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.
Which of the following mixtures would result in a solution of pH greater than 7?
25.00 cm3 of 0.05 M H2SO4 and 25.00cm3 of 0.50 M Na2CO3
25.00 cm3 of 0.05 M H2SO4 and 25.00 cm3 of 0.10 M NaHCO3
25.00 cm3 of 0.11 MH2SO4 and 25.00cm3 0. 10 M NaOH
25.00cm3 of 0.11 MH2 SO4 and 50.00 cm3 of 0.05 M NaOH
25.00cm3 of 0.25 M H2SO4 and 50.00cm3 of 0.20 M NaOH
Correct answer is A
No explanation has been provided for this answer.
H2SO4 + Al(OH)2 \(\to\) 2H2O + AlSO4
3H2SO4 + 2Al(OH)3 \(\to\) 6H2O + Al2(SO4)3
3H2SO4 + 2AlH \(\to\) 6H2O + Al(SO4)3
3H2 SO4 + 2Al(OH)3 \(\to\) Al(SO4)3
H2SO4 + Al(OH)3 \(\to\) H2O + Al2(SO4)3
Correct answer is B
No explanation has been provided for this answer.
The ratio of the number of molecules in 2g of hydrogen to that in 16g of oxygen is
2:1
1:1
1:2
1:4
1:8
Correct answer is A
No explanation has been provided for this answer.
Naphthalene when heated melts at 354 K (81 oC). At this temperature the molecules of naphthalene
decompose into smaller molecules
change their shape
are oxidized by atmospheric oxygen
contract
become mobile as the inter molecular forces are broken
Correct answer is E
No explanation has been provided for this answer.
1 and 2
2 and 3
3 and 4
1, 2, and 3
2, 3, and 5
Correct answer is B
No explanation has been provided for this answer.