Correct structure of $\mathrm{\gamma }$-methylcyclohexane carbaldehyde is

Important Questions on Aldehydes, Ketones and Carboxylic Acids

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 24 January 2023 Shift 1>Q 134

'$\mathrm{R}$' formed in the following sequence of reaction is:

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 29 January 2023 Shift 2>Q 141

The denticity of the ligand present in the Fehling's reagent is _____ .

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 30 January 2023 Shift 1>Q 143

A trisubstituted compound '$\mathrm{A}$', ${\mathrm{C}}_{10}{\mathrm{H}}_{12}{\mathrm{O}}_2$ gives neutral ${\mathrm{FeCl}}_3$ test positive. Treatment of compound '$\mathrm{A}$' with $\mathrm{NaOH}$ and ${\mathrm{CH}}_3\mathrm{Br}$ gives ${\mathrm{C}}_{11}{\mathrm{H}}_{14}{\mathrm{O}}_2$, with hydroiodic acid gives methyl iodide and with hot conc. $\mathrm{NaOH}$ gives a compound $\mathrm{B}$, ${\mathrm{C}}_{10}{\mathrm{H}}_{12}{\mathrm{O}}_2$. Compound '$\mathrm{A}$' also decolorises alkaline ${\mathrm{KMnO}}_4$. The number of $\pi$ bond/s  present in the compound '$\mathrm{A}$' is _____ .