Chemistry 2015 Jamb Past Questions and Answers

Question 66 :

• JAMB 2015

One mole of a hydrocarbon 36g of carbon and its density is 20. The structure of hydrocarbon is (organic chemical)

A. CH\(_2\)C = CH\(_2\)
B. CH\(_3\)CH = CH\(_2\)
C. CH\(_3\)CH\(_2\)C = CH
D. CH\(_3\)CH\(_2\)CH\(_3\)

Question 67 :

• JAMB 2015

In the electrolysis of CuSo_4(g) using platinum electrode the reaction at the anode is

A. 4H+ 4e - 2H₂
B. 4OH^-- 4e = 2H₂O + O₂
C. 2OH - 2e_- = 2OH
D. 2OH^- + 2OH = 2H₂O + O₂

Question 68 :

• JAMB 2015

S block elements of the periodic table one made up of

A. Groups 1, 2, 3
B. Groups 1, and 2
C. Group 3
D. Group 3 to 7

Question 69 :

• JAMB 2015

The oxidation state of oxygen on tetraoxosulphate iv acid is

A. -4
B. -2
C. 4
D. -8

Question 70 :

• JAMB 2015

In the electrolysis of brine the anode is

A. Platinum
B. Copper
C. Zinc
D. Carbon