation:

Antacids are mild bases,which when given to a person suffering from acidity, neutralises the effect of excess acid produced in the stomach giving relief.
Question 4
1 / -0

A, B, C, D are samples of liquids having pH values of 14, 7, 1, 5 respectively. Which of these could be that of 1 M NaOH solution?

A
Sample D

B
Sample B

C
Sample A

D
Sample C

Solution

Explanation:

NaOH is basic in character and higher the pH, stronger is the base.
Question 5
1 / -0

Name the acid formed when SO₂ is dissolved in water

A
H₂S₂O₅

B
H₂SO₃

C
H₂SO₄

D
HSO₄

Solution

Explanation:

Sulphurous acid is formed on dissolving SO₂ in water.
Question 6
1 / -0

Which of the following conducts electricity?

Rain water, distilled water, potable water

A
Rain water, distilled water, potable water

B
distilled water, potable water

C
rain water, distilled water

D
rain water, potable water

Solution

Explanation:

Distilled water is the purest form of water and it does not contain any acids dissolved in it,so it does not conducts electricity.

Potable water has minute impurities present in it which results in its low conductivity.

Rain water, on combining with CO₂ gas in the atmosphere produces carbonic acid (H₂CO₃) which reacts with to form hydrogen ions,and then conducts electricity.
Question 7
1 / -0

What is the nature of non metallic oxides?

A
Neutral oxide

B
Acidic oxide

C
Basic oxide

D
Amphoteric oxide

Solution

Explanation:

Bases react with non-metallic oxides to form salt and water. This reaction is similar to the neutralisation reaction in which acids react with bases to form salt and water. This shows that non-metallic oxides are acidic in nature.
Question 8
1 / -0

“Alcohols and glucose contain hydrogen but are not treated as acids”

A
False

B
No plausible explanation

C
True

D
These two are exceptions

Solution

Explanation:

This is true that alcohols and glucose contain hydrogen ions in them but they do not dissociate to produce hydrogen ions and hence are unable to show acidic behaviour.
Question 9
1 / -0

Lemon contains

A
Lactic acid

B
Tartaric acid

C
citric acid

D
Formic acid

Solution

Explanation:

Lemon constitutes citric acid and is therefore referred under the category of citrus fruits.
Question 10
1 / -0

Which of the following salt is used in lab to seal air gaps in apparatus so as to make the air tight arrangement?

A
CaSO₄.1/2 H₂O

B
MgSO₄.7H₂O

C
ZnSO₄.7H₂O

D
CaSO₄.2H₂O

Solution

Explanation:

POP is used in chemical laboratories for sealing air gaps in apparatus where air-tight arrangement is required.

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Acids Bases and Salts Test - 1

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Acids Bases and Salts Test - 1

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Question 1

I and II

III and IV

II and IV

I, II, III, IV

Solution

Question 2

colorless

orange

blue

Pink

Solution

Question 3

Antibiotic

Analgesic

Antiseptic

Antacid

Solution

Question 4

Sample D

Sample B

Sample A

Sample C

Solution

Question 5

H2S2O5

H2SO3

H2SO4

HSO4

Solution

Question 6

Rain water, distilled water, potable water

distilled water, potable water

rain water, distilled water

rain water, potable water

Solution

Question 7

Neutral oxide

Acidic oxide

Basic oxide

Amphoteric oxide

Solution

Question 8

False

No plausible explanation

True

These two are exceptions

Solution

Question 9

Lactic acid

Tartaric acid

citric acid

Formic acid

Solution

Question 10

CaSO4.1/2 H2O

MgSO4.7H2O

ZnSO4.7H2O

CaSO4.2H2O

Solution

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H₂S₂O₅

H₂SO₃

H₂SO₄

HSO₄

CaSO₄.1/2 H₂O

MgSO₄.7H₂O

ZnSO₄.7H₂O

CaSO₄.2H₂O