Fsc Part 2 Chemistry Online Test-Chapter 9 Aromatic Hydrocarbons

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Sr.#	Question	Answer
1	Aromatic compounds burns with sooty flame because.	A. They have high percentage of hydrogen B. The have a right structure C. The have high percentage of carbon D. The resist reaction with air
2	Which group when attached with benzene increases electron density of ring.	A. -COOH B. -NO C. -CHO D. -CH3
3	Amongst the following, the compound of that can be most readily sulphonated is	A. Toluene B. Benzene C. Nitro-benzene D. Chloro-benzene
4	m-choronitro benzene is prepared by	A. Nitration of chlorobenzene B. Nitration of Benzene C. Chlorination of Nitrobenzene D. Nitration of m-chlorobenzene
5	The number of possible isomers of xylene are	A. 2 B. 3 C. 4 D. 5
6	During Nitration of Benzene the active nitrating agent is	A. NO₃ B. NO₂⁺ C. NO₂ D. HNO₃
7	The aromatic ring of Benzene can be hydrogenated in the presenc eof.	A. Pt B. Rh C. Sunlight D. O3
8	The difference of actual and theoretical heat of hydrogenation of compound is called.	A. Lattice energy B. Resonance energy C. Ionization energy D. Enthalpy of formation
9	Chlorobenzene on nitration with conc. HNO3 and Conc. H2SO4 gives.	A. m -chloronitrobenzene B. o and p chloronitrobenzene C. o and m chloronitrobenzene D. mixture of O2 m and p chloronitrobenzene
10	The benzene molecule contains	A. three double bonds B. two double bonds C. one double bond D. delocalized pie-electron charge