Top 150+ Solved Alkane MCQ Questions Answer
Q. Petroleum consists mainly of…………
a. Aliphatic hydrocarbons
b. Aromatic hydrocarbons
c. Aliphatic alcohols
d. None of these
Q. Petroleum ether can be used as……….
a. Solvent for fat, oil, varnish and rubber
b. As a fuel
c. Both (a) and (b)
d. None of these
Q. Which of the following are produced from coaltar………..
a. Synthetic dyes
b. Drugs
c. Perfumes
d. All the three
Q. In the preparation of alkanes; a concentrated aqueous solution of sodium or potassium salts ofsaturated carboxylic acid are subjected to………
a. Hydrolysis
b. Oxidation
c. Hydrogenation
d. Electrolysis
Q. Halogenation of alkanes is an example of………..
a. Electrophilic substitution
b. Nucleophilic substitution
c. Free-radical substitution
d. Oxidation
Q. Propionic acid is subjected to reduction with hydroiodic acid in the presence of a little P, the product formed is…………
a. Ethane
b. Propane
c. Butane
d. None of these
Q. When ethyl iodide and propyl iodide react with Na in the presence of ether, they form………
a. One alkane
b. Two alkanes
c. Four alkanes
d. Three alkanes
Q. The alkane that yields two isomeric monobromo derivatives is……………
a. Neopentane
b. Ethane
c. Methane
d. Propane
Q. When petroleum is heated the vapours contain mainly………….
a. Kerosene
b. Petroleum ether
c. Diesel
d. Machine oil
Q. Iso-octane is mixed to the petrol………….
a. To precipitate inorganic substances
b. To prevent freezing of petrol
c. To increase boiling point of petrol
d. As an antiknock
Q. Cyclohexane, a hydrocarbon floats on water because…………
a. It is immiscible with water
b. Its density is low as compared to water
c. It is non-polar substance
d. It is immiscible and lighter than water