Match the following: a Pure nitrogen i Chlorine b Haber process i i Sulphuric acid c Contact process i i i Ammonia d Deacon’s process i v Sodium azide or Barium azide Which of the following is the correct option?

a - i v ; b - i i i ; c - i i ; d - i

a - i ; b - i i ; c - i i i ; d - i v

a - i i ; b - i v ; c - i ; d - i i i

a - i i i ; b - i v ; c - i i ; d - i

HARD

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What are the different allotropes of phosphorous?

Important Questions on The p-Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

Which among the group -15 elements does NOT exist as tetra atomic molecule?

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

In diamond, the hybridization of each carbon atom is

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

The element that does NOT exhibits allotropy is-

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

State why for the preparation of nitric acid, the complete apparatus is made up of glass.

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at

803 K ?

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

The product formed in the reaction of

S O C l_{2}

with white phosphorous is

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

White phosphorous

P_{4}

has the following characteristics

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

By the action of concentrated

H_{2} {SO}_{4}

, phosphorus changes to:

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

Heating white phosphorus with conc.

NaOH

solution gives mainly

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

What is the hybridization of carbon atoms in fullerene?

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

What is the type of salt formed when the reactants are heated at a suitable temperature for the preparation of nitric acid?

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

White phosphorus, when heated with conc.

NaOH

solution in an inert atmosphere of

{CO}_{2}

, forms phosphine and a sodium salt of oxoacid of phosphorus,

' X'

. The oxidation state of phosphorus in

' X'

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

Match the following:

$(a)$	Pure nitrogen	$(i)$	Chlorine
$(b)$	Haber process	$(i i)$	Sulphuric acid
$(c)$	Contact process	$(i i i)$	Ammonia
$(d)$	Deacon’s process	$(i v)$	Sodium azide or Barium azide

Which of the following is the correct option?

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

Complete the following reaction :

$C + conc . {HNO}_{3} \to$

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

Can

{PCl}_{5}

act as an oxidising as well as a reducing agent? Justify.

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

N_{2}

DOES NOT show property of catenation because,

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

White phosphorus on reaction with concentrated

N a O H

solution in an inert atmosphere of

C O_{2}

gives phosphine and compound

(X) . (X)

on acidification with

H C l

gives compound

(Y) .

The basicity of compound

(Y)

is:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

The product formed by the reaction of

{SOCl}_{2}

with white phosphorus is

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Phosphorus

The

P - P - P

bond angle in white phosphorus is

What are the different allotropes of phosphorous?

Important Questions on The p-Block Elements

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