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

Which one of the following statements is correct?

A
The order of stability of Carbanions is $$\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2^{-}<\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \mathrm{CH}^{-}<\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \mathrm{C}^{-}$$
B
In $$\mathrm{CH}_3{ }^{+}$$, Carbon carrying positive charge is $$\mathrm{sp}^3$$ hybridised.
C
In $$\mathrm{CH}_3^{-}$$, Carbon carrying negative charge is $$\mathrm{sp}^2$$ hybridised.
D
The order of stability of Carbocations is $$(\mathrm{C}_6 \mathrm{H}_5)_3 \mathrm{C}^{+}<(\mathrm{C}_6 \mathrm{H}_5)_2 \mathrm{CH}^{+}<\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2^{+}$$
2
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

In the given Redox equation, identify the stoichiometric coefficients $$\mathrm{w}, \mathrm{x}, \mathrm{y}$$ and $$\mathrm{z}$$.

$$\mathrm{ClO}_3^{-1}+\mathrm{w} \mathrm{Cl}^{-1}+\mathrm{xH}^{+} \rightarrow \mathrm{y} \mathrm{H}_2 \mathrm{O}+\mathrm{zCl}_2$$

A
$$ w=3 \quad x=6 \quad y=3 \quad z=2 $$
B
$$ w=5 \quad x=6 \quad y=3 \quad z=3 $$
C
$$ w=7 \quad x=6 \quad y=3 \quad z=4 $$
D
$$ w=6 \quad x=5 \quad y=2.5 \quad z=3 $$
3
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

In the following question, Assertion (A) is given followed by a statement of Reason (R). Choose the correct answer.

Assertion (A): $$\pi\left(2 p_x\right), \pi\left(2 p_y\right), \pi^*\left(2 p_x\right), \pi^*\left(2 p_y\right)$$ molecular orbitals have one nodal plane each.

Reason $$(\mathrm{R})$$ : All the molecular orbitals formed by the sideways overlapping have one nodal plane.

A
Both assertion and reason are true and reason is the correct explanation of the assertion.
B
Both assertion and reason are false
C
Assertion is true but reason is false
D
Both assertion and reason are true and reason is not the correct explanation of the assertion.
4
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Structures of 3 Monosaccharides are given below. Two of them are Anomers. Identify the two Anomers.

COMEDK 2023 Evening Shift Chemistry - Isomerism Question 4 English

A
II is the anomer of both I and II
B
I and II are Anomers.
C
II and III are Anomers.
D
I and III are Anomers
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