Question 621:

• JAMB 1989

The above graph shows a typical heating curve from the solid phase through the liquid phase to the gaseous phase of a substance. Which part of the curve shows solid and liquid in equilibrium?

A. T
B. U
C. X
D. Y

Question 622:

• JAMB 1989

Use the figure above to answer this question. Which of the following compounds is an isomer of the compound

A. A
B. B
C. C
D. D

Question 623:

• JAMB 1989

Use the figure above to answer this question. Which of the following is NOT a monomer?

A. A
B. B
C. C
D. D

Question 624:

• JAMB 1989

What is the IUPAC name for the compound

A. 1-chloro-2-methylprop-2,3-ene
B. 1-chloro-2-methylprop-2-ene
C. 3-chloro-2-methylprop-1-ene
D. 3-chloro-2methylprop-1,2-ene

Question 625:

• JAMB 1990

Which of the following is a physical change?

A. The bubbling of chlorine into water
B. The bubbling of chlorine into a jar contanining hydrogen
C. The dissolution of sodium chloride in water
D. The passing of steam over heated iron