The p -Block Elements

Which pair oxides in acidic in nature?

Match List – I and List – II

Choose the correct answer from the options given below:

The correct statement about B₂H₆ is:

Copper reduces $N{O}_3^{-}$ into NO and NO₂ depending upon the concentration of HNO₃ in solution. (Assuming fixed $\left[C{u}^{2+}\right]and{P}_{NO}=P_{N{O}_2}$ ), the HNO₃ concentration at which the thermodynamic tendency for reduction of $N{O}_3^{-}into$ NO and NO₂by copper is same is 10^x M. The value of 2x is……. (rounded-off to the nearest integer).

$[Given,E_{C{u}^{2+}/Cu}^0=0.34V,E_{N{O}_3^{-}/NO}^0=0.96V,E_{N{O}_3^{-}/N{O}_2}^0=0.79Vandat298K,\frac{RT}{F}\left(2.303\right)=0.059]$

The correct order of bond dissociation enthalpy of halogens is

Given below are two statements:

Statement I : α and β forms of sulphur can change reversibly between themselves with slow heating or slow cooling.

Statement II : At room temperature the stable crystalline form of sulphur is monoclinic sulphur.

In the light of the above statements, choose the correct answer from the options given below

Which one of the following is an example of disproportionation reaction?

The oxide which contains an odd electron at the nitrogen atom is

Identify the correct statement from B₂H₆ from those given below :

(A) In B₂H₆, all B-H bonds are equivalent

(B) In B₂H₆, there are four 3-centre 2- electron bonds

(C) B₂H₆ is a Lewis acid

(D) B₂H₆ can be synthesized from both BF₃ and NaBH₄.

(E) B₂H₆ is planar molecule.

Choose the most appropriate answer from the options given below :

The highest industrial consumption of molecular hydrogen is to produce compounds of element :