14
MCQ (Single Correct Answer)
Covalent bond can undergo fission in two different ways. The correct representation involving a heterolytic fission of $\mathrm{CH}_3-\mathrm{Br}$ is
A
B
C
D
15
MCQ (Single Correct Answer)
The addition of HCl to an alkene proceeds in two steps. The first step is the attack of $\mathrm{H}^{+}$ion to
portion which can be shown as
A
B
C
D
All of these are possible
16
MCQ (Multiple Correct Answer)
Which of the following compounds contain all the carbon atoms in the same hybridisation state?
A
$\mathrm{H}-\mathrm{C} \equiv \mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{H}$
B
$\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_3$
C
$\mathrm{CH}_2=\mathrm{C}=\mathrm{CH}_2$
D
$\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_2$
17
MCQ (Multiple Correct Answer)
In which of the following representations given below spatial arrangement of group/atom different from that given in structure ' $A$ '?
A
B
C
D
18
MCQ (Multiple Correct Answer)
Electrophiles are electron seeking species. Which of the following groups contain only electrophiles?
A
$\mathrm{BF}_3, \mathrm{NH}_3, \mathrm{H}_2 \mathrm{O}$
B
$\mathrm{AlCl}_3, \mathrm{SO}_3, \mathrm{NO}_2^{+}$
C
$\mathrm{NO}_2^{+}, \mathrm{CH}_3^{+}, \mathrm{CH}_3-\mathrm{C}^{+}=\mathrm{O}$
D
$\mathrm{C}_2 \mathrm{H}_5^{-}, \dot{\mathrm{C}}_2 \mathrm{H}_5, \mathrm{C}_2 \mathrm{H}_5^{+}$