

Given reactions:
The compound (A) undergoes these reactions:
\[ \text{H}_2, \, \text{Pt} \rightarrow \text{Saturated compound} \] \[ \text{Hot alk. KMnO}_4 \rightarrow \text{Carboxylation of the methyl group} \] \[ \text{H}^+, \, \text{H}_2\text{O} \rightarrow \text{Carboxylic acid formation} \]
Let's consider the structure of compound (A). The first reaction with hydrogen (\( \text{H}_2 \)) and platinum (\( \text{Pt} \)) suggests that the compound contains a double bond or an unsaturation. Hydrogenation would reduce the unsaturation to a saturated structure. The second reaction with hot alkaline KMnO₄ is a strong oxidizing reaction that cleaves the methyl group (\( -\text{CH}_3 \)) in methylbenzene (toluene) and oxidizes it to a carboxyl group (\( -\text{COOH} \)), forming benzoic acid. The final acidic hydrolysis ensures the formation of carboxylic acid as the final product.
Conclusion: Compound (A) is likely to be toluene (methylbenzene), and after the reactions, the product will be benzoic acid.
Therefore, compound (A) corresponds to: Option 1 (Toluene), and the final product is benzoic acid.





Consider the following reaction of benzene. the percentage of oxygen is _______ %. (Nearest integer) 
A substance 'X' (1.5 g) dissolved in 150 g of a solvent 'Y' (molar mass = 300 g mol$^{-1}$) led to an elevation of the boiling point by 0.5 K. The relative lowering in the vapour pressure of the solvent 'Y' is $____________ \(\times 10^{-2}\). (nearest integer)
[Given : $K_{b}$ of the solvent = 5.0 K kg mol$^{-1}$]
Assume the solution to be dilute and no association or dissociation of X takes place in solution.
Inductance of a coil with \(10^4\) turns is \(10\,\text{mH}\) and it is connected to a DC source of \(10\,\text{V}\) with internal resistance \(10\,\Omega\). The energy density in the inductor when the current reaches \( \left(\frac{1}{e}\right) \) of its maximum value is \[ \alpha \pi \times \frac{1}{e^2}\ \text{J m}^{-3}. \] The value of \( \alpha \) is _________.
\[ (\mu_0 = 4\pi \times 10^{-7}\ \text{TmA}^{-1}) \]
A small block of mass \(m\) slides down from the top of a frictionless inclined surface, while the inclined plane is moving towards left with constant acceleration \(a_0\). The angle between the inclined plane and ground is \(\theta\) and its base length is \(L\). Assuming that initially the small block is at the top of the inclined plane, the time it takes to reach the lowest point of the inclined plane is _______. 