Which of the following hydrocarbons is mainly used as fuel?
Methylene
Ethylene
Methane
Ethyne
Correct answer is C
No explanation has been provided for this answer.
alkene
alkanal
alkyl
alkanone
Correct answer is A
Alkenes react in the cold with pure liquid bromine, or with a solution of bromine in an organic solvent like tetrachloromethane. The double bond breaks, and a bromine atom becomes attached to each carbon. The bromine loses its original red-brown colour to give a colourless liquid.
Alkynes also react with bromine, decolorising it though not as immediate as alkenes.
A compound commonly used for sterilization and preservation of specimens and food is
ethanol
benzene
ether
ammonia
Correct answer is A
No explanation has been provided for this answer.
Lucas reagent is used to test for?
alkanes
alkanoic acids
alkanols
amines
Correct answer is C
Lucas' reagent is a solution of anhydrous zinc chloride in concentrated hydrochloric acid. This solution is used to classify alcohols.
Which of the following class of compounds can exist as dipolar ions in solution?
Alkanoic acid
Fatty acids
Dialkanoic acids
Amino acids
Correct answer is D
No explanation has been provided for this answer.