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 increase in the pressure exerted on gas at a constant temperature results in
a decrease in the number of effective collisions
a decrease in volume
an increase in the average intermolecular distance
an increase in volume
Correct answer is B
No explanation has been provided for this answer.
49.19 cm 3
48.87 cm 3
48.55 cm 3
48.23 cm 3
Correct answer is D
General Gas Equation:
\(\frac{P_1 V_1}{T_1}\) = \(\frac{P_2 V_2}{T_2}\)
where P\(_1\) = 765 - 5 = 760mmhg
\(V_2 = \frac{P_1 V_1 T_2}{P_2 T_1}\)
\(V_2 = \frac{760 * 50 * 273}{ 760 * 283}\) → 48.23cm\(^3\)
How many atoms are present in 6.0g of magnesium?
[Mg = 24, NA = 6.02 x 1023 mol-1]
1.20 x 1022
2.41 x 1022
1.51 x 1023
3.02 x 1023
Correct answer is C
No explanation has been provided for this answer.
netralization with NaOHfoolowed by filtration
neutralization with NaOH followed by distillation
fractional distillation
filtration followed by distillation
Correct answer is D
No explanation has been provided for this answer.
C 5H 12O
C 3H 8O
C 6H 13O 2
C 4H 9O
Correct answer is B
No explanation has been provided for this answer.