The respective oxidation states of P in H₄P₂O₅, H₄P₂O₆, and H₄P₂O₇ are: 

1.	+3, +5, and +4	2.	+5, +3, and +4
3.	+5, +4, and +3	4.	+3, +4, and +5

Which of the following statements is false? 

Which of the following is the correct electronic configuration of the element belonging to Group 15 and Period 3 of the periodic table?
1. \(\mathrm{1 s^2 2 s^2 2 p^4} \)
2. \(\mathrm{1 s^2 2 s^2 2 p^3} \)
3. \(\mathrm{1 s^2 2 s^2 2 p^6 3 s^2 3 p^2} \)
4. \(\mathrm{1 s^2 2 s^2 2 p^6 3 s^2 3 p^3}\)

A solid (A) reacts with strong aqueous NaOH, liberating a foul smelling gas (B), which spontaneously burns in the air, giving smoky rings. A and B are, respectively:

1. P₄ (red) and PH₃ 

2. P₄ (white) and PH₃

3. S₈ and H₂S

4. P₄ (white) and H₂S

Which of the following gases is the easiest to liquefy?

Which of the following orders is incorrect for the given properties of halogens?

Which of the following compounds is not an acidic salt?

1. NaH₂PO₂

2. NaH₂PO₃

3. Na₂H₂S₂O₇

4. NaH₂PO₄

Hydrogen peroxide can be generated by the hydrolysis of

1. ${\mathrm{HNO}}_3$

2. ${\mathrm{H}}_2{\mathrm{P}}_2\mathrm{O}$

3. ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_8$

4. ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_6$