1
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following Coordination entities exhibits Facial and Meridional isomerism?

A
$$ \left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_3\left(\mathrm{NO}_2\right)_3\right] $$
B
$$ \left[\mathrm{Co}(\text { en })_2 \mathrm{Cl}_2\right]^{+} $$
C
$$ \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Br}_2\right] \mathrm{NO}_3 $$
D
$$ \left[\mathrm{Co}(\text { en })_3\right] \mathrm{Cl}_3 $$
2
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Arrange the following in the decreasing order of their Dipole moments.

a. Chlorobenzene

b. 1,2-Dichlorobenzene

c. 1,3-Dichlorobenzene

d. 1,4-Dichlorobenzene.

A
$$\mathrm{d>c>b>a}$$
B
$$\mathrm{c>d>b>a}$$
C
$$\mathrm{a>b>d>c}$$
D
$$\mathrm{d>c>a>d}$$
3
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The reactions taking place with $$\mathrm{2- Phenyl-2-bromopropane}$$ as the starting material is shown below. Identify [A] and [B] formed in the reaction.

$$ \mathrm{C}_6 \mathrm{H}_5-\mathrm{C}\left(\mathrm{CH}_3\right)_2^{-} \mathrm{Br} \xrightarrow[\Delta]{\text { KOH Alcoholic }}[\mathrm{A}] $$

$$ [\mathrm{A}]+\mathrm{HBr} \xrightarrow{\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CO})_2 \mathrm{O}\right.}[\mathrm{B}]$$

A
$$[\mathrm{A}]=2$$-Phenylpropene $$[\mathrm{B}]=2$$-Phenyl-1- bromopropane
B
$$[\mathrm{A}]=2$$ - Phenylpropan-2-ol $$[\mathrm{B}]=2$$-Phenyl-2-bromopropene
C
$$[\mathrm{A}]=2$$-Bromopropene $$[\mathrm{B}]=1$$-Bromopropane
D
$$ [A]=4 \text {-Hydroxyphenyl-2-bromopropane } \quad[B]=4 \text {-Hydroxyphenylpropene } $$
4
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The reaction taking place in a galvanic cell is as given

$$\mathrm{A}(\mathrm{s})+\mathrm{B}^{2+}\left(\mathbf{1} \mathbf{1} \mathbf{1 0} \mathbf{0}^{-\mathrm{M}} \mathbf{M}\right) \rightarrow \mathrm{B}_{(\mathrm{s})}+\mathrm{A}^{2+}(0.1 \mathrm{M}).$$

The emf of the cell is $$+2.651 \mathrm{~V}$$. If the standard emf of the cell is $$+2.71 \mathrm{~V}$$, what is the value of $$\mathrm{X}$$ ?

A
X = 6
B
X = 2
C
X = 3
D
X = 4
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