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.
When the end alkyl groups of ethyl ethanoate are interchanged, the compound formed is
propylmethanoate
ethylpropanoate
methyl ethanoate
methyl propanoate
Correct answer is D
No explanation has been provided for this answer.
An element Z contains 80% of 168Z and 20% of 188Z. Its relative atomic mass is
16.2
17.6
16.0
16.4
Correct answer is D
R.A.M of Z = 16(80100)+18(20100)
= 12.8+3.6
= 16.4
How many electrons will be found in the nucleus of an atom with mass number 23 and 17 neutrons?
none
6
7
8
Correct answer is A
Electrons are found in the orbit of the atom. They revolve around the nucleus. There's no electron found in the nucleus of an atom.
Al3+, Cl−
Hg+, SO2−4
Pb2+, Cl−
Ag+, SO2−4
Correct answer is C
No explanation has been provided for this answer.
The reaction 2H2S+SO2→3S+2H2O is
not a redox reaction because there is no oxidant in the reaction
not a redox reaction because there is no reductant in the reaction
a redox reaction in which H2S is the oxidant and SO2 is the reductant
a redox reaction in which SO2 is the oxidant and H2S is the reductant
Correct answer is D
No explanation has been provided for this answer.