The correct increasing order for the acid strength of nitrogen oxides is: 

1. N2NO N2ON2ON2O5

2. N2O NO N2ON2ON2O5

3. N2O N2ON2ON2ONO

4. NO N2O N2ON2ON2O5

Subtopic:  Group 15 - Preparation, Properties & Uses |
 70%
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In the compounds of the type POX3, the P atom multiple bond is of the type

(1) pπ-

(2) dπ-

(3) pπ-

(4) None of these

Subtopic:  Group 15 - Preparation, Properties & Uses |
 76%
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Which of the following statement is not true for phosphorus?

1. It is non-metal.
2. It exists as a tetrahedral molecular solid.
3. It is less reactive than nitrogen.
4. P-P bond is much weaker than  N≡N  bond.

Subtopic:  Group 15 - Preparation, Properties & Uses |
 71%
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Dipole moment is highest for

(1) NCl3

(2) NBr3

(3) NI3

(4) NF3

Subtopic:  Group 15 - Preparation, Properties & Uses |
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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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