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 general formula of an alkyl halide (where X represents the halide) is?
CnH2n 2X
CnH2n + 1X
CnH2n + 2X
CnH2nX
Correct answer is B
No explanation has been provided for this answer.
Which of the following substance is a mixture?
Granulated sugar
Sea-water
Sodium chloride
Iron fillings
Correct answer is B
No explanation has been provided for this answer.
Which of the following compounds is NOT formed by the action of chlorine on methane?
CH3CI
C2H5CI
CH2CI2
CHCI3
Correct answer is B
No explanation has been provided for this answer.
When ethanol is heated with excess concentrated sulphuric acid, the ethanol is?
oxidized to ethene
polymerized to polyethene
dehydrated to ethene
dehydrated to ethyne
Correct answer is C
No explanation has been provided for this answer.
What reaction takes place when palm-oil is added to potash and foam are observed?
Neutralization
Saponification
Esterification
Salting-out
Correct answer is B
The reaction of palm oil with potash is known as saponification reaction, palm oil serves as the organic acid(palmitic acid) while potash( conc. KOH) serves as the base leading to the formation of soap(the presence of bubbles indicate the formation of soap)