Post Utme Chemistry Past Questions and Answers

Question 831:

\(2.0 g\) of a monobasic acid was made up to \(250 cm ^{3}\) with distilled water \(25.00 cm ^{3}\) of this solution required \(20.00 cm ^{3}\) of \(1.0 M NaOH\) solution for complete neutralization. The molar mass of the acid is ____________

A. \(200 g\)
B. \(150 g\)
C. \(100 g\)
D. \(50 g\)

Question 832:

What is the concentration of \(H ^{4}\) ions in moles per \(dm ^{3}\) of a solution of \(pH 4.398\) ?

A. \(4.0 \times 10^{-5}
B. \(0.4 \times 10^{-5}\)
C. \(\(4.0 \times 10^{-3}\)
D. \(0.40 \times 10^{-3}\)

Question 833:

What volume of \(11.0 M\) hydrocploric acdd must be diluted to obtain \(1 dm ^{3}\) of \(0.05 M\) acid?

A. \(4.5 cm ^{3}\)
B. \(5.65 cm ^{3}\)
C. \(6.76 cm ^{3}\)
D. \(7.78 cm ^{3}\)

Question 834:

If \(10.8 g\) of silver is deposited in arsilver coulometer connected in series with a copper coulometer, the volume of oxygen liberated is ____________
\(Ag =108\); \(Cu =64\); GMV at STP = \(22.40 dm ^{3} H\)

A. \( 0.56 cm ^{3}\)
B. \(5.60 dm ^{3}\)
C. \(11.20 dm ^{3}\)
D. \(22.40 dm ^{3}\)

Question 835:

The shape of the s-orbital is ____________

A. Spherical
B. Elliptical
C. Spiral
D. Circular