Question

: Exercise :
1. "To pour water on calcium oxide." Which is another way to classify this reaction ? Explain.
2. In experiment (C), speed of reaction increases if we use iron wire scrubber instead of iron nail.
Which factor do you observe that affects the rate of reaction? Explain.
3. Name the substance which remains in a test tube after heating ferrous sulphate.
4. Observe double displacement reactions given in the text book and write down the similarities.​

Answer 1

Answer:

1. This reaction can be classified as combination reaction or exothermic oxide. We can see that on pouring water on CaO calcium hydroxide is formed as well as heat is released. CaO +H2O---->Ca(OH)2+ heat.

3. The substance left is ferric oxide Fe2O3. It is a brown powder.

4.The similarity between double displacement reaction is that the compounds react by an exchange of ions. Also a precipitate is left out.