COMEDK · Chemistry · 27. Aldehydes and Ketones
Which one of the following is the correct statement?
- A Acetone undergoes reaction in presence of Ba(OH)\(_2\) on heating to form 4–Methylpent–3–en–2–one
- B Acetophenone cannot be prepared on reacting Benzoyl chloride with Dimethyl cadmium in ether solvent
- C Acetophenone on reaction with I\(_2\) / Na\(_2\)CO\(_3\) (aq) does not undergo any reaction due to the presence of deactivating \(-\)COCH\(_3\) group
- D Acetone reacts with NH\(_2$$-\)NH\(_2\) / KOH in Glycol on heating to form the saturated hydrocarbon, Butane
Answer & Solution
Correct Answer
(A) Acetone undergoes reaction in presence of Ba(OH)\(_2\) on heating to form 4–Methylpent–3–en–2–one
Step-by-step Solution
Detailed explanation
Acetone (CH\(_3\)COCH\(_3\)) undergoes aldol condensation in the presence of a base like Ba(OH)\(_2\). Two molecules of acetone condense to form diacetone alcohol, which upon heating loses a water molecule to form an \(\alpha,\beta\)-unsaturated ketone. 2 CH\(_3\)COCH\(_3\)…
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
- \(\mathrm{N}_{2}+3 \mathrm{H}_{2} \rightleftharpoons 2 \mathrm{NH}_{3}+\) Heat. What is the effect of the increase of temperature on the equilibrium of the reaction?COMEDK 2017 Easy
- A transition elements with atomic number 24 will have its magnetic momentCOMEDK 2015 Easy
- The molar conductivities of \(\mathrm{NaOH}, \mathrm{NaCl}\) and \(\mathrm{BaCl}_{2}\) at infinite dilution are
\(2.481 \times 10^{-2} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}\)
\(1.265 \times 10^{-2} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}\) and
\(2.800 \times 10^{-2} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}\) respectively. The molar conductivity of \(\mathrm{Ba}(\mathrm{OH})_{2}\) at infinite dilution will beCOMEDK 2014 Hard - 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
- The formation of \(\mathrm{O}_{2}^{+}\left[\mathrm{PtF}_{6}\right]^{-}\)is basis for the formation of xenon fluorides. This is becauseCOMEDK 2018 Medium
- How many grams of potassium dichromate are required to oxidise 20.0 g of \(\mathrm{Fe}^{2+}\) in \(\mathrm{FeSO}_4\) to \(\mathrm{Fe}^{3+}\) if the reaction carried out in an acidic medium? Molar mass of \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) and \(\mathrm{FeSO}_4\) are 294 and 152 respectively.COMEDK 2024 Easy
More PYQs from COMEDK
- A vertical circular coil of radius \(0.1 \mathrm{~m}\) and having \(10\) turns carries a steady current. When the plane of the coil is normal to the magnetic meridian, a neutral point is observed at the centre of the coil. If \(B_{H}=0.314 \times 10^{-4} \mathrm{~T}\), the current in the coil isCOMEDK 2013 Medium
- A particle executes a simple harmonic motion of amplitude \(\mathrm{A}\). The distance from the mean position at which its kinetic energy is equal to its potential energy isCOMEDK 2024 Easy
- Young's modulus of the material of wires X and Y are in the ratio \(4: 1\) and the areas of cross sections of the wires X and Y are in the ratio 2:1. If the same amount of load is applied to both the wires, the ratio of elongation produced in the wires X and Y will be: (Assume length of the wires X and Y initially are the same)COMEDK 2025 Medium
- Which one of the following sets of monosaccharides forms sucrose?COMEDK 2021 Easy
- \(\int \frac{\left(x^{3}+3 x^{2}+3 x+1\right)}{(x+1)^{5}} d x=\)COMEDK 2016 Medium
- The circles \(a x^{2}+a y^{2}+2 g_{1} x+2 f_{1} y+c_{1}=0\) and \(b x^{2}+b y^{2}+2 g_{2} x+2 f_{2} y+c_{2}=0\) \((a \neq 0\) and \(b \neq 0)\) cut orthogonally ifCOMEDK 2016 Medium