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 gases contains the least number of atoms at s.t.p?
1 mole of butane
4 moles of chlorine
3 moles of ozone
7 moles of argon
Correct answer is D
4 moles of chlorine gas = 4Cl\(_2\) = 8 atoms of chlorine
3 moles of ozone = 3O\(_3\) = 9 atoms of oxygen
1 mole of butane = C\(_4\)H\(_{10}\)
7 mole of argon = 7Ar = 7 atoms of argon
Argon is a monoatomic noble gas with the least number of atoms.
The IUPAC nomenclature of the compound
H\(_3\)C - CH(CH\(_3\)) - CH(CH\(_3\)) - CH\(_2\) - CH\(_3\)
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.
C\(_3\)H\(_6\)O\(_3\)
C\(_6\)H\(_6\)O\(_3\)
C\(_6\)H\(_{12}\)O\(_6\)
CH\(_2\)O
Correct answer is C
C → 40/12 ≈ 3
H → 6.7/1 ≈ 6
O → 53.3/16 ≈ 3
dividing through with the lowest value, 3
C\(_1\)H\(_2\)O\(_1\)
[C\(_1\)H\(_2\)O\(_1\)]n = 180
[12 + 2 + 16]m = 180
30n = 180
n = 6
:C\(_6\)H\(_12\)O\(_6\)
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.