Which of the following statements about phosphorus is false?
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 NN bond.

Subtopic:  Group 15 - Preparation, Properties & Uses |
 65%
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The basicity of the acids H3PO2, H3PO3, H3PO and H4P2O7  are, respectively:

1. 1 , 2 , 3 , 7
2. 2 , 3 , 4 , 7
3. 1 , 2 , 3 , 4
4. 1 , 2 , 3 , 5

Subtopic:  Group 15 - Preparation, Properties & Uses |
 70%
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Which of the following flourides has the least capacity as fluoride ion acceptor

(A)AsF5

(B) SbF5

(C) PF5

(D) None of these

Subtopic:  Group 15 - Preparation, Properties & Uses |
 61%
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The ionic character of H-X is highest in

(A) HBr

(B) HI

(C) HF

(D)HCl

Subtopic:  Group 17 - Preparation, Properties & Uses |
 70%
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Which of the following acids is the strongest?
1. H3PO2 
2. H3PO3 
3. H4P2O7 
4. H3PO4 

Subtopic:  Group 15 - Preparation, Properties & Uses |
 53%
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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 |
 75%
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Flourine does not form oxyacids because

(1) It is most electronegative

(2) It is the most powerful oxidising agent

(3) It has vacant d- orbitals

(4) None of these

Subtopic:  Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses |
 61%
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The element that does not form pentoxide is:

1. As
2. Sb
3. Bi
4. P

Subtopic:  Group 15 - Preparation, Properties & Uses |
 70%
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F2 reacts with dilute NaOH to give oxygen difluroide of the formula

(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 having least tendency to get oxidized?

(1) HOCl

(2) HClO2

(3) HClO3

(4) HClO4

Subtopic:  Group 17 - Preparation, Properties & Uses |
 56%
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