Sample Test Science
Cu + ZnSO4 ---- Zn + CuSO4 This reaction is an example of
What happens when dilute Sulphuric acid is added to Zn granules?
Tick the correct answer.
Identify the type of reaction in each case. Zinc carbonate(s) →
Zinc oxide(s) + Carbon dioxide(g) Hydrogen(g) + Chlorine(g) → Hydrogen
The balancing of chemical equations is in accordance with:
What type of reaction is respiration
A solution of a substance ‘X’ is used for white washing. Name the
substance ‘X’ and write its formula.
Acids react with bases to form salt and water. This reaction is
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.
How is the concentration of hydronium ions (H3O + ) affected when a
solution of an acid is diluted?