Jamb Chemistry 2019 Past Questions and Answers

Question 131:

• 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 132:

• JAMB 2019

The emission of two successive beta particles from the nucleus \(^{32} _{15} P\) will produce

A. \(^{30} _{14}\)Si
B. \(^{32} _{13}\)Al
C. \(^{32} _{17}\)Cl
D. \(^{32} _{16}\)S

Question 133:

• JAMB 2019

Hydrogen diffused through a porous plug

A. Thrice as fast as oxygen
B. At the same speed as oxygen
C. Four times as fast as oxygen
D. Twice as fast as oxygen

Question 134:

• 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

Question 135:

• JAMB 2019

The cost of discharging 6.0g of a divalent metal, X from its salt is ₦12.00. What is the cost of discharging 9.0g of a trivalent metal, Y from its salt under the same condition?
[X = 63, Y = 27, 1F = 96,500C]

A. N12.00
B. N27.00
C. N63.00
D. N95.00