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The most reactive allotropic form of phosphorus is

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Important Questions on p-Block Elements

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Chemistry>Inorganic Chemistry>p-Block Elements>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:

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Explain with chemical equation - What happen when white phosphorous is heated at

473 K

and very high pressure?

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Name the allotrope of phosphorous that exhibits chemiluminescence.

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Complete and balance the following chemical equations:

P_{4} + NaOH + H_{2} O \to_{Inert atm .}^{heat}

_____+_____.

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

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

803 K ?

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Concentrated

{HNO}_{3}

oxidise white phosphorus into which substance?

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Write main differences between the properties of white phosphorus and red phosphorus.

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

How does white phosphorus react with (i)

H_{2} {SO}_{4}

, (ii) sulphur, (iii)

Mg

, (iv)

Na

and (v)

{HNO}_{3}

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Which of the following is kept under water ?

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Heating white phosphorus with conc.

NaOH

solution gives mainly

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Chemistry>Inorganic Chemistry>p-Block Elements>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'

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

The product formed by the reaction of

{SOCl}_{2}

with white phosphorus is

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

The

P - P - P

bond angle in white phosphorus is

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

What is the substance bones contain which makes them glow in the dark?

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Which among the following phosphorus is most reactive?

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Which of the following oxoacids is obtained by reaction of white phosphorous with alkali followed by reaction with a non-oxidising acid?

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

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

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

The reaction of

P_{4}

with

X

leads selectively to

P_{4} O_{6}

. The

X

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

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$A$ is an allotrope of phosphorus that changes to other allotropes $B$ and $C$ under the given conditions. Among the following statements, which statement is correct?

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Each of the following is true about white and red phosphorus except that the

The most reactive allotropic form of phosphorus is

Important Questions on p-Block Elements

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