Jamb Chemistry 2008 Past Questions and Answers

Question 11:

• JAMB 2008

In the periodic table, the electrical and thermal conductivities are properties of elements that

A. Decrease across the period and increase down the group
B. Increase across the period and decrease down the group
C. Decrease across the period and down the group`
D. Increase acrosss the period and down the group

Question 12:

• JAMB 2008

\( _{11} ^{11}Na + _0^1n → _{11}^{24}Na \)
The reaction above is an example of

A. Nuclear fission
B. Nuclear fusion
C. Artificial transmutation
D. Beta decay

Question 13:

• JAMB 2008

Air boiled out of water as steam is richer in

A. Nitrogen and oxygen
B. Carbon (IV) oxide and oxygen
C. Noble gases and carbon (IV) oxide
D. Oxygen and noble gases

Question 14:

• JAMB 2008

In the course of purifying water for town supply the water is passed through large settlings tanks, containing sodium aluminate (III) to remove

A. Large particles
B. Germs
C. Fine particles
D. Odour

Question 15:

• JAMB 2008

When a few drops of water is added to a blue anhydrous cobalt (II) chloride, the colour changes to

A. White
B. Pink
C. Red
D. Blue