Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
The simplest branched-chain hydrocarbon is
ethane
ethene
propane
butane
Correct answer is D
The smallest branched alkane is isobutane. Notice that isobutane has the same molecular formula, C4H10, as n-butane but has a different structural formula.
The molecular formula of a common organic laboratory anaesthetic is
CHCl3
CHI3
CCl4
CHF3
Correct answer is A
No explanation has been provided for this answer.
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.