Hydrocarbons · JEE Main previous year questions

Benzene and toluene form nearly ideal solutions. At $20^{\circ }\mathrm{C}$, the vapour pressure of benzene is $75\mathrm{torr}$ and that of toluene is $22\mathrm{torr}$. The partial vapour pressure of benzene at $20^{\circ }\mathrm{C}$ for a solution containing $78\mathrm{g}$ of benzene and $46\mathrm{g}$ of toluene in $\mathrm{torr}$ is

1. A.$50$
2. B.$25$
3. C.$53.5$
4. D.$37.5$

The compound formed on heating chlorobenzene with chloral in the presence concentrated sulphuric acid is

1. A.gammexene
2. B.hexachloroethane
3. C.Freon
4. D.DDT

Which of these will not react with acetylene ?

1. A.NaOH
2. B.ammoniacal $\mathrm{AgN}{\mathrm{O}}_3$
3. C.Na
4. D.HCl

What is the product when acetylene reacts with hypochlorous acid ?

1. A.$\mathrm{C}{\mathrm{H}}_3\mathrm{COCl}$
2. B.$\mathrm{ClC}{\mathrm{H}}_2\mathrm{CHO}$
3. C.$\mathrm{C}{\mathrm{l}}_2\mathrm{CHCHO}$
4. D.$\mathrm{ClCHCOOH}$

Acetylene does not react with :

1. A.$\mathrm{Na}$
2. B.ammoniacal $\mathrm{AgN}{\mathrm{O}}_3$
3. C.$\mathrm{HCl}$
4. D.$\mathrm{NaOH}$