TNSET 2024 Paper 2 Chemical Sciences Question Paper (07-Mar-2025) Shift 1

Question 1

Which of the following reaction is a redox reaction?

Accepted Answer

$[Fe(CN)_6]^{4-} + [Mo(CN)_2]^{3-} ⇢ [Fe(CN)_6]^{3-} + [Mo(CN)_8]^{4-}$

Answer

$HNO_3 + 2H_2SO_4 ⇢ 2HSO_4^- + NO_2^+ + H_3O^+$

Answer

$SO_3 + H_2SO_4⇢  H_2S_2O_7$

Answer

$SbF_5 + 2HF⇢ H_2F^+ + SbF_6^-$

Question 2

Match the following: ReactionOrgano Metallic Catalyst1. $CH_2=C H_{2}+\frac{1}{2}  O_{2} \rightarrow C H_{3}CHO$i. $(Ph_3P)_3RhCl$2. $C H_{3}OH+CO \rightarrow C H_{3}COOH$ii. $Co_2(CO)_8$3. $C H_{2}=C H_{2}+2CO+2 H_{2}O \rightarrow C H_{3}C H_{2}CHO$iii. $[Rh(Co)_2I_2]^-$4.$C H_{2}=C H_{2}+ H_{2} \rightarrow C H_{3}-C H_{3}$iv. $[PdCl_4]^{2-}$Choose the correct answer from the following:

Accepted Answer

1-iv, 2-iii, 3-ii, 4-i

Answer

1-iii, 2-iv, 3-i, 4-ii

Answer

1-ii, 2-iii, 3-i, 4-iv

Answer

1-iv, 2-i, 3-ii, 4-iii

Question 3

The $^{19}F$ NMR spectrum of $SF_4$ consists of:

Accepted Answer

Two 1:2:1 triplets of equal intensity

Answer

One 1:2:1 triplets of different intensity

Answer

Two 1:2:1 doublets of equal intensity

Answer

Three 1:2:1 triplets of unequal intensity

Question 4

ESR spectrum of the complex ion $[Mo(CN)_8]^{3-}$ in solution consists of one line. If the sample is enriched with $^{13}C$ nine line(s) are observed. This shows I for $^{13}C$ is:

Accepted Answer

1/2

Answer

3/2

Answer

1

Answer

2

Question 5

In Diborane, the B...H...B bonds are:

Accepted Answer

3c-2e bonds

Answer

2c-3e bonds

Answer

2c-2e bonds

Answer

3c-3e bonds

Reaction	Organo Metallic Catalyst
1. \(CH_2=C H_{2}+\frac{1}{2} O_{2} \rightarrow C H_{3}CHO\)	i. $(Ph_3P)_3RhCl$
2. \(C H_{3}OH+CO \rightarrow C H_{3}COOH\)	ii. $Co_2(CO)_8$
3. \(C H_{2}=C H_{2}+2CO+2 H_{2}O \rightarrow C H_{3}C H_{2}CHO\)	iii. $[Rh(Co)_2I_2]^-$
4.\(C H_{2}=C H_{2}+ H_{2} \rightarrow C H_{3}-C H_{3}\)	iv. $[PdCl_4]^{2-}$