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.
From the following ores is iron extracted? I. Haematite ll. Bauxite III. Magnetite IV. Cassiterite
l and ll only
l and lll only
l, ll and lll only
l, ll, lll and lV
Correct answer is B
No explanation has been provided for this answer.
Glucose reduces Fehling's solution on warming to
copper (l) oxide
copper (ll) oxide
copper (l) chloride
copper (ll) hydroxide
Correct answer is A
No explanation has been provided for this answer.
Which of the following compounds reacts readily with sodium to liberate hydrogen?
CH3CH2CH3
CH3COOH
CH3 CH2CHO
CH3 CH(OH)CH3
Correct answer is B
No explanation has been provided for this answer.
drugs
margarine
paraffin wax
soapy detergents
Correct answer is B
This is called hydrogenation. It includes the manufacture of margarine from animal or vegetable fats and oils.
Ethene reacts with hydrogen in the presence of a finely divided nickel catalyst at a temperature of about 150°C. Ethane is produced.
CnH2n
CnH2n
CnH2n+2
CnH2n-2
Correct answer is D
No explanation has been provided for this answer.