Post Utme Economics Past Questions and Answers

Question 991:

Which of the following zones is NOT part of a non-luminous Bunsen flame?

A. Blue zone
B. Unburnt
C. Bright yellow luminous zone
D. Non - luminous zone

Question 992:

Which of the following is a secondary air pollutant?

A. Particulate dust
B. Sulphur (IV) oxide
C. Ozone
D. Chlorofluorocarbons

Question 993:

Ammonia can be obtained from diammonium tetraoxosulphate \((\mathrm{VI})\) by heating it with ____________

A. Dilute \(\mathrm{HCl}\)
B. Con \(\mathrm{H}_2 \mathrm{SO}_4\)
C. \(\mathrm{CuSO}_4\)
D. \(\mathrm{NaOH}\)

Question 994:

Which of the following compounds is a soapless detergent?

A. \(\mathrm{C}_{12} \mathrm{H}_{25} \mathrm{OSO}_3 \mathrm{Na}\)
B. \(\mathrm{C}_{17} \mathrm{H}_{25} \mathrm{COONa}\)
C. \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{OH}\)
D. \(\mathrm{C}_4 \mathrm{H}_9 \mathrm{COOC}_2 \mathrm{H}_5\)

Question 995:

A motor - car is uniformity retarded and brought to rest from a speed of \(90 \mathrm{~km} / \mathrm{h}\) in \(10 \mathrm{~s}\). Find its acceleration.

A. \(25 \mathrm{~ms}^{-1}\)
B. \(2.5 \mathrm{~ms}^{-2}\)
C. \(-2.5 \mathrm{~ms}^{-}\) \({ }^2\)
D. \(-2.5 \mathrm{~ms}^{-1}\)