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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 1386:

The following glasswares are used to measure the volume of liquids EXCEPT

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A Graduated beaker
B Pipette
C Test tube
D Burette

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Question 1387:

Pauli exclusion principle is related to

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A Quantity of electrons in the valence shell
B Filling the orbitals with lower energy first
C The filling of degenerated orbitals
D Quantum numbers of electrons

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Question 1388:

The species with no electron in the 3d-orbital is

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A \(Zn^{2+}\)
B \(Sc^{3+}\)
C Cu
D \(Mn\)

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Question 1389:

The seperation of Nitrogen from oxygen using fractional distillation of air is possible because

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A Nitrogen is less dense than oxygen
B Oxygen is more reactive than nitrogen
C Of the difference in their boiling points
D They belong to the same period

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Question 1390:

The purity of a solid sample can best be determined by its

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A Boiling point
B Melting point
C Conductivity
D Solubility

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