The p-Block Elements – Chemistry | NEET Online Mock Test

Which of the following can not be prepared by direct reaction of NH₃ with B₂H₆?

1. (BN)_x
2. B₃N₃H₆
3. BH₃.NH₃
4. [B(NH₃)₃H]₂₊

Maximum number of atoms present in same plane in diborane is

When diborane and ammonia react in ratio 1 : 2 at higher temparature then it gives

Order of thermal stability of hydride of carbon is

1. CH₄ < SiH₄ < GeH₄ < SnH₄ < PbH4₄
2.  PbH₄ < SiH₄ < GeH₄ < SnH₄ < CH₄
3. CH₄ > SiH₄ > GeH₄ > SnH₄ > PbH₄
4. GeH₄ > SnH₄ > SiH₄ > PbH₄ > CH₄

Linear silicones are formed by following reaction

1. The hydrolysis of ethyl chlorosilane followed by polymerisation
2. The acid hydrolysis of dimethyl silane followed by polymerisation
3. The hydrolysis of dimethyl dichlorosilane followed by polymerisation
4. The hydrolysis of trimethyl chlorosilane followed by polymerisation

Si₂O₇⁶- anion is obtained when

1. No oxygen of a SiO₄^4- tetrahedron is shared with another SiO₄ tetrahedron
2. One oxygen atom of a SiO₄^4- tetrahedron is shared with another SiO₄^1- tetrahedron
3. Two oxygen atoms of a SiO₄^4- tetrahedron are shared with another SiO₄^1- tetrahedron
4. Three or all four oxygen atoms of a tetrahedron are shared with other SiO₄^4- tetrahedron

Select the compound that can make boric acid solution strongly acidic when added to the solution of boric acid

Select the following anion that is present in the chain structure of silicates

1. (SiO₃^2-)_n
2. Si₂O₇^6-
3. SiO₄^4-
4. (Si₂O₅^2-)_n

The one that is not hydrolysed is

1. CCl₄
2. SiCl₄
3. GeCl₄
4. SnCl₄

Select from the following oxides that is basic

1. B₂O₃
2. Al₂O₃
3. Ga₂O₃
4. In₂O₃

Find the number of tetrahedral boron atoms present in the structure of borax

The silicates containing (Si₂O₇)_6- units are called

Reaction of diborane with Ammonia gives initially

1. B₂H₆ . NH₃
2. (BN)_x
3. B₂H₆ . 3NH₃
4. [BH₂(NH₃)₂]⁺ [BH₄^-]

Select from the following that has highest Lewis acid strength

1. Bl₃
2. BBr₃
3. BF₃
4. BCl₃

When formic acid is heated with concentrated H₂SO4 the gas evolved contains

1. CO₂
2. CO
3. A mixture of CO and CO₂
4. A mixture of SO₂ and CO₂

Which of the following can show maximum covalency six ?

B₂O₃ can be prepared from

1. Ca₂B₆O₁₁.5H₂O
2. Na₂B₄O₇.10H₂O
3. H₃BO₃
4. All of the above

When ethyl alcohol reacts with orthoboric acid which of the following compound is formed?

1. (C₂H₅)₃BO₃
2. C₂H₅H₂BO₃
3. (C₂H₅)₂HBO₃
4. All of the above

Choose incorrect option

1. SnCl₂ acts as a reducing agent
2. PbO₂ is called litharge
3. Carborundum is a covalent solid
4. SiCl₄ on hydrolysis gives silicic acid

Which of the following is weakest Lewis acid ?

1. BF₃
2. BCl₃
3. BBr₃
4. BI₃

Which of the following is the formula of ortho silicate?

1. ZrSiO₄
2. Mg₂SiO₄
3. Zn₂SiO₄
4. All of the above

A banana bond in diborane involves

Which of the following is incorrect?

In the reaction BF, + LIAIH → →X + LIF + AIF3 The formula of 'X' is

1. B₂H₆
2. B₂O₃
3. B₃N₃H₆
4. B₂H₆

Which is the most stable among the following hydridos?

1. CH₄
2. SlH₄
3. GeH₄
4. PbH₄

Choose correct statement:

The number of boron atoms having sp₂ hybridization in borax unit is

LiAIH₄ can react with BCI₃ to produce

1. B₂H₆
2. LiBO₂
3. B₂O₃
4. H₃BO₃

SiO₄^4- units are found to be present in

The product obtained in the reaction of diborane with excess of ammonia under strong heating condition is

1. B₂H₆ . NH₃
2. B₂H₆ . 2NH₃
3. (BN)_x
4. Borazine

The number of 2e - 2c bonds in B₂H₆ is :

Borax in its crystal possesses

In Group 14 the tendency to show +2 oxidation state increases in the order of:

1. Sn < Ge < Pb
2. Ge < Sn <Pb
3. Pb < Ge < Sn
4. Pb < Sn < Ge