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Chemistry Past Questions

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3716

In the reaction:
M + N → P
ΔH = +Q kJ

Which of the following would increase the concentration of the product?

  • A. Adding a suitable catalyst
  • B. Increasing the concentration of P
  • C. Increasing the temperature
  • D. Decreasing the temperature
View Answer & Discuss JAMB 2019
3717

A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180. Find the molecular formula.
[H = 1, C = 12, O = 16]

  • A. C\(_3\)H\(_6\)O\(_3\)
  • B. C\(_6\)H\(_6\)O\(_3\)
  • C. C\(_6\)H\(_{12}\)O\(_6\)
  • D. CH\(_2\)O
View Answer & Discuss (9) JAMB 2019
3718

The IUPAC nomenclature of the compound
H\(_3\)C - CH(CH\(_3\)) - CH(CH\(_3\)) - CH\(_2\) - CH\(_3\)

  • A. 3,4- dimethylhexane
  • B. 2,3- dimethyl pentane
  • C. 2- ethyl hexane
  • D. 2,3- dimethylhexane
View Answer & Discuss (2) JAMB 2019
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3719

Which of the following gases contains the least number of atoms at s.t.p?

  • A. 1 mole of butane
  • B. 4 moles of chlorine
  • C. 3 moles of ozone
  • D. 7 moles of argon
View Answer & Discuss (16) JAMB 2019
3720

What mass of magnesium would be obtained by passing a current of 2 amperes for 2 hours 30 mins, through molten magnesium chloride?
[1 faraday = 96500C, Mg = 24]

  • A. 1.12g
  • B. 4.48g
  • C. 1.80g
  • D. 2.24g
View Answer & Discuss (23) JAMB 2019
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