Chemistry 2019 JAMB Past Questions

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Which of the following conditions will most enhance the spontaneity of a reaction?

A. \(\Delta\)H is negative and greater than T\(\Delta\)S
B. \(\Delta\)H is negative and \(\Delta\)S = 0
C. \(\Delta\)H is positive and less than T\(\Delta\)S
D. \(\Delta\)H is positive and equal to T\(\Delta\)S

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X is a substance which liberates CO\(_2\) on treatment with concentrated H\(_2\)SO\(_4\). A warm solution of X can decolorize acidified KMnO\(_4\). X is

A. HCOOH
B. NaHCO\(_3\)
C. FeCO\(_3\)
D. H\(_2\)C\(_2\)O\(_4\)

View Answer & Discuss 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 = \((\frac{k}{M})^{\frac{1}{2}}\)

View Answer & Discuss (3) JAMB 2019

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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

View Answer & Discuss (2) 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

View Answer & Discuss (3) JAMB 2019

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