Post Utme Chemistry Past Questions and Answers

Question 31:

Sieving is a technique used to separate mixtures containing 20% oxygen by volume. Which of the reactants was in excess?

A. Carbon (II) oxide
B. Oxygen
C. Carbon (IV) oxide
D. Nitrogen

Question 32:

The abnormally high boiling point of water is primarily due to ____________

A. Ionic bonding
B. Covalent bonding
C. Dative bonding
D. Coordinate covalent bonding
E. Hydrogen bonding

Question 33:

The energy required to remove an electron from the isolated gaseous atom is known as ____________

A. Electron affinity
B. Bond energy
C. Lonisation energy
D. Electronegativity
E. Electrovalency

Question 34:

The group that oxygen belongs to is collectively called ____________

A. Allotropes
B. Halogens
C. Chalcogens
D. Alkenes
E. Ozonides

Question 35:

The ideal gas equation is ____________

A. \(P=n R T\)
B. \(P R=n V T \)
C. \(P V=g R T \)
D. \(V=k T \)
E. \(P V=K V \)