Post Utme Chemistry Past Questions and Answers

Question 296:

The following molecules contain hydrogen bonding EXCEPT ____________

A. Ammonia
B. Ethanoic acid
C. Hydrogen fluoride
D. Water

Question 297:

If 20 cm³ of distilled water is added to 80cm³ of 0.50mol/dm³ HCl solution, the new concentration of the acid is ____________

A. 0.10 mol/dm³
B. 0.20mol/dm³
C. 0.40mol/dm³
D. 2.00mol/dm³

Question 298:

What is H202 acting as in the equation? \(H_2O_2 + 2Fe^{2+} ⟶ 2Fe^{3+}

A. Oxidizing agent
B. Reducing agent
C. An acid
D. A base

Question 299:

A 12V battery supplying a current of 20A was used to melt 1.5kg of ice at 0˚C. Calculate the time required if the latent heat of fusion of ice is 336 x 10J/kg

A. 35.0 min
B. 3.5 min
C. 76 min
D. 21.0 min

Question 300:

CHEMISTRY If the rate law obtained for a given reaction is given as rate = K[X]n [Y]m. what is the overall order of the reaction?

A. Nm
B. N/m
C. N + m
D. N – m