Post Utme Obafemi Awolowo University Chemistry Past Questions and Answers

Question 16:

Metal salt of long chain fatty acids are known as ____________

A. Detergent
B. Double salts
C. Soaps
D. Grease

Question 17:

The compound
[image]
when refluxed with dilute \(HCl\), is hydrolysed to give ____________

A. \(CH _{3} COOH\) and \(CH _{3} CH _{2} CH _{2} OH\)
B. \(CH _{3} COOH\) and \(CH -\) \({ }_{3} CH _{2} CH _{3} \)
C. \(CH _{3} COOH\) and \(CH _{3} CH _{2} OH\)
D. \(CH _{3} COOH\)

Question 18:

The compound
[image]
is the product of oxidation of ____________

A. Butan \(-3-\) ol
B. Butan \(-1-\) ol
C. \(3-\) methylpropan \(-2-\) ol
D. Butan \(-2- ol\)

Question 19:

The curve above represents the solubility curve of \(KClO _{3}\). The number of moles of \(KClO _{3}\) crystals produced by cooling \(200 cm ^{3}\) of a saturated solution of the salt from \(65^{\circ} C\) to \(25^{\circ} C\) is ____________

A. \(6.30 mol\)
B. \(1.26\) mole
C. \(0.63\) mole
D. \(7.30\) mole

Question 20:

During a compression process involving an ideal gas at pressure \(P_{1}\), when the volume, \(V_{1}\) of the gas was halved, the temperature in Kelvin increases by half its initial value. The final pressure \(P_{2}\) is given by ____________

A. \(3 P_{1}
B. \(12 P_{1}\)
C. \(6 P_{1}\)
D. \(1.5 P _{1}\)