Top 150+ Solved Alkane MCQ Questions Answer
Q. The preparation of ethane by electrolysis of aqueous solution of potassium acetate is called as…….
a. Wurtz reaction
b. Sabatier-Senderen's reaction
c. Kolbe's synthesis
d. Grignard reaction
Q. As the number of carbon atoms in a chain increases the boiling point of alkanes……….
a. Increases
b. Decreases
c. Remains same
d. May increase or decrease
Q. In the fractional distillation of crude petroleum………..
a. Petrol condenses at the bottom of the column
b. The gases condense at the top of the column
c. High boiling constituents condense at the bottom of the column
d. High boiling constituents condense at the top of the column
Q. Which of the following is not an endothermic reaction…………
a. Dehydrogenation
b. Ethane to ethene
c. Combustion of propane
d. Change of chlorine molecule into chlorine atoms
Q. Gasoline is the name of ……………
a. Crude oil
b. The gaseous constituents of petroleum
c. The mixture of uncondensed gases produced in the distillation of crude oil
d. The mixture of the residue and gas oil obtained in the distillation of crude oil
Q. In the process of cracking……………
a. Organic compounds decompose into their constituent elements
b. Hydrocarbons decompose into carbon and hydrogen
c. High molecular weight organic compounds decompose to give low molecular weight organic compounds
d. Hydrocarbons yield alkyl radicals and hydrogen
Q. Dry distillation of sodium propanoate with sodalime gives …………..
a. Propane
b. Propene
c. Ethane
d. Ethene
Q. A mixture of propene and methane is obtained by the cracking of…………..
a. 1-butene
b. 2-butene
c. n-butane
d. Isobutane
Q. Which of the following fractions of petroleum refining contains kerosene ? (Boiling ranges in o C aregiven below)
a. 40 – 80
b. 80 - 200
c. 200 - 300
d. Above 300
Q. On mixing tetraethyl lead to gasoline available at petrol pumps…………..
a. Calorific value of the fuel increases
b. Odour diminishes
c. Less smoke is obtained on combustion
d. Antiknock property of fuel increases
Q. A liquid hydrocarbon can be converted to gaseous hydrocarbon by…………..
a. Cracking
b. Hydrolysis
c. Oxidation
d. Distillation under reduced pressure
Q. The tetrahedral nature of carbon was first given by………….
a. Kekule
b. Le Bell and Van't Hoff
c. Pauling
d. Armstrong and Bayer
Q. Formation of alkane by the action of Zn on alkyl halide is called
a. Frankland's reaction
b. Wurtz reaction
c. Cannizzaro reaction
d. Kolbe's reaction