Question

1. Is the distilled water acidic/basic/neutral? How would you verify it?
3. How would you show that setting of curd is a chemical change?
4. Why rusting of iron objects is faster in coastal areas than in deserts.

Answer 1

Distilled water is neutral in nature We can test this by using pH paper which turns green on adding water to it Setting of curd is a chemical change as it cannot be redone I.e. we cannot reverse this Rusting is faster in coastal areas as in those areas there is a large amount of moist air present and rusting is fast in moist air. Rusting requires three things to be formed moisture and oxygen and water