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Chemistry 1986 JAMB Past Questions

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41
10cm3 of hydrogen fluoride gas react with 5cm3 of dinitrogen difluoride gas (N2F2) to form 103 of a single gas. Which of the following is the most likely equation of the reaction?
  • A. HF + N2F2 \(\to\) N2HF3
  • B. 2HF + N2F2 \(\to\) 2NHF2
  • C. 2HF + N2F2 \(\to\) N2H2F3
  • D. HF + 2N2F2 \(\to\) N4HF2
View Answer & Discuss (13) JAMB 1986
42

The number of atoms of chlorine present in 5.85g of NaCl is [Avogadro's Number = 6.02 x 10\(^{23}\)]

  • A. 6.02 x 1022
  • B. 5.85 x 1023
  • C. 6.02 x 1023
  • D. 5.85 x 1024
View Answer & Discuss (2) JAMB 1986
43

How much of magnesium is required to react with 260cm3 of 0.5 M HCl? [Mg = 24]

  • A. 0.3g
  • B. 1.5g
  • C. 2.4g
  • D. 3.0g
View Answer & Discuss (9) JAMB 1986
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44

The relationship between the velocity (U) of gas molecules and their relative molecular mass (M) is shown by the equation

  • A. U = (kM)\(\frac{1}{2}\)
  • B. U = (kM)2
  • C. U = \(\sqrt{\frac{k}{m}}\)
  • D. U = \(\frac{k}{m}\)
View Answer & Discuss (8) JAMB 1986
45
An element with atomic number twelve is likely to be
  • A. electrovalent with a velocity of 1
  • B. electrovalent with a valency of 2
  • C. covalent with a valency of 2
  • D. covalent with valency of 4
View Answer & Discuss (5) JAMB 1986
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