The p -Block Elements

Given below are two statements.

           Statement I: The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases.

           Statement II: Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions.

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

Match List-I with List-II match the gas evolved during each reaction.

Choose  the correct answer from the options given below

Amongst the following, the number of oxide(s) which are paramagnetic in nature is Na₂O, KO₂, NO₂, N₂O, ClO₂, NO, SO₂, Cl₂O (Nearest Integer)

White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of

PCl₅ is well known, but NCl₅ is not. Because

(a) Nitrogen is less reactive than phosphorous            

(b) Nitrogen doesn't have d-orbitals in its valence shell.

(c) catenation tendency is weaker in nitrogen than phosphorous

 (d) size of phosphorous is larger than nitrogen

Which one of the following elemental forms is not present in the enamel of the teeth?

The most stable trihalide of nitrogen 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 :

Given below are the oxides :                                                                                                                        

Na₂O, As₂O₃, N₂O, NO and Cl₂O₇

Number of amphoteric oxides is :

11.4 The state of hybridisation of B in BH₄ is

(a) sp (b) sp² (c)sp³ (d) None