Hydrogen Chloride MCQs Concise Class-10 ICSE Chemistry Selina Solutions Chapter-8. We Provide Step by Step Answer of MCQs Questions of Exercise-8 for ICSE Class-10. The given Solutions is according to the Latest editions. Visit official Website CISCE for detail information about ICSE Board Class-10.
Hydrogen Chloride MCQs Concise Class-10 ICSE Chemistry Selina Solutions Chapter-8
| Board | ICSE |
| Book / Publication | Concise / Selina |
| Subject | Chemistry |
| Class | 10th |
| Writer | Dr SP Singh |
| Chapter-8 | Study of Compounds – Hydrogen Chloride |
| Topics | MCQs |
| Edition | 2025-2026 |
MCQs Questions on Study of Compounds-Hydrogen Chloride
Page-150 (Choose the correct answer from the options given below).
Que-1: Hydrogen chloride molecule is:
(a) Polar covalent
(b) Non polar
(c) Ionic
(d) Co-ordinate
Ans:
(a) Polar covalent
Hint: HCl is a polar covalent molecule because it is formed by sharing of electrons between hydrogen and chlorine atoms. However, chlorine is more electronegative than hydrogen, so it pulls the shared electrons closer to itself. This creates a partial negative charge on chlorine and a partial positive charge on hydrogen, making the molecule polar.
Que-2: Hydrogen chloride gas being highly soluble in water is dried by
(a) Anhydrous calcium chloride
(b) Phosphorous pentoxide
(c) Quicklime
(d) Conc. sulphuric acid
Ans: (d) Conc. sulphuric acid.
Hint: Drying agent used for drying should only remove the moisture and not react with it, hence, conc. sulphuric acid is used as the drying agent.
Que-3: The aim of the Fountain experiment is to prove that:
(a) HCl turns blue litmus red
(b) HCl is denser than air
(c) HCl is highly soluble in water
(d) HCl fumes in moist air
Ans: (c) HCl is highly soluble in water
Hint: Fountain experiment is performed to show the great solubility of HCl gas in water.
Que-4: HCl dissolves in toluene (C6H5CH3) and the solution:
P- contains hydronium ions.
Q- can produce carbon dioxide on reacting with sodium carbonate.
R- does not show any acidic property.
Which of the following holds true?
(a) Only P
(b) Only Q
(c) Only R
(d) Both P and Q
Ans: (c) Only R
Hint: Toluene is an organic solvent and non-polar in nature. When HCl dissolves in toluene, it does not ionize to form hydronium [H3O+] ions. Since there are no free hydrogen ions, the solution does not show acidic properties and also cannot react with sodium carbonate to release carbon dioxide gas. Therefore, only R is correct — the solution does not show any acidic property.
The following questions are Assertion-Reason based questions. Choose the answer based on the codes given below.
1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.
Que-5:
Assertion (A): HCl is produced by the reaction of hydrogen and chlorine in diffused sunlight.
Reason (R): This reaction is explosive in sunlight.
(a) (1)
(b) (2)
(c) (3)
(d) (4)
Ans: (a) (1) Both A and R are true and R is the correct explanation of A.
Explain Why: HCl is produced, when moist hydrogen gas combines with chlorine in presence of diffused sunlight. Hence, assertion (A) is true.
H2 + Cl2 → 2HCl
The formation HCl is a explosive reaction in direct sunlight but it is negligible in dark. So, it is carried out in diffused sunlight. Hence, reason (R) is true.
Therefore, Reason (R) thus provides a valid explanation for why this reaction is occurring in diffused sunlight. Hence, Reason (R) is the correct explanation of assertion.
Que-6:
Assertion (A): The Fountain experiment is used to demonstrate the high solubility of HCl gas.
Reason (R): Red litmus solution turns blue in Fountain experiment.
(a) (1)
(b) (2)
(c) (3)
(d) (4)
Ans: (c) (3)A is true but R is false.
Explain Why: The principle of fountain experiment is to show the great solubility of the HCl gas. Hence the assertion (A) is true.
The blue litmus solution turns red due to the acidic nature of hydrogen chloride gas in the Fountain experiment. Hence reason (R) is false.
Que-7:
Assertion (A): HCl gas is collected by downward delivery.
Reason (R): HCl gas is heavier than air.
(a) (1)
(b) (2)
(c) (3)
(d) (4)
Ans: (a) (1) Both A and R are true and R is the correct explanation of A.
Explain Why: Hydrogen chloride gas is collected by the downward delivery (upward displacement of air). Hence, the assertion (A) is true.
HCl is collected by downward delivery because it is 1.28 times heavier than air. Hence, reason (R) is true and it is the correct explanation of assertion (A).
Que-8:
Assertion (A): HCl gas fumes in moist air.
Reason (R): HCl gas is highly soluble.
(a) (1)
(b) (2)
(c) (3)
(d) (4)
Ans: (a) (1) Both A and R are true and R is the correct explanation of A.
Explain Why: Hydrogen chloride (HCl) gas fumes in moist air because it is highly soluble in water. In the presence of moisture, HCl gas dissolves in water vapour in the air to form tiny droplets of hydrochloric acid, which appear as white fumes. So, both the assertion and the reason are true, and the reason correctly explains the assertion.
Que-9:
Assertion (A): HCl gas dissolves in water as well as organic compounds like toluene.
Reason (R): HCl is a polar covalent compound.
(a) (1)
(b) (2)
(c) (3)
(d) (4)
Ans: (a) (1) Both A and R are true and R is the correct explanation of A.
Explain Why: Hydrogen chloride (HCl) is a polar covalent compound, which means it can dissolve in polar solvents like water due to attraction between opposite charges. Interestingly, it can also physically dissolve in some non-polar organic solvents like toluene, but without ionizing. The reason HCl can dissolve in both is due to its polar covalent nature. Hence, both the Assertion (A) and Reason (R) are true, and Reason (R) correctly explains Assertion (A).
Que-10:
Assertion (A): HCl gas is used in the preparation of chlorine and chlorides.
Reason (R): Lead chloride is not produced from HCl.
(a) (1)
(b) (2)
(c) (3)
(d) (4)
Ans: (c) (3) A is true but R is false.
Explain Why: HCl gas dissociates into hydrogen and chlorine, when heated to 500°C and hydrogen chloride reacts with metals that come before hydrogen in the electrochemical series to form corresponding chlorides of those metals. Hence, assertion (A) is true.
When concentrated Hydrochloric acid is oxidised by strong oxidising agent like lead oxide lead chloride is formed. Hence, reason (R) is false.
Pb3O4 + 8HCl (conc.) ⟶ 3PbCl2 + 4H2O + Cl2 ↑
Que-11:
Assertion (A): HCl has sour taste.
Reason (R): HCl is highly soluble in water.
(a) (1)
(b) (2)
(c) (3)
(d) (4)
Ans: (b) (2) Both A and R are true but R is not the correct explanation of A.
Explain Why: Hydrogen chloride has sour (acidic) taste. Hence, the assertion (A) is true.
HCl is highly soluble in water and it can be proved by performing Fountain experiment. Hence, the reason (R) is true.
Therefore, the high solubility of HCl in water doesn’t relate to its taste, Hence, the reason (R) is not the correct explanation of assertion (A).
—: End of Study of Compounds – Hydrogen Chloride MCQs Concise Class-10 ICSE Chemistry Selina Solutions : –
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