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.
1.12g
4.48g
1.80g
2.00g
Correct answer is D
Given Data:
Time (T) = 2hrs 30mins
where 2hrs =120mins
2hrs & 30mins = (120 + 30)mins = 150mins
150mins to Seconds = 150 x60 = 9,000s
Q = I x T
2 x 9,000 =18,000
where mg has valency of +2
So 2 x 96500 will discharge 24g of mg
and 18,000 will discharge xg of mg
2 x 96500 =24
18,000 =x
x = 24×18,0002x96500
≈ 2.00g
The IUPAC nomenclature of the compound
H3C - CH(CH3) - CH(CH3) - CH2 - CH3
3,4- dimethylhexane
2,3- dimethyl pentane
2- ethyl hexane
2,3- dimethylhexane
Correct answer is B
No explanation has been provided for this answer.
In the reaction:
M + N → P
ΔH = +Q kJ
Which of the following would increase the concentration of the product?
Adding a suitable catalyst
Increasing the concentration of P
Increasing the temperature
Decreasing the temperature
Correct answer is C
No explanation has been provided for this answer.
Sulphur exists in six forms in the solid state. This property is known as
Isomerism
Allotropy
Isotopy
Isomorphism
Correct answer is B
No explanation has been provided for this answer.