1
JEE Main 2026 (Online) 2nd April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Complete combustion of $X$ g of an organic compound gave $0.25$ g of $CO_2$ and $0.12$ g of $H_2O$. If the % of carbon is $25\%$ and of hydrogen is $4.89\%$, then $X = \underline{\phantom{xxx}} \times 10^{-3}$ g. (Nearest integer)

(Molar mass of C, H and O are 12, 1 and 16 g mol$^{-1}$ respectively.)

A

273

B

27

C

2730

D

227

2
JEE Main 2026 (Online) 2nd April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement (I) : 1,2,3-Trihydroxypropane can be separated from water by simple distillation.

Statement (II) : An azeotropic mixture cannot be separated by fractional distillation.

In the light of the above statements, choose the correct answer from the options given below :

A

Both Statement I and Statement II are true

B

Both Statement I and Statement II are false

C

Statement I is true but Statement II is false

D

Statement I is false but Statement II is true

3
JEE Main 2026 (Online) 2nd April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List - I with List - II.

List - I
Mixture of Compounds
List - II
Reagent used to distinguish
A Diethyl amine + Ethyl amine I Bromine water
B Acetaldehyde + Acetone II CHCl₃ + KOH, Δ
C Ethanol + Phenol III Neutral FeCl₃
D Benzoic acid + Cinnamic acid IV Ammoniacal silver nitrate

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

4
JEE Main 2026 (Online) 28th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A student has been given 0.314 g of an organic compound and asked to estimate Sulphur. During the experiment, the student has obtained 0.4813 g of barium sulphate. The percentage of sulphur present in the compound is _________. (Given Molar mass in g mol−1 S: 32, BaSO4: 233)

A

63.15%

B

21.05%

C

48.24%

D

42.10%

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