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 = $k{M}^2$
D. V = $(\frac{k}{M}{)}^{\frac{1}{2}}$

Question 132:

• JAMB 2019

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

A. ${}_{14}^{30}$Si
B. ${}_{13}^{32}$Al
C. ${}_{17}^{32}$Cl
D. ${}_{16}^{32}$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