Physics NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 3 PCB MCQ (Single Correct)

A translucent white waxy solid on heating in an inert atmosphere is converted to its allotropic form . Allotrope on reaction with very dilute aqueous liberates a highly poisonous gas having rotten fish smell, while excess of chlorine forms which hydrolyses to its another compound , identify compound .

A
White phosphorus
B
Phosphine
C
Red phosphorus
D
Phosphorus pentachloride

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The correct answer is:
A

The white waxy solid ( ) is white phosphorus.

When white phosphorus is heated in an inert atmosphere at . It changes to red phosphorus. is red phosphorus.

on heating with liberates phosphine gas which is poisonous gas with rotten fish smell,

White phosphorous burns with excess of to form phosphorus pentachloride .

Hydrolysis of gives phosphoric acid .

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