Which of the following halogen acids has the lowest boiling point?

(1) HF

(2) HCl

(3) HBr

(4) HI

Subtopic:  Group 17 - Preparation, Properties & Uses |
 59%
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Spirit of salt is:

(1) HBr

(2) HCl

(3) H2SO4

(4) HI

Subtopic:  Group 17 - Preparation, Properties & Uses |
 54%
From NCERT
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Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. This is due to:

(1) strong affinity of HCl gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke

(2) due to strong affinity for water, conc. HCl pulls moisture of air towards self. The moisture forms droplets of water and hence the cloud.

(3) Conc. HCl emits strongly smelling HCl gas all the time

(4) Oxygen in air reacts with mitted HCl gas to form a cloud of Cl2 gas

Subtopic:  Group 17 - Preparation, Properties & Uses |
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Consider the following reactions:

(A) Cl2 reacts with an aqueous Na2SO3 solution

(B) Cl2 is passed through suspension of iodine

(C) Cl2 reacts with dry SO2

(D) Cl2 is passed through an aqueous SO2 solution

Select the reactions in which HCl is produced

(1) A, B, C, D

(2) A, B, D

(3) B, D

(4) all of these

Subtopic:  Group 17 - Preparation, Properties & Uses |
 56%
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Pure HBr may be obtained by heating sodium bromide with syrupy phosphoric acid and not with concentrated sulphuric acid because concentrated sulphuric acid is:

(1) more volatile 

(2) less stable

(3) a weaker acid

(4) an oxidising agent

Subtopic:  Group 17 - Preparation, Properties & Uses |
 71%
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HI reacts with HNO3 to form:

1. O2

2. N2O

3. HIO3

4. NO2+I2

Subtopic:  Group 17 - Preparation, Properties & Uses |
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Which of the following halogen oxides is ionic?

(1) I4O9

(2) I2O5

(3) BrO2

(4) ClO3

Subtopic:  Group 17 - Preparation, Properties & Uses |
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Among halogens maximum oxides are formed by:

(1) fluorine

(2) chlorine

(3) bromine

(4) iodine

Subtopic:  Group 17 - Preparation, Properties & Uses |
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Which is the true covalent oxide of iodine?

(1) I2O4

(2) I2O5

(3) I2O8

(4) I4O9

Subtopic:  Group 17 - Preparation, Properties & Uses |
 67%
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Cl2O is an anhydride of:

(1) HClO4

(2) HOCl

(3) Cl2O3

(4) HClO2

Subtopic:  Group 17 - Preparation, Properties & Uses |
 57%
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