Post Utme Chemistry Questions
Question 166:
\(\mathrm{H}_{2} \mathrm{SO}_{4}\) is used to remove rust on the surface of iron(pickling) before electroplating. The type of reaction involved is ____________
- A Redox reaction
- B Neutralization
- C Double decomposition
- D Hydrolysis
Question 167:
Silver chloride turns grey when exposed to sunlight because ____________
- A The silver ion is reduced to silver
- B The silver ion is oxidized to silver
- C Silver is a transition metal
- D The silver chloride forms complexes in the sun
Question 169:
When a solid substance disappears completely as a gas on heating, the substances is said to have undergone ____________
- A Evaporation
- B Distillation
- C Crystallization
- D Sublimation
Question 170:
A chemical reaction is always associated with ____________
- A An increase in the composition of one of the substances
- B A change in the volume of the reactants
- C A change in the nature of the reactants
- D The formation of new substances