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A hydrocarbon has molecular formula $C_8{H}_{12}$. In this hydrocarbon only one $H_2$ molecule can be added. On ozonolysis it gives symmetrical diketone. The hydrocarbon is
1.
2.
3.
4. All of these

How many halogen derivatives are possible for $C_2{H}_6$ ?
1. 2
2. 4
3. 6
4. 9

The order of melting point for isomeric pentanes is
1. n-pentane > Isopentane > Neopentane
2. Neopentane > Isopentane > n-pentane
3. Neopentane > n-pentane > Isopentane
4. Isopentane > n-pentane > Neopentane

$$\begin{gathered} C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{CH}}-C{H}_3+C{l}_2\stackrel{h\nu }{\to }A\left(mojar\right) \\ (1 mole) \end{gathered}$$
The compound ‘A’ is
1. $C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{CH}}-C{H}_2-Cl$
2. $C{H}_3-\underset{C{H}_3}{\overset{C{H}_3}{\underset{\left|}{\overset{\right|}{C}}}}-C{H}_3$
3. Both (1) and (2)
4. Neither (1) nor (2)

 + ${\left({\mathrm{CH}}_3\right)}_{2}CHC{H}_{2}Cl\underset{AlC{l}_3}{\overset{Anhydrous}{\to }}A\left(Major\right)$
the compound ‘A’ is
1.
2. 
3.
4. 

$C{H}_3-CH-C{H}_2-C{H}_3$ $\stackrel{{\left(C{H}_3\right)}_{3}C-\overline{O}{K}^{+}}{\to }$A (Major)
              l
             Br
the compound ‘A’ is
1. $C{H}_2=CH-C{H}_2-C{H}_3$
2. $C{H}_3-CH=CH-C{H}_3$
3. $C{H}_3$
$l$
$C{H}_2=C-C{H}_3$
4.  No Reaction

Compound ‘A’ and ‘B’ respectively
1. Both are Cis-butene-2
2. Cis-butene-2, Trans-butene-2
3. Both are Trans-butene-2
4. Trans-butene-2, Cis-butene-2

The absolute configuration of the following compound is

1. 2 S, 3R
2. 2 S, 3 S
3. 2 R, 3S
4. 2 R, 3R

The correct order of solvolysis in the following alkyl halide is
(1) $⊳-C{H}_{2}Cl>C{H}_2=CH-C{H}_{2}Cl>C{H}_{3}C{H}_{2}C{H}_{2}Cl$
(2) $C{H}_2=CH-C{H}_{2}Cl>⊳-C{H}_{2}Cl >C{H}_{3}C{H}_{2}C{H}_{2}Cl$
(3) $C{H}_{3}C{H}_{2}C{H}_{2}Cl>C{H}_3=CHC{H}_{2}Cl>⊳-C{H}_{2}Cl$
(4) $C{H}_2=CH-C{H}_{2}Cl>C{H}_{3}C{H}_{2}C{H}_{2}Cl>⊳-C{H}_{2}Cl$

Bottles containing $C_6{H}_{5}I$ and $C_6{H}_{5}C{H}_{2}I$ lost their original labels. They were labelled A and B for testing. A and B were separtely taken in test tube and boiled with NaOH solution. The end solution in each tube was made acidic with dilute $HN{O}_3$ and some $AgN{O}_3$ solution added. Solution B gave a yellow ppt. which one of the following statements is true for the experiment ?
(1) Addition of $HN{O}_3$ was unnecessary
(2) A was $C_6{H}_{5}I$
(3) A was $C_6{H}_{5}C{H}_{2}I$
(4) B was $C_6{H}_{5}I$

Replacement of ‘Cl’ of chlorobenzene to give phenol requires drastic conditions but chlorine of 2,4-dinitrochloro benzene is readily replaced because
1.$N{O}_2$ makes the ring electrons rich at ortho and para position
2. $N{O}_2$ withdraws electrons from meta position
3. $N{O}_2$ donates electrons at m-position
4. $N{O}_2$ withdraws electrons from ortho and para positions

Among the following bromides given below, the order of their reactivity in the $S_{N}1$ reaction is

1. III > II > I
2. II > III > I
3. III > I > II
4. II > I > III

Which haloarenes is most reactive towards electrophilic substitution reaction ?
(1)

(2) 

(3)

(4)

The ease of aromatic nucleophilic substitution among these compounds will be in the order as:
1. IV > I > II > III
2. IV > III > II > I
3. III > II > IV > I
4. I >II > III > IV

Arrange the following in the order of C-Br bond strength in a polar solvent:

(I)		(II)
(III)		(IV)

1. I < II < III < IV
2. III < IV < I < II
3. IV < III < II < I
4. II < I < III < IV