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

$$t$$-butyl chloride preferably undergo hydrolysis by

A
$$\mathrm{S}_{\mathrm{N}} 1$$ mechanism
B
$$\mathrm{S}_{\mathrm{N}} 2$$ mechanism
C
any of (a) and (b)
D
None of the above
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of these represents the correct order of decreasing bond order?

A
$$\mathrm{C}_2^{2-}>\mathrm{O}_2^{2+}>\mathrm{O}_2^{-}>\mathrm{He}_2^{2+}$$
B
$$\mathrm{O}_2^{-}>\mathrm{O}_2^{+}>\mathrm{He}_2^{+}>\mathrm{C}_2^{2-}$$
C
$$\mathrm{He}_2^{+}>\mathrm{O}_2^{-}>\mathrm{C}_2^{2-}>\mathrm{O}_2^{+}$$
D
$$\mathrm{He}_2^{+}>\mathrm{O}_2^{2-}>\mathrm{O}_2^{+}>\mathrm{O}_2^{-}$$
3
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

In a $$0.2 \mathrm{~M}$$ aqueous solution, lactic acid is $$6.9 \%$$ dissociated. The value of dissociation constant is

A
$$1.2 \times 10^{-4}$$
B
$$9.5 \times 10^{-4}$$
C
$$6.5 \times 10^{-4}$$
D
$$3.6 \times 10^{-2}$$
4
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Pick up the correct statement.

A
Dipole moment of ammonia is due to orbital dipole and resultant diapole in same direction.
B
$$\mathrm{O}_2, \mathrm{H}_2$$ shown bond diapole due to polarisation.
C
Dipole moment is scalar quantity.
D
In $$\mathrm{BF}_3$$ bond dicopoles are zero but dipole moment is higher.
EXAM MAP