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.
22.4 dm3
11.2 dm3
1.12 dm3
0.560 dm3
Correct answer is D
For a diatomic divalent element like oxygen:
4 faraday (4 * 96,500) = 1 mole of the element = Molar volume of gas = 22.4
: 4 * 96,500 = 22.4
9650 = x
: x = \(\frac{9650 * 22.4}{ 4 * 96,500}\)
x = 0.56dm\(^3\)
2.50 g
2.73 g
3.28 g
4.54 g
Correct answer is C
No explanation has been provided for this answer.
Which of the following compounds is a base?
CO2
CaO
H3PO3
CH3COOCH3
Correct answer is B
No explanation has been provided for this answer.
less than 3.4
greater than 3.4
unaltered
the same as that of pure water
Correct answer is A
The addition of concentrated HCl to the solution makes the solution more acidic and the pH falls below the original value that is the pH value of the solution will now be less than 3.4.
Which of the following atoms represents deuterium?
No protons = 1, No of neutrons = 0, No of electrons = 0
No protons = 1, No of neutrons = 0, No of electrons = 1
No protons = 1, No of neutrons = 1, No of electrons = 1
No protons = 1, No of neutrons = 2, No of electrons = 1
Correct answer is C
No explanation has been provided for this answer.