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

The correct decreasing order of negative electron gain enthalpy for $$\mathrm{C}, \mathrm{Ca}, \mathrm{Al}, \mathrm{F}$$ and $$\mathrm{O}$$ is

A
$$\mathrm{F}>\mathrm{O}>\mathrm{C}>\mathrm{Al}>\mathrm{Ca}$$
B
$$\mathrm{Ca}>\mathrm{Al}>\mathrm{O}>\mathrm{F}>\mathrm{C}$$
C
$$\mathrm{Al}>\mathrm{F}>\mathrm{Ca}>\mathrm{C}>\mathrm{O}$$
D
$$\mathrm{F}>\mathrm{C}>\mathrm{O}>\mathrm{Ca}>\mathrm{Al}$$
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

COMEDK 2023 Morning Shift Chemistry - Isomerism Question 8 English

I and II are

A
identical
B
a pair of conformers
C
a pair of geometrical isomers
D
a pair of optical isomers
3
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

$$\mathrm{Ti}^{2+}$$ is purple while $$\mathrm{Ti}^{4+}$$ is colourless because

A
$$\mathrm{Ti}^{2+}$$ has $$3 d^2$$ configuration
B
$$\mathrm{Ti}^{4+}$$ has $$3 d^2$$ configuration
C
$$\mathrm{Ti}^{2+}$$ is very small cation when compared to $$\mathrm{Ti}^{2+}$$ and hence, doesn't absorb any radiation
D
There is no crystal field effect in $$\mathrm{Ti}^{4+}$$
4
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

In Friedal-Crafts alkylation reaction of phenol with chloromethane, the product formed will be

A
$$p$$-cresol only
B
$$m$$-cresol only
C
mixture of $$o$$-and $$p$$-cresol
D
$$o$$-cresol only
EXAM MAP