In which compound does phosphorous have the lowest oxidation state?

1. H₃PO₃ 

2. PCl₃ 

3. Ca₃P₂ 

4. POF₃

 A xenon fluoride that does not exist is:

1. XeF₄
2. XeF₂
3. XeF₃
4. XeF₆

(a) XeF₆ + 3H₂O →

(b) XeF₆ + H₂O $\to$

The products formed in the above reactions, respectively, are:

1. XeO₃ , XeOF₄
2. XeO₆ , XeOF₄
3. XeO₃, XeOF₆
4. XeO₆ , XeOF₆

Arrange the following compounds in increasing order of their acidity:
HF, HCl, HBr, HI 

1. HCl < HBr < HI<HF  

2. HF < HCl < HI< HBr

3. HF < HCl < HBr < HI

4. HF< HBr < HI< HCl 

XeF₄ is isostructural with :

1. ${\mathrm{ICl}}_4^{-}$       

2. ${\mathrm{IBr}}_2^{-}$                   

3. ${\mathrm{BrO}}_3^{-}$

4. ${\mathrm{ICl}}_3^{-}$

Which of the following is incorrect regarding noble gases?

1. The atomic radii corresponds to van der Waal’s radii.

2. They have the largest size in a period.

3. They are also called inert gases.

4. They combine to form molecules.

In solid-state, PCl₅ exists as: 

Match the items in Columns I and II and mark the correct option.

Codes:

Given below are two statements: