Correct pair of compounds which gives bl...

Correct pair of compounds which gives blue colouration/precipitate and white precipitate, re- spectively, when their Lassaigne's test separately

`NH_(2)NH_(2).HCl` and `ClCH_(2)COOH`

`NH_(2)CSNH_(2)` and `PhCH_(2)Cl`

`NH_(2)CH_(2)COOH` and `NH_(2)CONH_(2)`

Text Solution

Verified by Experts

The correct Answer is:

`NH_(2)NH_(2).HCl` does not contain C and hence does not give blue colour in Lassaigne's test. `NH_(2)CSNH_(2)` contains both N and S and hence gives red colour in Lassaigne's test. `NH_(2)CONH_(2)` does not contain Cl and hence does not give while ppt. Thus, `C_(6)H_(5)NHMe` contains N and hence gives blue colour while `o-C_(6)H_(4)(Cl)COOH` contains Cl and thus gives white ppt. Lassaigne's test. Hence, option (d) is correct.

Topper's Solved these Questions

ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES TECHNIQUES
PRADEEP|Exercise Competition Focus (Jee (Main and Advanced)/Medical Entrance) II. Multiple Choice Questions (with one or more than one correct answers)|8 Videos
ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES TECHNIQUES
PRADEEP|Exercise Competition Focus (Jee (Main and Advanced)/Medical Entrance) III. Multiple Choice Questions (Comprehension)|12 Videos
ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES TECHNIQUES
PRADEEP|Exercise Analytical Questions and Problems with Answers/Solutions (Problems)|4 Videos
HYDROGEN
PRADEEP|Exercise COMPETITION FOCUS (Assertion-Reason Type Questions) Type 2|15 Videos
P-BLOCK ELEMENTS (NITROGEN FAMILY)
PRADEEP|Exercise Competition focus jee(main and advanced)/ medical entrance special) (VIII. Assertion-Reason Type Questions)|10 Videos

Correct pair of compounds which gives blue colouration/precipitate and white precipitate, re- spectively, when their Lassaigne's test separately

Text Solution

Topper's Solved these Questions

Similar Questions

PRADEEP-ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES TECHNIQUES-Competition Focus (Jee (Main and Advanced)/Medical Entrance) I. Multiple choice Questions (With One Correct Answer)