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.
carbon-14
phosphorus-32
cobalt-60
iodine-131
Correct answer is C
No explanation has been provided for this answer.
How many atoms are present in 6.0g of magnesium? [Mg = 24, N.A = 6.02 x 10 \(^{23}\)mol]
1.20 x 10\(^{22}\)
2.4 x 10\(^{22}\)
1.51 x 10\(^{22}\)
3.02 x 10\(^{22}\)
Correct answer is C
No explanation has been provided for this answer.
0.40 moldm\(^{-3}\)
0.50 moldm\(^{-3}\)
0.05 moldm\(^{-3}\)
0.30 moldm\(^{-3}\)
Correct answer is B
No explanation has been provided for this answer.
Zn
Ca
Al
Pb
Correct answer is A
No explanation has been provided for this answer.
1-methyl pentane
3-methylbutane
2-methylbutane
1-dimethyl propane
Correct answer is C
The longest carbon chain is butane, with one substituent attached at carbon number 2
therefore the compound is named 2-methyl butane