1
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

Choose the correct statements regarding population interactions between two species.

A. In both parasitism and commensalism, only one species benefits and the other species is harmed.

B. Both species benefit in mutualism.

C. Both species benefit in commensalism.

D. In parasitism, only one species benefits and the other species is harmed.

E. In amensalism, one species is harmed and the other is unaffected.

Choose the correct answer from the options given below:

A

B and E only

B

A and B only

C

B, D and E only

D

A and D only

2
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

Select the reagents that reduce nitriles to primary amines.

A. (i) $\mathrm{LiAlH}_4$; (ii) $\mathrm{H}_2 \mathrm{O}$

B. $\mathrm{Sn}+\mathrm{HCl}$

C. $\mathrm{H}_2 / \mathrm{Ni}$

D. $\mathrm{Na}(\mathrm{Hg}) / \mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$

E. $\mathrm{Br}_2 / \mathrm{aq} . \mathrm{NaOH}$

Choose the correct answer from the options given below.

A

B, D and E only

B

A, C and D only

C

A, D and E only

D

A, B and C only

3
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

$$ \text { Match List I with List II : } $$

List I
(Transition metal/compound/ complex)
List II
(Catalytic Role)
A. $$\mathrm{V}_2 \mathrm{O}_5$$ I. Preparation of ammonia from $\mathrm{N}_2 / \mathrm{H}_2$ mixture
B. Fe II. Polymerisation of alkynes
C. $\mathrm{PdCl}_2$ III. Preparation of $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{SO}_2$
D. Ni complex IV. Oxidation of ethyne to ethanal
Choose the correct answer from the options given below.
A

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

B

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

C

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

D

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

4
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

Consider the following reaction :

$$ \begin{aligned} & 2 \mathrm{~A}(\mathrm{~g})+\mathrm{B}(\mathrm{~g}) \rightarrow 2 \mathrm{D}(\mathrm{~g}) \\ & \Delta \mathrm{U}^{\ominus}=-10 \mathrm{~kJ} \mathrm{~mol}^{-1} \text { and } \Delta \mathrm{S}^{\ominus}=-44 \mathrm{JK}^{-1} \text { at } 298 \mathrm{~K} . \end{aligned} $$

Identify the correct option with $\Delta \mathrm{G}^{\ominus}$ for the reaction and spontaneity of the reaction at 298 K .

(Given : $\mathrm{R}=8.31 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$ )

A

$-1.635 \mathrm{~kJ} \mathrm{~mol}^{-1}$, spontaneous

B

$-0.63568 \mathrm{~kJ} \mathrm{~mol}^{-1}$, spontaneous

C

$+0.63568 \mathrm{~kJ} \mathrm{~mol}^{-1}$, non-spontaneous

D

$+1.635 \mathrm{~kJ} \mathrm{~mol}^{-1}$, non-spontaneous