Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • In the Lassaigne’s test for nitrogen in an organic compound the Prussian blue colour is obtained due to the formation of:

12.37.    In the Lassaigne’s test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of:

               \; (a)\; N\! a_{4}\! \left [ F\! \! \, e(\! C\! N\! )_{6} \right ]                (b)\; F\! e_{4}\left [ F\! e(C\! N)_{6} \right ]_{3}           (c)\; F\! e_{2}\! \left [ F\! e(C\! N)_{6} \right ]           (d) \; F\! e_{3}\left [ F\! e(C\! N)_{6} \right ]_{4}

Answers (1)

best_answer

The Prussian blue colour is due to the formation of  Fe_4[Fe(CN)_6]_3.xH_{2}O in Lassaigne's test.

6CN^-+Fe^{2+}\rightarrow [Fe(CN)_6]^{4-}

3[Fe(CN)_6]^{4-}+4Fe^{3+}\rightarrow Fe_4[Fe(CN)_6]_3.xH_{2}O

So, the correct option is (b)

Posted by

manish

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE Date Sheet 2025 (Out) Live: Class 10, 12 board exam time table at cbse.gov.in; syllabus, sample papers
anam-khan

CBSE Class 12 board exam date sheet 2025 out; exams from February 15 to April 4
anam-khan

When will CBSE Board exam 2025 date sheet be released for Class 10, 12?

Latest Question