Chemical reaction and equation - Nahush Chaudhari

1. A reaction that absorbs heat energy.
6. A reaction where a more reactive element replaces a less reactive one from its compound.
8. An insoluble solid formed during a reaction in solution.
11. A substance formed after a chemical reaction.
15. Spoiling of fats and oils due to oxidation, often leading to a bad smell and taste.
17. A reaction where a substance gains oxygen or loses hydrogen.
18. A substance that starts a chemical reaction.

2. A biological exothermic reaction where glucose is broken down to release energy.
3. The slow formation of a reddish-brown coating on iron.
4. An unbalanced chemical equation is also called this type of equation.
5. A reaction where a single substance breaks down into two or more products.
7. A chemical equation where the number of atoms of each element is equal on both sides.
9. A reaction that releases heat energy.
10. Breaking a compound using electric current.
12. A reaction where two or more substances combine to form a single product.
13. A reaction where a substance loses oxygen or gains hydrogen.
14. A substance that speeds up a reaction without itself being consumed.
16. Gradual destruction of metals by reacting with atmospheric substances like oxygen.