Chemistry Past Questions

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3266

The solubility of the solids that dissolves in a given solvent with the liberation of heat will

A. increase with an increase in temperature
B. decrease with an increase in temperature
C. decrease with a decrease in temperature
D. not be affected by changes in temperature

View Answer & Discuss (9) JAMB 2018

3267

What mass of Cu would be produced by the cathodic reduction of Cu\(^{2+}\) when 1.60A of current passes through a solution of CuSO\(_4\) for 1 hour. (F=96500Cmol\(^{-1}\) , Cu=64)

A. 7.64g
B. 3.82g
C. 1.91g
D. 0.96g

View Answer & Discuss (2) JAMB 2018

3268

Calculate the pH of 0.05 moldm\(^{-3}\) H\(_2\)SO\(_4\)

A. 1.30
B. 1.12
C. 1.00
D. 0.30

View Answer & Discuss (2) JAMB 2018

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3269

The choice of method for extracting a metal from its ores depends on the

A. strength of the core
B. position of the metal in the electrochemical series
C. source of the core
D. position of the metal in the periodic table

View Answer & Discuss JAMB 2018

3270

Which of the following produces relatively few ions in solution?

A. NaOH
B. Ca(OH)\(_2\)
C. KOH
D. AI(OH)\(_3\)

View Answer & Discuss JAMB 2018

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