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Chemistry 2019 JAMB Past Questions

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66

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
View Answer & Discuss (15) JAMB 2019
67

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 (5) JAMB 2019
68

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 (13) JAMB 2019
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
69

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 (3) JAMB 2019
70

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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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts