Post Utme Chemistry Past Questions and Answers

Question 456:

The shapes of \(\mathrm{CO}_{2}, \mathrm{H}_{2} \mathrm{O}\) and \(\mathrm{CH}_{4}\) respectively are ____________

A. Bent, linear and tetrahedral
B. Bent, tetrahedral and linear
C. Linear, bent and tetrahedral
D. Tetrahedral, linear and bent

Question 457:

Evaporation is affected by EXCEPT ____________

A. Wind and air dryness
B. The liquid's nature
C. Temperature
D. The freeness of the liquid

Question 458:

The final oxidation product of alkanol, alkanal and alkanones is __________

A. Alkanamide
B. Alkanoyl halide
C. Alkanoic acid
D. Alkanoate

Question 459:

Calculate the quantity of electricity in coulombs required to liberate \(10 \mathrm{~g}\) of copper from a copper compound.

\(\left[\mathrm{Cu}=64, \mathrm{~F}=96500 \mathrm{Cmol}^{-1} \right]\)

A. \(30156.3\)
B. \(60784.5\)
C. \(15196.5\)
D. \(32395.5\)

Question 460:

mass of silver deposited when a current of \(10 \mathrm{~A}\) is passed through a solution of silver salt for 4830s is ____________

A. \(27.0 \mathrm{~g}\)
B. \(108.0 \mathrm{~g}\)
C. \(13.5 \mathrm{~g}\)
D. \(54.0 \mathrm{~g}\)