1
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements:

Statement I : In an organic compound, when inductive and electromeric effects operate in opposite directions, the inductive effect predominates.

Statement II : Hyperconjugation is observed in o-xylene.

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

A
Statement-I is true but Statement-II is false.
B
Statement-I is false but Statement-II is true.
C
Both Statement-I and Statement-II are true.
D
Both Statement-I and Statement-II are false.
2
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct option for a redox couple is:

A
Both are oxidised forms involving same element.
B
Both are reduced forms involving same element.
C
Both the reduced and oxidised forms involve same element.
D
Cathode and anode together.
3
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Ionisation enthalpies of early actinoids are lower than for early lanthanoids.

Reason (R) : Electrons are entering 5f orbitals in actinoids which experience greater shielding from nuclear charge.

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

A
(A) is true but (R) is false.
B
(A) is false but (R) is true.
C
Both (A) and (R) are true and (R) is the correct explanation of (A).
D
Both (A) and (R) are true but (R) is not the correct explanation of (A).
4
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

Consider the following reaction :-

$$2 \mathrm{H}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{H}_2 \mathrm{O}(\mathrm{g}) \Delta_{\mathrm{r}} \mathrm{H}^{\circ}=-483.64 \mathrm{~kJ} \text {. }$$

What is the enthalpy change for decomposition of one mole of water? (Choose the right option).

A
120.9 kJ
B
241.82 kJ
C
18 kJ
D
100 kJ
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