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Chemistry 2019 JAMB Past Questions

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21

When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called

  • A. electrovalent bond
  • B. compound bond
  • C. ionic bond
  • D. covalent bond
View Answer & Discuss (2) JAMB 2019
22

Which of the following represents the kind of bonding present in ammonium chloride?

  • A. ionic only
  • B. covalent only
  • C. ionic and covalent
  • D. dative covalent
View Answer & Discuss (6) JAMB 2019
23

Consider the reaction
A\(_{(s)}\) + 2B\(_{(g)}\) → 2C\(_{(aq)}\) + D\(_{(g)}\)
What will be the effect of a decrease in pressure on the reaction?

  • A. the equilibrium will shift
  • B. rate of forward reaction will increase
  • C. rate of backward reaction will increase
  • D. rates of forward and backward reaction are not affected
View Answer & Discuss (27) JAMB 2019
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24

For the general equation of the nature
xP + yQ ⇌ mR + nS, the expression for the equilibrium constant is

  • A. k[P]\(^x\)[Q]\(^y\)
  • B. \(\frac{m[R][S]}{x[P]y[Q]}\)
  • C. \(\frac{[P]^x[Q]^y}{[R]^m[S]^n}\)
  • D. \(\frac{[R]^m[S]^n}{[P]^x[Q]^y}\)
View Answer & Discuss JAMB 2019
25

Which of the following reactions is an oxidation process?

  • A. 2H\(^+\) + 2e\(^-\) \(\to\) H\(_2\)
  • B. 2O\(^{2-}\) + 4e\(^-\) \(\to\) O\(_2\)
  • C. OCl\(^-\) + H\(_2\)O + 2e\(^-\) \(\to\) 2OH\(^-\) + Cl\(^-\)
  • D. Cl + e\(^-\) \(\to\) Cl\(^-\)
View Answer & Discuss (2) JAMB 2019
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