Hydrocarbons · JEE Main previous year questions

Match List - I with List - II $$\begin{array}{llll}& \text{List - I}& & \text{List - II}\\ & \text{(process)}& & \text{(catalyst)}\\ \text{(a)}& \text{Deacon’s process}& \text{(i)}& \text{ZSM-5}\\ \text{(b)}& \text{Contact process}& \text{(ii)}& \mathrm{CuC}{\mathrm{l}}_2\\ \text{(c)}& \text{Cracking of hydrocarbons}& \text{(iii)}& \text{Particles ’Ni’}\\ \text{(d)}& \text{Hydrogenation of vegetable oils}& \text{(iv)}& {\mathrm{V}}_2{\mathrm{O}}_5\end{array}$$ Choose the most appropriate answer from the options given below :

1. A.(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
2. B.(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
3. C.(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
4. D.(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

1. A.
2. B.
3. C.
4. D.

1. A.(a) $\to$ (ii), (b) $\to$ (iv), (c) $\to$ (i), (d) $\to$ (iii)
2. B.(a) $\to$ (iii), (b) $\to$ (iv), (c) $\to$ (i), (d) $\to$ (ii)
3. C.(a) $\to$ (iii), (b) $\to$ (i), (c) $\to$ (iv), (d) $\to$ (ii)
4. D.(a) $\to$ (ii), (b) $\to$ (i), (c) $\to$ (iv), (d) $\to$ (iii)

The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is :

1. A.$C{H}_{3}COCl/AlC{l}_3$, $B{r}_2/AlB{r}_3$, $HN{O}_3/H_{2}S{O}_4$, $Zn/HCl$
2. B.$C{H}_{3}COCl/AlC{l}_3$, $Zn-Hg/HCl$, $B{r}_2/AlB{r}_3$, $HN{O}_3/H_{2}S{O}_4$
3. C.$B{r}_2/AlB{r}_3$, $C{H}_{3}COCl/AlC{l}_3$, $HN{O}_3/H_{2}S{O}_4$, $Zn/HCl$
4. D.$HN{O}_3/H_{2}S{O}_4$, $B{r}_2/AlC{l}_3$, $C{H}_{3}COCl/AlC{l}_3$, $Zn-Hg/HCl$

1. A.
2. B.
3. C.
4. D.

The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is : | Item-I | Item-II | | :--- | :--- | | (I) Benzene | (P) $\mathrm{HCl}$ and $\mathrm{SnC}{\mathrm{l}}_2$, ${\mathrm{H}}_3{\mathrm{O}}^{+}$ | | (II) Benzonitrile | (Q) ${\mathrm{H}}_2$, $\mathrm{Pd}$-$\mathrm{BaS}{\mathrm{O}}_4$, S and quinoline | | (III) Benzoyl Chloride | (R) $\mathrm{CO}$, $\mathrm{HCl}$ and $\mathrm{AlC}{\mathrm{l}}_3$ |

1. A.(I) - (R), (II) - (P) and (III) - (Q)
2. B.(I) - (P), (II) - (Q) and (III) - (R)
3. C.(I) - (Q), (II) - (R) and (III) - (P)
4. D.(I) - (R), (II) - (Q) and (III) - (P)

1. A.
2. B.
3. C.
4. D.

The reaction of ${\mathrm{H}}_3{\mathrm{N}}_3{\mathrm{B}}_3\mathrm{C}{\mathrm{l}}_3$ (A) with $\mathrm{LiB}{\mathrm{H}}_4$ in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to ${\mathrm{H}}_3{\mathrm{N}}_3{\mathrm{B}}_3(\mathrm{Me}{)}_3$. Compounds (B) and (C) respectively, are :

1. A.Borazine and MeBr
2. B.Diborane and MeMgBr
3. C.Boron nitride and MeBr
4. D.Borazine and MeMgBr

1. A.
2. B.
3. C.
4. D.

25 g of an unknown hydrocarbon upon burning produces 88 g of ${\text{CO}}_2$ and 9 g of ${\text{H}}_2\text{O}$. This unknown hydrocarbon contains :

1. A.18 g of carbon and 7 g of hydrogen
2. B.20 g of carbon and 5 g of hydrogen
3. C.22 g of carbon and 3 g of hydrogen
4. D.24 g of carbon and 1 g of hydrogen

At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL of ${\mathrm{O}}_2$ for complete combustion, and 40 mL of $\mathrm{C}{\mathrm{O}}_2$ is formed. The formula of the hydrocarbon is :

1. A.${\mathrm{C}}_4{\mathrm{H}}_7\mathrm{Cl}$
2. B.${\mathrm{C}}_4{\mathrm{H}}_6$
3. C.${\mathrm{C}}_4{\mathrm{H}}_8$
4. D.${\mathrm{C}}_4{\mathrm{H}}_{10}$

Which one of the following alkenes when treated with HCl yields majorly an anti Markovnikov product?

1. A.$\mathrm{Cl}-\mathrm{CH}=\mathrm{C}{\mathrm{H}}_2$
2. B.${\mathrm{F}}_3\mathrm{C}-\mathrm{CH}=\mathrm{C}{\mathrm{H}}_2$
3. C.$\mathrm{C}{\mathrm{H}}_3\mathrm{O}-\mathrm{CH}=\mathrm{C}{\mathrm{H}}_2$
4. D.${\mathrm{H}}_2\mathrm{N}-\mathrm{CH}=\mathrm{C}{\mathrm{H}}_2$

Which of the following compounds will most readily be dehydrated to give alkene under acidic condition ?

1. A.1- Pentanol
2. B.4-Hydroxypentan - 2-one
3. C.3-Hydroxypentan - 2-one
4. D.2-Hydroxycyclopentanone

When 9.65 ampere current was passed for 1.0 hour into nitrobenzene in acidic medium, the amount of p-aminophenol produced is :

1. A.9.81 g
2. B.10.9 g
3. C.98.1 g
4. D.109.0 g

The trans-alkenes are formed by the reduction of alkynes with

1. A.$\text{Sn}-\text{HCl}$
2. B.${\text{H}}_2-\text{Pd/C},{\text{BaSO}}_4$
3. C.${\text{NaBH}}_4$
4. D.${\text{Na/liq. NH}}_3$

1. A.
2. B.
3. C.
4. D.

At $300\mathrm{K}$ and $1\mathrm{atm}$, $15\mathrm{mL}$ of a gaseous hydrocarbon requires $375\mathrm{mL}$ air containing $20\%$ ${\mathrm{O}}_2$ by volume for complete combustion. After combustion the gases occupy $345\mathrm{mL}$. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:

1. A.${\mathrm{C}}_3{\mathrm{H}}_8$
2. B.${\mathrm{C}}_4{\mathrm{H}}_8$
3. C.${\mathrm{C}}_4{\mathrm{H}}_{10}$
4. D.${\mathrm{C}}_3{\mathrm{H}}_6$

1. A.
2. B.
3. C.
4. D.

In the following sequence of reactions: $$\mathrm{Toluene}\stackrel{\mathrm{KMn}{\mathrm{O}}_4}{\to }\mathrm{A}\stackrel{\mathrm{SOC}{\mathrm{l}}_2}{\to }\mathrm{B}\underset{\mathrm{BaS}{\mathrm{O}}_4}{\overset{{\mathrm{H}}_2/Pd}{\to }}\mathrm{C},$$ The product C is

1. A.${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}{\mathrm{H}}_3$
2. B.${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}{\mathrm{H}}_2\mathrm{OH}$
3. C.${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}$
4. D.${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COOH}$

1. A.
2. B.
3. C.
4. D.

1. A.(iv) > (i) > (ii) > (iii)
2. B.(ii) > (iii) > (i) > (iv)
3. C.(iii) > (i) > (iv) > (ii)
4. D.(i) > (ii) > (iii) > (iv)

Fluorobenzene (${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{F}$) can be synthesized in the laboratory

1. A.by heating phenol with HF and KF
2. B.from aniline by diazotisation followed by heating the diazonium salt with $\mathrm{HB}{\mathrm{F}}_4$
3. C.by direct fluorination of benzene with ${\mathrm{F}}_2$ gas
4. D.by reacting bromobenzene with NaF solution

1. A.
2. B.
3. C.
4. D.

Acid catalyzed hydration of alkenes except ethene leads to the formation of

1. A.primary alcohol
2. B.secondary or tertiary alcohol
3. C.mixture of primary and secondary alcohols
4. D.mixture of secondary and tertiary alcohols