1
JEE Main 2024 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Identify correct statements from below:

A. The chromate ion is square planar.

B. Dichromates are generally prepared from chromates.

C. The green manganate ion is diamagnetic.

D. Dark green coloured $$\mathrm{K}_2 \mathrm{MnO}_4$$ disproportionates in a neutral or acidic medium to give permanganate.

E. With increasing oxidation number of transition metal, ionic character of the oxides decreases.

Choose the correct answer from the options given below:

A
B, D, E only
B
A, B, C only
C
A, D, E only
D
B, C, D only
2
JEE Main 2024 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The metals that are employed in the battery industries are

A. $$\mathrm{Fe}$$

B. $$\mathrm{Mn}$$

C. $$\mathrm{Ni}$$

D. $$\mathrm{Cr}$$

E. $$\mathrm{Cd}$$

Choose the correct answer from the options given below:

A
A, B, C, D and E
B
A, B, C and D only
C
B, D and E only
D
B, C and E only
3
JEE Main 2024 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

List - I (Technique) List - II (Application
(A) Distillation (I) Separation of glycerol from spent-lye
(B) Fractional distillation (II) Aniline - Water mixture
(C) Steam distillation (III) Separation of crude oil fractions
(D) Distillation under reduced pressure (IV) Chloroform - Aniline

Choose the correct answer from the options given below:

A
A-I, B-II, C-IV, D-III
B
A-II, B-III, C-I, D-IV
C
A-IV, B-I, C-II, D-III
D
A-IV, B-III, C-II, D-I
4
JEE Main 2024 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

'Adsorption' principle is used for which of the following purification method?

A
Chromatography
B
Sublimation
C
Distillation
D
Extraction
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