EASYNIELIT University(Govt. of India Institution) B.Tech/ M.Tech
ApplyLast Date to Apply : 15th September | Campuses in Ropar, Agartala, Aizawl, Ajmer, Aurangabad, Calicut, Imphal, Itanagar, Kohima, Gorakhpur, Patna & Srinagar
Search Colleges, Exams, Schools & more
Tests for Carbohydrates - Practice Questions & MCQ
Edited By admin | Updated on Sep 18, 2023 18:35 AM | #JEE Main
Quick Facts
-
19 Questions around this concept.
Solve by difficulty
Sugar which does not give reddish brown precipitate with Fehling's reagent is :
Concepts Covered - 1
Test for Carbohydrates
Molisch's Test
A drop of alcoholic solution of -Naphthol is added in 2ml of carbohydrate solution and 1ml of conc.H2SO4 is added carefully along the side of the tube. The formation of violet ring at the junction of 2-liquids shows the presence of carbohydrate.
Molisch’s test is a general test for all carbohydrates. In this test, carbohydrates when reacted with conc. H2SO4 get dehydrated to form furfural and its derivatives. When monosaccharide are treated with conc. H2SO4 or conc. HCl, -OH group of sugar are removed in the form of water and furfural is formed from pentose sugar and hydroxymethyl furfural is formed from hexose sugar. These products react with sulphonated α- naphthol to give a purple (violet-red) coloured complex.
Study it with Videos
Test for Carbohydrates"Stay in the loop. Receive exam news, study resources, and expert advice!"
Get Answer to all your questions
JEE Main Articles
B.Tech/B.Arch Admissions OPEN
Amity University, Noida B.Tech Admissions 2024
ApplyAsia's Only University with the Highest US & UK Accreditation
ITM SLS Baroda University B.Tech Admissions 2024
ApplyApproved by UGC, PCI, & COA. Best Innovative Private Institute in Gujarat. 600+ Recruiters, 3000+ Students Placed, 1500+ Industrial Internship Opportunities, 250+ International Internships.
Plastindia International University B.Tech Admissions 2024
ApplyInternational Learning Opportunities | UGC Approved | State-of-the-Art Laboratories
Joy University B.Tech 2024
ApplyOutstanding faculty of Eminence from IIT, BITS, IIM, IIIT NIT, NID and faculty from foreign universities | Merit & sports based scholarship
ICFAI University Hyderabad B.Tech Admissions 2024
ApplyMerit Scholarships | NAAC A+ Accredited | Top Recruiters : E&Y, CYENT, Nvidia, CISCO, Genpact, Amazon & many more
News and Notifications
September 13, 2024 - 04:35 PM IST
September 03, 2024 - 07:24 PM IST
August 12, 2024 - 11:27 AM IST
July 10, 2024 - 07:26 PM IST
June 20, 2024 - 12:07 PM IST
June 16, 2024 - 03:31 PM IST
May 02, 2024 - 10:31 AM IST
Download Careers360 App's
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile
300M+
Students
36,000+
Colleges
550+
Exams
1500+
E-Books
16000+
Certifications
We Appeared in
Back to top