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.
An element with atomic number twelve is likely to be
electrovalent with a velocity of 1
electrovalent with a valency of 2
covalent with a valency of 2
covalent with valency of 4
Correct answer is B
No explanation has been provided for this answer.
How much of magnesium is required to react with 260cm3 of 0.5 M HCl? [Mg = 24]
0.3g
1.5g
2.4g
3.0g
Correct answer is B
No explanation has been provided for this answer.
The number of atoms of chlorine present in 5.85g of NaCl is [Avogaro's Number = 6.02 x 1023]
6.02 x 1022
5.85 x 1023
6.02 x 1023
5.85 x 1024
Correct answer is A
The number of atoms of chloride present in 5.85g of NaCl is 5.85 x 6.0 x 1023
= 6.02 x 1022
HF + N2F2 → N2HF3
2HF + N2F2 → 2NHF2
2HF + N2F2 → N2H2F3
HF + 2N2F2 → N4HF2
Correct answer is B
No explanation has been provided for this answer.