1
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

On the basis of VSEPR theory, match the molecules listed in Column I with their shapes given in Column II.

No. Column I No. Column II
A $$\mathrm{ClF_3}$$ P Sea saw
B $$\mathrm{BrF_5}$$ Q Pentagonal bipyramidal
C $$\mathrm{SF_4}$$ R Square pyramidal
D $$\mathrm{IF_7}$$ S T-shaped

A
$$ \mathrm{A}=\mathrm{R} \quad \mathrm{B}=\mathrm{P} \quad \mathrm{C}=\mathrm{S} \quad \mathrm{D}=\mathrm{Q} $$
B
$$ \mathrm{A}=\mathrm{R} \quad \mathrm{B}=\mathrm{S} \quad \mathrm{C}=\mathrm{P} \quad \mathrm{D}=\mathrm{Q} $$
C
$$ \mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{R} \quad \mathrm{C}=\mathrm{P} \quad \mathrm{D}=\mathrm{Q} $$
D
$$ \mathrm{A}=\mathrm{Q} \quad \mathrm{B}=\mathrm{P} \quad \mathrm{C}=\mathrm{S} \quad \mathrm{D}=\mathrm{R} $$
2
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Match the compounds given in column I with the corresponding most stable Carbocations formed by each, as given in Column II, when they undergo acidic dehydration in presence of Conc. $$\mathrm{H}_2 \mathrm{SO}_4$$.

No. Column I No. Column II
A 2-Methylbutan-1-ol P $${(C{H_3})_2}\mathop C\limits^ + - CH{(C{H_3})_2}$$
B Butan-2-ol Q $$C{H_3} - C{H_2} - C{H_2} - \mathop C\limits^ + {H_2}$$
C 3, 3-Dimethylbutan-2-ol R $${(C{H_3})_2}\mathop C\limits^ + - C{H_2} - C{H_3}$$
D Butan-1-ol S $$C{H_3} - \mathop C\limits^ + H - C{H_2} - C{H_3}$$

A
$$ \mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{R} \quad \mathrm{C}=\mathrm{Q} \quad \mathrm{D}=\mathrm{P} $$
B
$$ \mathrm{A}=\mathrm{Q} \quad \mathrm{B}=\mathrm{R} \quad \mathrm{C}=\mathrm{S} \quad \mathrm{D}=\mathrm{P} $$
C
$$ \mathrm{A}=\mathrm{R} \quad \mathrm{B}=\mathrm{S} \quad \mathrm{C}=\mathrm{P} \quad \mathrm{D}=\mathrm{Q} $$
D
$$ \mathrm{A}=\mathrm{Q} \quad \mathrm{B}=\mathrm{S} \quad \mathrm{C}=\mathrm{P} \quad \mathrm{D}=\mathrm{R} $$
3
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify the pair of molecules, both of which have positive values of Dipole moment.

A
$$\mathrm{NF}_3$$ & $$\mathrm{CHCl}_3$$
B
$$\mathrm{BF}_3$$ & $$\mathrm{CHCl}_3$$
C
$$\mathrm{NF}_3$$ & $$\mathrm{CCl}_4$$
D
$$\mathrm{BF}_3$$ & $$\mathrm{CCl}_4$$
4
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Given below are 4 molecular species/ions. Identify the species/ion which exhibits diamagnetic nature.

$$[\mathrm{A}]=\mathrm{N}_2^{+} \quad[\mathrm{B}]=\mathrm{O}_2^{-} \quad[\mathrm{C}]=\mathrm{B}_2 \quad[\mathrm{D}]=\mathrm{C}_2$$

A
[C]
B
[A]
C
[D]
D
[B]
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