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.
-99 kJ mol-
-198 kJ mol-
+198 kJ mol-
+683kJ mol-
Correct answer is B
2SO2 + O2 → 2SO3
2(-297) 2(-396)
-594 -792
Heat change = heat of product - heat of reactants = -792 - (-594) = -198kj mol-
H2S and NH3
SO2 and CuO
SO2 and NH3
H2S and CuO
Correct answer is C
No explanation has been provided for this answer.
What is the oxidation number of Z in K3ZCl6?
-3
+3
-6
+6
Correct answer is B
No explanation has been provided for this answer.
0.20
0.30
0.40
0.50
Correct answer is C
No of mole → (2.98)/(58.7) ..............0.1
2.0 .................x
∴ x = (0.2)/(2.98) x 58.7 x 0.40
acidic
basic
neutral
amphoteric
Correct answer is A
No explanation has been provided for this answer.