Jamb Chemistry 2019 Past Questions and Answers

Question 106:

• JAMB 2019

Sulphur exists in six forms in the solid state. This property is known as

A. Isomerism
B. Allotropy
C. Isotopy
D. Isomorphism

Question 107:

• JAMB 2019

In the reaction:
M + N → P
ΔH = +Q kJ
Which of the following would increase the concentration of the product?

A. Adding a suitable catalyst
B. Increasing the concentration of P
C. Increasing the temperature
D. Decreasing the temperature

Question 108:

• JAMB 2019

A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180. Find the molecular formula.
[H = 1, C = 12, O = 16]

A. C\(_3\)H\(_6\)O\(_3\)
B. C\(_6\)H\(_6\)O\(_3\)
C. C\(_6\)H\(_{12}\)O\(_6\)
D. CH\(_2\)O

Question 109:

• JAMB 2019

The IUPAC nomenclature of the compound
H\(_3\)C - CH(CH\(_3\)) - CH(CH\(_3\)) - CH\(_2\) - CH\(_3\)

A. 3,4- dimethylhexane
B. 2,3- dimethyl pentane
C. 2- ethyl hexane
D. 2,3- dimethylhexane

Question 110:

• JAMB 2019

Which of the following gases contains the least number of atoms at s.t.p?

A. 1 mole of butane
B. 4 moles of chlorine
C. 3 moles of ozone
D. 7 moles of argon