$N{H}_{4}Cl{O}_4+HN{O}_3\left(dilute\right)\to HCl{O}_4+\left[X\right]$

$\left[X\right]\stackrel{∆}{\to }Y\left(g\right)$

$\left[X\right]$ and $\left[Y\right]$ are respectively.

(a) $N{H}_{4}N{O}_3 and N_{2}O$       (c) $N{H}_{4}N{O}_2 and N_2$

(b) $HN{O}_4 and O_2$                (d) None

Which one of the following does not exist?

1. XeOF₄

2. NeF₂

3. XeF₂

4. XeF₆ 

Which of the following hydrides is most acidic

(1) H₂Te

(2) H₂Se

(3) H₂O

(4) H₂S

Which of the following oxide is most acidic

(1) Na₂O

(2) Al₂O₃

(3) P₂O₅

(4) SO₃

The least acidic oxide among the following is:

1. P₄O₆ 

2. P₄O₁₀ 

3. As₄O₆ 

4. As₄O₁₀ 

Moist ammonia gas is dried over

(1) P₂O₅

(2) Anhydrous CaCl₂

(3)Quick lime

(4)Conc. H₂SO₄

In the compounds of the type POX₃, the P atom multiple bond is of the type

(1) $p\mathrm{\pi }-\mathrm{p\pi }$

(2) $d\mathrm{\pi }-\mathrm{d\pi }$

(3) $p\mathrm{\pi }-\mathrm{d\pi }$

(4) None of these

Which of the following statement is not true for phosphorus?

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