Post Utme Chemistry Past Questions and Answers

Question 336:

If 3 moles of electrons are required to deposit 1 mole of a metal, \(M\) during the electrolysis of its molten chloride, the empirical formula of the metallic chloride is:

A. \(\mathrm{M}_{3} \mathrm{Cl} . \quad\)
B. \(\mathrm{M}_{3} \mathrm{Cl}_{4} \quad \mathrm{C}_{1}\)
C. \(\mathrm{M}_{2} \mathrm{Cl}\)
D. \( \mathrm{MCl}_{2}\)

Question 337:

Nuclear reactions can be used in the following except ____________

A. Gauging the thickness of objects.
B. Making atomic bombs.
C. Curing cancer.
D purifying wate

Question 338:

Which of the following compounds crystallizes without water of crystailization?

A. \(\mathrm{Na}_{2} \mathrm{CO}_{2}\)
B. \( \mathrm{CuSO}_{4}\)
C. \(\mathrm{MgSO}_{\text {, }}\)
D. \(\mathrm{NaCl}\)

Question 339:

The products of the electrolysis of dilute sodium chloride solution with platinum electrodesare

A. Hydrogen and oxygen.
B. Oxygen and chlorine.
C. Chlorine and water.
D. Sodium amalgam and chlorine.

Question 340:

Which of the following statements is not correct of Group 7 elements?

A. They are diatomic
B. They are good oxidizing agent
C. They are highly electronegative,
D. They have relatively low ionization Potentials.