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	Benzene is formed by the polymerization of.	Alkene Alkane Acetylene Methane.
2	Dehydration means removal of.	Water Halogen Hydrogen All above.
3	Some orchids attracts bees for pollination by producing.	alkanes almenes alkynes all the above.
4	In dry cleaning, which chemical is used.	Chloroform Carbon tetachloride Ecetaldehyde Ethanol
5	In shoe polished, which chemical is used.	Ethanol Methanol Carbon black Formaldehyde
6	Which gas creates suffocation and causes death?	CO CO<sub>2</sub> SO<sub>3</sub> SO<sub>2</sub>
7	Which one is the formula of chloromethane.	CH<sub>2</sub>Cl<sub>2</sub> CCl<sub>4</sub> CH<sub></sub>Cl<sub>3</sub> CH<sub>3</sub>Cl
8	Hydrogenation of alkenes and alkynes takes place at room temperature in the presence of.	Ni Pt Pd Both a and b
9	Which is present 85% in natural gas?	Ethane Propane Methane Butane
10	Alkanes are least reactive compounds because they are.	Saturated hydrocarbons. Unsaturated hydrocarbons. Both a and b None of the above.
11	Molecular formula of butyne is .	C<sub>4 </sub>H<sub>6</sub> C<sub>3</sub>H<sub>4</sub> C<sub>4</sub>H<sub>7</sub> C<sub>4</sub>H<sub>8</sub>
12	Chloroform is used for	Anesthesia Fever Link Toys