1
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as

A
Crystallization
B
Sublimation
C
Distillation
D
Chromatography
2
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II.

List I
(Reaction)
List II
(Reagents/Condition)
A. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 1 I. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 2
B. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 3 II. CrO$$_3$$
C. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 4 III. KMnO$$_4$$/KOH, $$\Delta$$
D. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 5 IV. (i) O$$_3$$
(ii) Zn-H$$_2$$O

Choose the correct answer from the options given below:

A
A-IV, B-I, C-III, D-II
B
A-III, B-I, C-II, D-IV
C
A-IV, B-I, C-II, D-III
D
A-I, B-IV, C-II, D-III
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

For the reaction $$2 \mathrm{~A} \rightleftharpoons \mathrm{B}+\mathrm{C}, \mathrm{K}_{\mathrm{c}}=4 \times 10^{-3}$$. At a given time, the composition of reaction mixture is: $$[A]=[B]=[C]=2 \times 10^{-3} \mathrm{M} \text {. }$$ Then, which of the following is correct?

A
Reaction is at equilibrium.
B
Reaction has a tendency to go in forward direction.
C
Reaction has a tendency to go in backward direction.
D
Reaction has gone to completion in forward direction.
4
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

The pair of lanthanoid ions which are diamagnetic is

A
$$\mathrm{Ce}^{4+}$$ and $$\mathrm{Yb}^{2+}$$
B
$$\mathrm{Ce}^{3+}$$ and $$\mathrm{Eu}^{2+}$$
C
$$\mathrm{Gd}^{3+}$$ and $$\mathrm{Eu}^{3+}$$
D
$$\mathrm{Pm}^{3+}$$ and $$\mathrm{Sm}^{3+}$$
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