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Which of the following allotropes of phosphorus are thermodynamically least and most stable?

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Important Questions on The p-Block Elements

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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:

HARD

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

The most reactive allotropic form of phosphorus is

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

Concentrated

{HNO}_{3}

oxidise white phosphorus into which substance?

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 ?

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

White phosphorous

P_{4}

has the following characteristics

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

The product obtained as a result of a reaction of nitrogen with

C a C_{2}

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

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

EASY

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

Name the allotrope of phosphorous that exhibits chemiluminescence.

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'

HARD

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

How does white phosphorus react with (i)

H_{2} {SO}_{4}

, (ii) sulphur, (iii)

Mg

, (iv)

Na

and (v)

{HNO}_{3}

EASY

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

In diamond, the hybridization of each carbon atom is

HARD

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

The nitrogen containing compound produced in the reaction of

H N O_{3}

with

P_{4} O_{10}

EASY

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

Identify the correct statement from the statements given below.

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

When copper is heated with conc.

H N O_{3}

it produces:

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

Which of the following is kept under water ?

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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

Which of the following allotropes of phosphorus are thermodynamically least and most stable?

Important Questions on The p-Block Elements

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