The basicity of the acids H3PO2, H3PO3, H3PO and H4P2O7 are respectively

(A) 1,2,3,7

(B) 2,3,4,7

(C) 1,2,3,4

(D) 1,2,3,5

Subtopic:  Group 15 - Preparation, Properties & Uses |
 77%
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The correct order of decreasing Lewis acid strength of trichlorides of group 15 elements is

(A) AsCl3>PCl3>BiCl3>SbCl3
(B)PCl3>AsCl3>SbCl3>BiCl3
(C) NCl3>PCl3>AsCl3>SbCl3
(D)SbCl3>BiCl3>PCl3>AsCl3

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Which of the following flourides has the least capacity as fluoride ion acceptor

(1)AsF5

(2) SbF5

(3) PF5

(4) None of these

Subtopic:  Group 15 - Preparation, Properties & Uses |
 60%
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The ionic character of H-X is highest in

(1) HBr

(2) HI

(3) HF

(4)HCl

Subtopic:  Group 17 - Preparation, Properties & Uses |
 66%
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The strongest acid is

(1) H3PO2 

(2) H3PO3 

(3) H4P2O7 

(4) H3PO4 

Subtopic:  Group 15 - Preparation, Properties & Uses |
 51%
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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%
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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%
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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%
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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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