Types Of Chemical Reactions

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

1. The hardest substance in the human body is the coating of teeth.
2. Sugarcane requires soil.
3. Rice requires soil.
4. is a double salt.
5. Calcium oxide reacts with water to produce .
6. When lead nitrate is heated, the gas liberated is

N O_{2}

and its colour is .
7. When Barium chloride reacts with sodium sulphate, the product formed is and it is a precipitate.
8. Calcium carbonate present in the marble reacts with hydrochloric acid at a faster rate at temperature.
9. is a substance which furnishes

H^{+}

ions when dissolved in water and a is a substance which furnishes

O H^{-}

in water.
10. Metal displaces gas from dilute acid and the flame goes off with a sound.

Types Of Chemical Reactions

Gap-fill exercise