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The molecular formula of phosphorus is:

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Important Questions on p-Block Elements

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

The

P - P - P

bond angle in white phosphorus is

HARD

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:

HARD

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Heating white phosphorus with conc.

NaOH

solution gives mainly

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

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

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

803 K ?

HARD

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

The most reactive allotropic form of phosphorus is

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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 of the following is kept under water ?

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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

Name the allotrope of phosphorous that exhibits chemiluminescence.

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

The product formed by the reaction of

{SOCl}_{2}

with white phosphorus is

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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

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

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

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Which of the following statements are true about the allotropes of phosphorous?

a. White phosphorous is unstable because of angle strain.

b. White phosphorous shows phosphorescence.

c. Red phosphorous has a polymeric structure.

d. The phossy jaw is caused by red phosphorous.

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Which of the following statements are correct?

HARD

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Could the strain in

P_{4}

molecule be reduced by using

{sp}^{3}

hybrid orbitals in bonding instead of pure

p -

orbitals?

HARD

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

White phosphorus on reaction with lime water gives calcium salt of an acid

X

, along with a gas

Y

. Which of the following statements is correct ?

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Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Among the following statements, choose incorrect statement about white phosphorus.

The molecular formula of phosphorus is:

Important Questions on p-Block Elements

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