Electrolysis - Jamb Chemistry Past Questions and Answers

Question 106:

• JAMB 2019

What mass of magnesium would be obtained by passing a current of 2 amperes for 2 hours 30 mins, through molten magnesium chloride?
[1 faraday = 96500C, Mg = 24]

A. 1.12g
B. 4.48g
C. 1.80g
D. 2.00g

Question 107:

• JAMB 2019

A cell shorthand notation can be written as A / A\(^+\) // B\(^{2+}\) /B. The double slash in the notation represents the

A. Electrolyte
B. Electrodes
C. Salt bridge
D. Solid - liquid interface

Question 108:

• JAMB 2019

Hydrogen bond is a sort of

A. Van der waals force
B. Dative bond
C. Ionic bond
D. A covalent bond

Question 109:

• JAMB 2019

The velocity, V of a gas is related to its mass, M by (k = proportionality constant)

A. V = \(\frac{k}{M}\)
B. V = \(\frac{k}{M^{\frac{1}{2}}}\)
C. V = \(kM^2\)
D. V = \((\frac{k}{M})^{\frac{1}{2}}\)

Question 110:

• JAMB 2019

If the cost of electricity required to discharge 10g of an ion X\(^{3+}\) is N20.00, how much would it cost to discharge 6g of ion Y\(^{2+}\)?
[1 faraday = 96,500C, atomic masses are X = 27, Y = 24]

A. N10.00
B. N6.00
C. N20.00
D. N9.00