Entry Test MCQ :: Aromatic Hydrocarbons

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11.

Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in

A.	The presence of Oxygen	B.	The presence of Hydrogen
C.	The absence of Oxygen	D.	The presence of excessive Oxygen

12.

By which method the molecular mass of benzene was determined as 78.108?

A.	Specific gravity method	B.	Vapour density method
C.	X-ray diffraction method	D.	Distillation methos

13.

How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum?

A.	Two	B.	Three
C.	Four	D.	Six

14.

Chlorination of toluene in the presence of sublight produces

A.	Benzyl chloride	B.	o - chlorotoluene
C.	p - chlorotoluene	D.	benzoic acid

15.

The heat of hydrogenation of cyclohexene is

A.	?239 kJ mol-1	B.	?208 kJ mol-1
C.	?119.5 kJ/mol	D.	?119.5 kcal/mol

16.

The resonance energy of benzene is

A.	150.5 kJ/mol	B.	250.5 kJ/mol
C.	150.5 Cal/mol	D.	250.5 Cal/mol

17.

What catalyst is employed when benzene is prepared from acetylene at 70?C?

A.	Cr2O3 + A?2O3 + SiO2	B.	Raney nickel
C.	Organo-nickel	D.	Ni 250 - 300?C

18.

Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from

A.	acetylene	B.	N-hexane
C.	Benzene sulphonic acid	D.	Sodium benzoate

19.

Which one of the following methods will not give benzene?

A.	Heating sod. Salt of Benzoic acid with soda lime	B.	Distilling phenol with Zn dust
C.	Chlorobenzene with NaOH at 360?C & 150atm.	D.	Hydrolysis of benzene sulphonic acid with super heated steam.

20.

Which is fused cyclic aromatic compound

A.	diphenyl amine	B.	diphenyl methane
C.	naphthalene	D.	biphenyl