Organic Compounds - Jamb Chemistry Past Questions and Answers

Question 381:

• JAMB 2019

Which of the following pairs cannot be represented with a chemical formula?

A. Air and bronze
B. Bronze and sodium chloride
C. Copper and sodium chloride
D. Caustic soda and washing soda

Question 382:

• 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 383:

• 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 384:

• 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

Question 385:

• JAMB 2019

Which of the following could not be alkane?

A. C\(_4\)H\(_{10}\)
B. C\(_5\)H\(_{12}\)
C. C\(_7\)H\(_{14}\)
D. C\(_8\)H\(_{18}\)