JEE Mains · Chemistry · STD 12 - 10. Biomolecules
A sugar ' \(X\) ' dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after sometime. Sugar ' \(X\) ' is
- A Aldopentose
- B Aldotetrose
- C Oxalic\,acid
- D Ketotetrose
Answer & Solution
Correct Answer
(A) Aldopentose
Step-by-step Solution
Detailed explanation
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
- For the given reaction The total number of possible products formed by tertiary carbocation of \(A\) is \(.........\).
JEE Mains 2023 Hard - At \(298.2\, \mathrm{~K}\) the relationship between enthalpy of bond dissociation (in \(\mathrm{kJ} \,\mathrm{mol}^{-1}\) ) for hydrogen \(\left(\mathrm{E}_{\mathrm{H}}\right)\) and its isotope, deuterium \(\left(\mathrm{E}_{\mathrm{D}}\right)\), is best described by:JEE Mains 2021 Hard
- Consider the ground state of chromium atom \((\mathrm{Z}=24)\). How many electrons are with Azimuthal quantum number \(l=1\) and \(l=2\) respectively ?JEE Mains 2025 Easy
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Beryllium has less negative value of reduction potential compared to the other alkaline earth metals
Reason R : Beryllium has large hydration energy due to small size of but relatively large value of atomisation enthalpy.
In the light of the above statements, choose the most appropriate answer from the options given below.JEE Mains 2023 Medium - The orbital having two radial as well as two angular nodes isJEE Mains 2021 Easy
- \(224 \,mL\) of \(SO _{2( g )}\) at \(298 K\) and \(1\, atm\) is passed through \(100 \,mL\) of \(0.1 \,M \,NaOH\) solution. The non-volatile solute produced is dissolved in \(36\, g\) of water. The lowering of vapour pressure of solution (assuming the solution is dilute)
\(\left( P _{\left( H _{2} O \right)}=24\, mm \right.\) of \(\left. Hg \right)\) is \(x \times 10^{-2} mm\) of \(Hg\) the value of \(x\) is ...... .(Integer answer)JEE Mains 2021 Medium
More PYQs from JEE Mains
- The average translational kinetic energy of \({N}_{2}\) gas molecules at \(\ldots \ldots \ldots . .{ }^{\circ} {C}\) becomes equal to the \({K} . {E}\). of an electron accelerated from rest through a potential difference of \(0.1\) \(volt.\) \(\left(\right.\) Given \(\left.{k}_{{B}}=1.38 \times 10^{-23} \, {J} / {K}\right)\) (Fill the nearest integer).JEE Mains 2021 Medium
- Let \(a_{1}, a_{2} \ldots, a_{n}\) be a given \(A.P.\) whose common difference is an integer and \(S _{ n }= a _{1}+ a _{2}+\ldots+ a _{ n }\) If \(a_{1}=1, a_{n}=300\) and \(15 \leq n \leq 50,\) then the ordered pair \(\left( S _{ n -4}, a _{ n -4}\right)\) is equal toJEE Mains 2020 Hard
- An electron in a hydrogen atom revolves around its nucleus with a speed of \(6.76 \times 10^6\,ms ^{-1}\) in an orbit of radius \(0.52\,\mathring A\). The magnetic field produced at the nucleus of the hydrogen atom is \(......T\).JEE Mains 2023 Medium
- Decreasing order of reactivity towards electrophilie substitution for the following compounds is:
JEE Mains 2023 Medium - Let \(I\) be the identity matrix of order \(3 \times 3\) and for the matrix \(\mathrm{A}=\left[\begin{array}{ccc}\lambda & 2 & 3 \\ 4 & 5 & 6 \\ 7 & -1 & 2\end{array}\right],|\mathrm{A}|=-1\). Let B be the inverse of the matrix \(\operatorname{adj}\left(\mathrm{A} \operatorname{adj}\left(\mathrm{A}^2\right)\right)\). Then \(|(\lambda B+1)|\) is equal to _____JEE Mains 2025 Hard
- Given below are two statements :
Statement (I) : NaCl is added to the ice at \(0^{\circ} \mathrm{C}\), present in the ice cream box to prevent the melting of ice cream.
Statement (II) : On addition of NaCl to ice at \(0^{\circ} \mathrm{C}\), there is a depression in freezing point.
In the light of the above statements, choose the correct answer from the options given below :JEE Mains 2025 Easy