10th class Chemistry chapter 12 online mcq test with answers for matric part 2 chemistry unit 12(Hydrocarbons)

Chemistry 10th Class English Medium Unit 12 Online Test

Sr. #	Questions	Answers Choice
1	How many percent of natural gas is consisted of methane.	60% 70% 80% 85%
2	Which hydrocarbon molecule would have no effect on the aqueous solution of bromine?	CH<sub>4</sub> C<sub>10</sub>H<sub>20</sub> C<sub>2</sub>H<sub>4</sub> C<sub>2</sub>H<sub>2</sub>
3	Chemical formula of chloroform.	CH<sub>3</sub>Cl CH<sub>2</sub>O<sub>2</sub> CHCl<sub>2</sub> CCl<sub>4</sub>
4	Dichloromethane reacts with halogens in the presence of diffused sun light and produces	Carbon tetrachloride Chloroform Chloromethane No reaction
5	Which compound do not produce in the halogenation of methane.	Chloroform Carbon tetrachloride Carbon black Chloromethane
6	Halogenation of methane on the presence of diffused sunlight takes place.	Only in one step Slowly in one step Freshly in two steps In a series of four steps
7	Amont the followign substitution reaction is characteristics of.	Alkanes Alkenes Alkynes None of these
8	Which hydrocarbon has no effect on an aqueous solution of bromine.	CH<sub>4</sub> C<sub>10</sub>H<sub>20</sub> C<sub>2</sub>H<sub>2</sub> C<sub>2</sub>H<sub>4</sub>
9	Marsh gas is mostly consisted of.	Butane Propane Ethane Methane
10	Which is the substitution reaction in the following?	Halogenation of alkenes Halogenation of alkynes Bromination of alkene Halogenation of alkanes
11	Incomplete combustion of alkanes produces.	Carbon dioxide only Carbon monoxide only Carbon monoxide and carbon black Carbon dioxide and carbon black
12	Ethylene is present is natural gas sometimes to the extent of .	10% 20% 30% 40%

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