HBr and HI reduce sulphuric acid; HCl can reduce KMnO4 and HF reduces:

1. H2SO4

2. KMnO4

3. K2Cr2O7

4. none

Subtopic:  Group 17 - Preparation, Properties & Uses |
 67%
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The hydrogen fluoride is liquid, unlike the other hydrogen halides, because:

(1) fluorine is a smaller atom

(2) HF is the weakest acid

(3) HF molecules are associated due to hydrogen bonding

(4) F2 is highly reactive

Subtopic:  Group 17 - Preparation, Properties & Uses |
 89%
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The correct order of the thermal stability of hydrogen halide (H-X) is:

(1) HI > HBr > HCl > HF

(2) HF > HCl > HBr > HI

(3) HCl < HF > HBr < HI

(4) HI > HCl < HF > HBr

Subtopic:  Group 17 - Preparation, Properties & Uses |
 83%
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One can draw the map of a building on a glass plate by:

(1) HI

(2) HF

(3) HBr

(4) HCl

Subtopic:  Group 17 - Preparation, Properties & Uses |
 68%
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Which acid can combine with its own salt again?

(1) HF

(2) HBr

(3) HCl

(4) HI

Subtopic:  Group 17 - Preparation, Properties & Uses |
 55%
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HF present as impurity in gaseous F2 can be removed by passing over:

(1) P2O5

(2) NaF

(3) H2SO4

(4)_ CaCl2

Subtopic:  Group 17 - Preparation, Properties & Uses |
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Hydrofluoric acid is not preserved in glass bottles because:

(1) It reacts with the visible part of light

(2) It reacts with the sodium oxide of the glass composition

(3) It reacts with the aluminium oxide of the glass composition

(4) It reacts with the silicon dioxide of glass

Subtopic:  Group 17 - Preparation, Properties & Uses |
 66%
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Pure HF does not attack:

(1) Glass

(2) Fe

(3) SiO2

(4) Polythene

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