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. $C{H}_{3}COOH$ and $C{H}_{3}C{H}_{2}C{H}_{2}OH$
B. $C{H}_{3}COOH$ and $CH-$ ${}_{3}C{H}_{2}C{H}_3$
C. $C{H}_{3}COOH$ and $C{H}_{3}C{H}_{2}OH$
D. $C{H}_{3}COOH$

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 $KCl{O}_3$. The number of moles of $KCl{O}_3$ crystals produced by cooling $200c{m}^3$ of a saturated solution of the salt from ${65}^{\circ }C$ to ${25}^{\circ }C$ is ____________

A. $6.30mol$
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. $12P_1$
C. $6P_1$
D. $1.5P_1$