Jamb Chemistry 2006 Past Questions and Answers

Question 31:

• JAMB 2006

The element with the electron configuration 1s²2s²2p³ is

A. Calcium
B. Chlorine
C. Oxygen
D. Nitrogen

Question 32:

• JAMB 2006

A decrease in atomic size and an increase in nuclear charge across a period lead to

A. An increase in the tendency to lose electron
B. An increase in chemical reactivity
C. A decrease in electropositivity
D. A decrease in covalency in bond formation

Question 33:

• JAMB 2006

The order in which a mixture of sand, ammonium chloride and sodium chloride can be separated is

A. Dissolution → dryness → filtration → evaporation
B. Filtration → sublimation → evaporation → dryness
C. Sublimation → dissolution → filtration → evaporation
D. Dissolution → filtration → sublimation → evaporation

Question 34:

• JAMB 2006

The idea of planetary electron was that of

A. Rutherford
B. Thompson
C. Bohr
D. Dalton

Question 35:

• JAMB 2006

If 30cm³ of gas at 50^oC is warmed to 80^o at a fixed pressure, the fractional increase in volume is

A. 0.009
B. 0.093
C. 0.910
D. 1.090