Post Utme Economics Past Questions and Answers

Question 891:

Which of the following mixture will produce gas?

A. \(\mathrm{CO}_2\) and \(\mathrm{H}_2\)
B. \(\mathrm{CO}_2\) and \(\mathrm{N}_2\)
C. \(\mathrm{CO}_2\) and \(\mathrm{H}_2 \)
D. \(\mathrm{CO}\) and \(\mathrm{N}_2\)

Question 892:

What is the main use of the crucible in the laboratory?

A. Filtering precipitates
B. Igniting precipitates
C. Drying salts
D. Condensing vapour

Question 893:

Methane, ethane, propane, butane and pentane are five simplest

A. Alkenes
B. Alkynes
C. Alkanes
D. Olefins

Question 894:

When a system at equilibrium is disturbed, the equilibrium adjusts itself in such a way as to cancel out or annul the effect. This is ____________

A. The law of chemical equilibrium
B. Le Chatelier's principle
C. Law of enthalpy
D. Law of entropy

Question 895:

The reaction between \(\mathrm{KOH}\) and \(\mathrm{NO}_2\) produces water and ____________

A. \(\mathrm{KNO}_3 \)
B. \(\mathrm{HNO}_3 \)
C. \(\mathrm{KNO}_3\)
D. \(\mathrm{KNO}_3\) and \(\mathrm{KNO}_2\)