Post Utme Chemistry Past Questions and Answers

Question 1131:

The relationship between the density (d) of a gas and the rate (r) at which the gas diffuses is ____________

A. R=Kd
B. \(r=K d-12\)
C. \(r=K d^{1 / 2}\)
D. \(r=K d^{-1}\)

Question 1132:

The pressure exerted by a sample of a gas confined in \(5.86\) \(dm ^{3}\) container at \(20^{\circ} C\) is \(4.1 atm\). What is the number of moles of the gas in the sample?
\(\left( R =0.082 dm ^{3} atm \textrm {mol } ^ { - } \right.\) \(\left.1 K ^{-1}\right)\)

A. \(1.00\)
B. \(2.00\)
C. \(3.00\)
D. \(4.00\)

Question 1133:

\(50 cm ^{3}\) of hydrogen are sparked with \(100 cm ^{3}\) of oxygen at \(110^{\circ} C\) and \(1 atm\). If the whole reaction mixture passes through an alkaline solution pyrogallol, the volume of the residual gas is ____________

A. \(125 cm ^{3}\)
B. \(100 cm ^{3}\)
C. \(75 cm ^{3}\)
D. \(50 cm ^{3}\)

Question 1134:

Inter-atomic combinations involve the ____________

A. Neutrons in the nucleus only
B. Protons in the nucleus only
C. Electrons in the outer shell only
D. Electrons in all the shells

Question 1135:

Which of the following is not a characteristic property of ionic compounds?

A. Solubility in polar solvents
B. Low melting points
C. Conduction of electricity in aqueous solution
D. Fast reactions in solution