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.

The basicity of the acids H₃PO₂, H₃PO₃, H₃PO₄  and H₄P₂O₇ are respectively

(A) 1,2,3,7

(B) 2,3,4,7

(C) 1,2,3,4

(D) 1,2,3,5

Which of the following flourides has the least capacity as fluoride ion acceptor

(1)AsF₅

(2) SbF₅

(3) PF₅

(4) None of these

The ionic character of H-X is highest in

(1) HBr

(2) HI

(3) HF

(4)HCl

The strongest acid is

(1) H₃PO₂ 

(2) H₃PO₃ 

(3) H₄P₂O₇ 

(4) H₃PO₄ 

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

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

Which of the following does not form stable pentoxide

1. As

2. Sb

3. Bi

4. P

F₂ reacts with dilute NaOH to give oxygen difluroide. The formula is

(1) F₂O

(2) OF₂

(3) F₂O₂

(4) F₂O₃

Which of the following oxyacids of chlorine is least tendency to get oxidise?

(1) HOCl

(2) HClO₂

(3) HClO₃

(4) HClO₄