Chemistry 2008 Neco Past Questions and Answers

Question 11 :

• NECO 2008

Brownian motion explains ____________

A. Boyle’s law
B. Collision theory
C. Laws of chemical combination
D. Molecular motion in liquids and gases
E. Vibrational motion in liquids.

Question 12 :

• NECO 2008

The reaction of hydrochloric acid and calcium trioxocarbonate (IV) produces

A. Calcium chloride, carbon (IV) oxide and water
B. Calcium chloride, and trioxocarbonate (IV) acid
C. Calcium hydroxide, carbon (IV) oxide and chlorine gas
D. Calcium hydroxide, carbon (IV) oxide and water
E. Calcium metal and water.

Question 13 :

• NECO 2008

If two elements X and Z with electronic configurations 2,8.3 and2,8,6 respectively combine, the compound formed will have the formula

A. XZ
B. XZ₂
C. X₂Z
D. X₂Z₃
E. X₃Z₂

Question 14 :

• NECO 2008

The following gases are diatomic EXCEPT

A. Fluorine
B. Helium
C. Hydrogen
D. Nitrogen
E. Oxygen

Question 15 :

• NECO 2008

Which of these is NOT a physical property f water?

A. Can be used to dissolve organic substances
B. Has a boiling point of 100 ° C
C. Has a density of 19cm3 at 40 °C
D. Has a freezing point of 0 ° C
E. Is neutral to litmus