Sample Test Science
1 Cu + ZnSO4 ---- Zn + CuSO4 This reaction is an example of
2 What happens when dilute Sulphuric acid is added to Zn granules?
Tick the correct answer.
3 Identify the type of reaction in each case. Zinc carbonate(s) →
Zinc oxide(s) + Carbon dioxide(g) Hydrogen(g) + Chlorine(g) → Hydrogen
chloride(g)
4 The balancing of chemical equations is in accordance with:
5 What type of reaction is respiration
6 A solution of a substance ‘X’ is used for white washing. Name the
substance ‘X’ and write its formula.
7 Acids react with bases to form salt and water. This reaction is
known as:
8 A calcium compound reacts with dilute hydrochloric acid to produce
effervescence. The gas evolved extinguishes a burning candle. Identify the
compound and the gas evolved.
9 How is the concentration of hydronium ions (H3O + ) affected when a
solution of an acid is diluted?
10