Which of the following HY(hydra-acid of halogen) is the strongest acid, best reducing agent, is the least stable and is easily oxidised

(1) HF

(2) HCl

(3) HBr

(4) HI

Subtopic:  Group 17 - Preparation, Properties & Uses |
 80%
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The strength of halogen acids, HF, HCl, HBr, and HI varies in the order

1. HF>HCl>HBr>HI

2. HF>HBr>HI>HCl

3. HBr>HI>HCl>HF

4. HI>HBr>HCl>HF

Subtopic:  Group 17 - Preparation, Properties & Uses |
 74%
From NCERT
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Why does fluorine not produce oxyacids?

1. It is most electronegative

2. It is the most powerful oxidising agent

3. It has vacant d- orbitals

4. None of the above

Subtopic:  Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses |
 55%
From NCERT
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Which is correct order of basic strength

(A) OCl->ClO2->ClO3->ClO4-

(B) ClO4->ClO3->ClO2->ClO-

(C) ClO3->ClO4->ClO2->ClO-

(D) None of these

Subtopic:  Group 17 - Preparation, Properties & Uses |
 77%
From NCERT
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Which of the following does not form stable pentoxide

1. As

2. Sb

3. Bi

4. P

Subtopic:  Group 15 - Preparation, Properties & Uses |
 74%
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Which is the correct order order of decreasing boiling point of azeotropic mixtures HX-H2O

(1) HI,HBr,HF,HCl

(2) HI,HCl,HBr,HF

(3) HF,HCl,HBr,HI

(4) HCl,HF,HBr,HI

Subtopic:  Group 17 - Preparation, Properties & Uses |
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F2 reacts with dilute NaOH to give oxygen difluroide. The formula is

(1) F2O

(2) OF2

(3) F2O2

(4) F2O3

Subtopic:  Group 17 - Preparation, Properties & Uses |
 86%
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Which of the following oxyacids of chlorine is least tendency to get oxidise?

(1) HOCl

(2) HClO2

(3) HClO3

(4) HClO4

Subtopic:  Group 17 - Preparation, Properties & Uses |
 61%
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Which of the following is most basic

(1) F-

(2) Cl-

(3) Br-

(4) I-

Subtopic:  Group 17 - Preparation, Properties & Uses |
 65%
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Of the hydrides, H2OH2Seand H2Te, the one which has the smallest pKa value is

1. H2O

2. H2S

3. H2Se

4. H2Te

Subtopic:  Group 16 - Preparation, Properties & Uses |
 75%
From NCERT
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