1
JEE Main 2026 (Online) 23rd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

$$ \text { Match List - I with List - II. } $$

List - I
Functional group (detection)
List - II
Change observed during detection
A. Unsaturation (Baeyer's test) I. Red colour appears
B. Alcoholic group (Ceric ammonium nitrate test) II. Silver mirror appears
C. Aldehyde group (Tollen's reagent) III. Violet colour appears
D. Phenolic group ( $\mathrm{FeCl}_3$ test) IV. Discharge of pink colour
A

A-IV, B-I, C-II, D-III

B

A-III, B-IV, C-I, D-II

C

A-III, B-IV, C-II, D-I

D

A-IV, B-III, C-II, D-I

2
JEE Main 2026 (Online) 23rd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

' $x$ ' is the product which is obtained from propanenitrile and stannous chloride in the presence of hydrochloric acid followed by hydrolysis. ' $y$ ' is the product which is obtained from the but-2-ene by the ozonolysis followed by hydrolysis. From the following, which product is not obtained when one mole of ' $x$ ' and one mole of ' $y$ ' react with each other in the presence of alkali followed by heating?

A

2-Methylpent-2-enal

B

2-Methylbut-2-enal

C

3-Methylbut-2-enal

D

Pent-2-enal

3
JEE Main 2026 (Online) 23rd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A cup of water at $5^{\circ} \mathrm{C}$ (system) is placed in a microwave oven and the oven is turned on for one minute during which the water begins to boil. Which of the following option is true?

A

$q=+v e, w=-v e, \Delta U=+v e$

B

$q=+v e, w=0, \Delta U=-v e$

C

$q=+v e, w=-v e, \Delta U=-v e$

D

$q=-v e, w=-v e, \Delta U=-v e$

4
JEE Main 2026 (Online) 23rd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given,

(A) $\mathrm{n}=5, \mathrm{~m}_1=-1$

(B) $\mathrm{n}=3, \mathrm{l}=2, \mathrm{~m}_1=-1, \mathrm{~m}_{\mathrm{s}}=+\frac{1}{2}$

The maximum number of electron(s) in an atom that can have the quantum numbers as given in (A) and (B) respectively are :

A

4 and 1

B

2 and 4

C

26 and 1

D

8 and 1

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