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

Which of the following compounds undergo Aldol condensation followed by dehydration to give 3-phenylprop-2-en-1-al?

A
Benzaldehyde and Acetophenone
B
Two molecules of Benzaldehyde
C
Benzaldehyde and Acetone
D
Benzaldehyde and Ethanal
2
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The $$\Delta \mathrm{H}_{(\mathrm{f})}^{\mathrm{o}}$$ of $$\mathrm{NO}_2(\mathrm{~g})$$ and $$\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g})$$ are 16.0 and $$4.0 \mathrm{k} \mathrm{cal} \mathrm{mol}^{-1}$$ respectively. The heat of dimerisation of $$\mathrm{NO}_2$$ in $$\mathrm{k}$$ cal is :

A
$$-16$$ k cal
B
$$-8$$ k cal
C
$$-28$$ k cal
D
$$-14$$ k cal
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The bond dissociation enthalpy of the species in their correct order is:

A
$$\mathrm{O}_2^{2-}>\mathrm{O}_2>\mathrm{O}_2^{+}>\mathrm{O}_2^{-}$$
B
$$\mathrm{O}_2>\mathrm{O}_2^{+}>\mathrm{O}_2^{-}>\mathrm{O}_2^{2-}$$
C
$$\mathrm{O}_2^{+}>\mathrm{O}_2>\mathrm{O}_2^{-}>\mathrm{O}_2^{2-}$$
D
$$\mathrm{O}_2^{+}>\mathrm{O}_2>\mathrm{O}_2^{2-}>\mathrm{O}_2^{-}$$
4
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Identify the incorrect statement among the following.

A
Electrolytic conductance increases with increase in temperature
B
Conductivity does not depend on the viscosity of the solution
C
Conductivity depends on the size of the ions
D
Conductivity depends on the solvation of the ions
EXAM MAP