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Chemistry 2019 JAMB Past Questions

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56

The following are isoelectronic ions except

  • A. Na\(^+\)
  • B. Mg\(^{2+}\)
  • C. Si\(^{2+}\)
  • D. O\(^{2+}\)
View Answer & Discuss (2) JAMB 2019
57

Consider the reaction: A + 2B\(_{(g)} \rightleftharpoons \) 2C + D\(_{(g)}\) (\(\Delta\)H = +ve)

What will be the effect of decrease in temperature on the reaction?

  • A. Rate of backward reaction will increase
  • B. The equilibrium constant will shift
  • C. Rates of forward and backward reactions are not affected
  • D. Rate of forward reaction will increase
View Answer & Discuss JAMB 2019
58

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
View Answer & Discuss (1) JAMB 2019
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59

The shapes of water, ammonia, carbon (iv) oxide and methane are respectively

  • A. linear, tetrahedral, angular and pyramidal
  • B. angular, pyramidal, linear and tetrahedral
  • C. pyramidal, linear, tetrahedral and angular
  • D. tetrahedral, angular, pyramidal and linear
View Answer & Discuss (5) JAMB 2019
60

Which quantum divides shells into orbitals?

  • A. Spin
  • B. Principal
  • C. Azimuthal
  • D. Magnetic
View Answer & Discuss (1) JAMB 2019
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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709