COMEDK · Chemistry · 30. Biomolecules
Identify the 2 chemical tests which is not answered by Glucose having an open chain structure
[A] Reaction with Schiff's reagent and with Sodium bisulphite
[B] Reaction with \(\mathrm{HCN}\) and with \(\mathrm{HI}\)
[C] Reaction with \(\mathrm{HNO}_3\) and with Acetic anhydride
[D] Reaction with aqueous Bromine and with Hydroxylamine
- A [A]
- B [B]
- C [C]
- D [D]
Answer & Solution
Correct Answer
(A) [A]
Step-by-step Solution
Detailed explanation
Glucose predominantly exists in a cyclic hemiacetal form, so the free aldehyde concentration is extremely low. Due to this, glucose fails two characteristic aldehyde tests: It does not restore the pink colour of Schiff's reagent, and it does not form an addition compound with…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The standard emf of the cell \(\mathrm{Zn}\left|\mathrm{Zn}^{2+}\right|\left|\mathrm{Ag}^{+}\right| \mathrm{Ag}\) is \(1.56 \mathrm{~V}\). If the standard reduction potential of \(\mathrm{Ag}\) is \(0.8 \mathrm{~V}\), the standard oxidation potential of \(\mathrm{Zn}\) isCOMEDK 2014 Medium
- The Lanthanoid ion which would form coloured compounds is -------------.
Atomic numbers: \(\mathrm{Yb}=70, \quad \mathrm{Lu}=71, \mathrm{Pr}=59, \quad \mathrm{La}=57\)COMEDK 2024 Medium - Pure water is neutral becauseCOMEDK 2019 Easy
- Choose the correct statement:COMEDK 2025 Medium
- Aluminium displaces hydrogen from dilute \(\mathrm{HCl}\), whereas silver does not. The emf of a cell prepared by combining \(\mathrm{Al} / \mathrm{Al}^{3+}\) and \(\mathrm{Ag} / \mathrm{Ag}^{+}\) is \(2.46 \mathrm{~V}\). The reduction potential of silver electrode is \(+0.80 \mathrm{~V}\). The reduction potential of aluminium electrode isCOMEDK 2016 Hard
- Solubility product of a salt \(A B\) is \(1 \times 10^{-8}\) in a solution in which concentration of \(A\) is \(10^{-3} \mathrm{M}\). The salt will precipitate when the concentration of \(B\) becomes more thanCOMEDK 2013 Easy
More PYQs from COMEDK
- An electric bulb is rated at 220 V and 100 W . Power consumed by bulb when operated at 110 V will beCOMEDK 2024 Easy
- Hydrogen bond is strongest inCOMEDK 2018 Medium
- The circle \(x^2+y^2+3 x-y+2=0\) cuts an intercept on \(X\)-axis of lengthCOMEDK 2023 Easy
- Which of the following is an even function?COMEDK 2017 Easy
- If \(p \rightarrow(\sim q \vee r)\) is false, then the truth values of \(p, q\) and \(r\) areCOMEDK 2012 Easy
- A galvanometer of resistance \(50 \Omega\) is connected to a battery of 4 V along with a resistance of \(3950 \Omega\) in series. A full-scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 10 divisions, the resistance in series should be equal to:COMEDK 2025 Medium