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	Alkynes are also called.	Olefine Ethene Paraffins Acetylenes
2	Boiling point of alcohol in centigrade is.	68 78 118 128
3	Dehalogenation of Tetrahalides takes place in the presence of .	K Mg Na Zn dust
4	Dehydrohalogenation of vicinal-dihalides take place in the presence of.	NaOH KOH NaCl None of these
5	How trace amount of acetylene present in the coat gas.	0.06% 0.07% 0.08% 0.09%
6	The end product of oxidation of acetylene is.	Propen glycol Ethan glycol Glyoxal Oxalic acid
7	Ethyne is oxidized by alkaline KMnO₄ then ....... hydroxyl group add to the triple bond.	Two Three Four Five
8	General formula of alkynes is:	C<sub>n</sub>H<sub>n</sub> C<sub>n</sub>H<sub>2n</sub> C<sub>n</sub>H<sub>2n+2</sub> C<sub>n</sub>H<sub>2n-2</sub>
9	Oxidation of Ethene with KMnO₄ produces.	Oxalic acid Glyoxal Ethene Glycol Propene glycol
10	Ethylene glycol can be prepared with the reaction of KMnO₄ and _____	CH = CH CH<sub>3</sub> - CH<sub>3</sub> CH<sub>3</sub>CH<sub>2</sub>CH<sub>3</sub> CH<sub>2</sub>= CH<sub>3</sub>
11	The order or reactivity of hydrogen halides with alkenes is.	HI/Br HBr > HI HCl > HBr HBr>HCl
12	____________ use for ripening of fruits.	Ethene Ethane Ethyne Propane