Jamb Chemistry Past Questions For Year 2009

Question 26

What current will deposit 3.25g of zinc in 2hrs?

[Zn = 65, F = 96500 mol^-]

jamb 2009

• A. 3.25A
• B. 2.00A
• C. 1.34A
• D. 0.67A

Question 27

Which of the following metals is purified commercially by electrolysis?

jamb 2009

• A. Zn
• B. Fe
• C. Sn
• D. Cu

Question 28

Hydrogen sulphide gas can act as?

jamb 2009

• A. an oxidizing agent
• B. a dehydrating agent
• C. a bleaching agent
• D. a precipitating agent

Question 29

The oxidation of ammonia in excess air produces?

jamb 2009

• A. NO
• B. N₂O
• C. NO₂
• D. N₂O₄

Question 30

The equilibrium of an endothermic reaction which proceeds with an increase in volume can be shifted in the reverse direction by

jamb 2009

• A. increasing the temperature and decreasing the pressure
• B. increasing the pressure and increasing the temperature
• C. decreasing the temperature and increasing the pressure
• D. decreasing the pressure and decreasing the temperature