There are three main well known allotropes of phosphorous in which one form is interconvertable to other as X → 573 K Inert atmosphere Δ Y → High pressure Δ Z [X], [Y] and [Z] represent the

White P, red P, and black P respectively

Red P, white P and black P respectively

Black P, red P and white P respectively

Red P, black P and white P respectively

EASY

Earn 100

$P_{4}$ has which of the following structures?

50% studentsanswered this correctly

Important Questions on p-Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Which of the following is kept under water ?

HARD

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

The most reactive allotropic form of phosphorus is

HARD

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Heating white phosphorus with conc.

NaOH

solution gives mainly

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

The

P - P - P

bond angle in white phosphorus is

MEDIUM

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

Complete and balance the following chemical equations:

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

_____+_____.

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Concentrated

{HNO}_{3}

oxidise white phosphorus into which substance?

EASY

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 ?

EASY

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'

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:

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Thermodynamically least and most stable allotropic forms of phosphorus respectively are

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Which allotrope of phosphorus is most reactive?

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Which of the following phosphorus is the most reactive?

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

There are three main well known allotropes of phosphorous in which one form is interconvertable to other as

[X] \to_{\underset{\underset{atmosphere}{Inert}}{573 K}}^{Δ} [Y] \to_{High pressure}^{Δ} [Z]

[X], [Y] and [Z] represent the

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Safe matchsticks are manufactured by using which of the following compounds?

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 ?

MEDIUM

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.

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

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

EASY

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

The oxyacid of phosphorus in which phosphorus has the lowest oxidation state is :

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements>Phosphorus

Wrong statement regarding white phosphorus

(P_{4})

is:

P4 has which of the following structures?

Important Questions on p-Block Elements

Learn and Prepare for any exam you want !

$P_{4}$ has which of the following structures?