Day 181: JEE Mains Chemistry

5 questions. Try each one first, then open its answer.

Question 1
The p-Block Elements. Asked once: 2021 Paper 22 (same type asked 3 times) See all 3 of this type
55 $The number of halogen/(s) forming halic (V) acid is$
Question 2
The p-Block Elements. Asked once: 2021 Paper 13 (same type asked 3 times) See all 3 of this type
38 $B_{2}H_{6}$
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Question 3

Biomolecules. Asked once: 6 Apr 2026 S1 (same type asked 2 times) See all 2 of this type

{FeCl}_{3}

	List-I Amino acid		List-II Positive reaction/Test for functional group present in side chain of amino acid
(A)	Glutamine	(I)	Hinsberg's test
(B)	Lysine	(II)	Neutral ${FeCl}_{3}$ test
(C)	Tyrosine	(III)	Ceric ammonium nitrate test
(D)	Serine	(IV)	Hoffmann bromamide degradation

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Question 4
Hydrocarbons. Asked once: 23 Jan 2025 (same type asked 2 times) See all 2 of this type
39 $x$
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Chemical Thermodynamics. Asked once: 24 Jan 2026 S1 (same type asked 2 times) See all 2 of this type

\left( V_{f}>V_{i} \right)

	List-I (Isothermal process for ideal gas system)		List-II Work done $\left( V_{f}>V_{i} \right)$
(A)	Reversible expansion	(I)	$w = 0$
(B)	Free expansion	(II)	$w = - nRTln\frac{V_{f}}{V_{i}}$
(C)	Irreversible expansion	(III)	$w = - p_{ex}\left( V_{f} - V_{i} \right)$
(D)	Irreversible compression	(IV)	$w = - p_{ex}\left( V_{i} - V_{f} \right)$

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