Across
- 2. The gas with rotten egg smell.
- 6. the substance that takes part in a chemical reaction
- 8. The gas that rekindles a glowing splinter.
- 10. An insoluble solid formed during the reaction
Down
- 1. the substances formed during the chemical reaction
- 3. The substance that alters the rate of the chemical reaction without taking part in it.
- 4. The reaction in which heat is released.
- 5. The gas formed when zinc reacts with hydrochloric acid
- 7. The colour of the residue formed when copper carbonate is heated.
- 9. Carbon dioxide turns ______ milky.