On reaction with Cl_{2}, phosphorus forms two types of halides ‘A’ and ‘B’. Halide A is a yellowish-white powder, but halide ‘B’ is a colourless oily liquid. Identify A and B and write the formulas of their hydrolysis products.

Name: On reaction with Cl_{2}, phosphorus forms two types of halides ‘A’ and ‘B’. Halide A is a yellowish-white powder, but halide ‘B’ is a colourless oily liquid. Identify A and B and write the formulas of their hydrolysis products.
Uploaded: Sat, 2020-11-21 21:26
Description: On reaction with Cl_{2}, phosphorus forms two types of halides ‘A’ and ‘B’. Halide A is a yellowish-white powder, but halide ‘B’ is a colourless oily liquid. Identify A and B and write the formulas of their hydrolysis products.

#The P-block elements
#NCERT
#Exemplar Chemistry for Class 12
#Chemistry

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On reaction with $Cl_{2}$ , phosphorus forms two types of halides, ‘A’ and ‘B’. Halide A is a yellowish-white powder, but halide ‘B’ is a colourless, oily liquid. Identify A and B and write the formulas of their hydrolysis products.

Answers (1)

On passing dry chlorine over white phosphorus, first colourless, oily phosphorus trichloride is formed. $PCl_{3}$ again reacts with $Cl_{2}$ and forms yellowish-white powder like phosphorus pentachloride $PCl_{5}$

(i)	(ii)
$PCl_{5}$	$PCl_{3}$
Yellowish	Colourless Oily
White Powder	Liquid

$PCl_{3}$ reacts violently with water, forming phosphosphorous acid $\left ( H_{3}PO_{3} \right )$

$PCl_{3}+3H_{2}O\rightarrow H_{3}PO_{3}+3HCl$

$PCl_{5}$ undergoes violent hydrolysis

$PCl_{5}+H_{2}O\rightarrow POCl_{3}+2HCl$

$PCl_{5}+4H_{2}O\rightarrow H_{3}PO_{4}+5HCl$

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On reaction with , phosphorus forms two types of halides, ‘A’ and ‘B’. Halide A is a yellowish-white powder, but halide ‘B’ is a colourless, oily liquid. Identify A and B and write the formulas of their hydrolysis products.

Answers (1)

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On reaction with $Cl_{2}$ , phosphorus forms two types of halides, ‘A’ and ‘B’. Halide A is a yellowish-white powder, but halide ‘B’ is a colourless, oily liquid. Identify A and B and write the formulas of their hydrolysis products.