Question

1. A large number of physical and chemical changes are taking place around us. Some of the
are natural while some others are due to human activity. Some of these cause pollution
while some others are essential for life.
Now, answer the following questions :
2) In early times, quick lime was used for white-wash. Now a days, use of paints has become
very common. Do you think it is better in all respects or you think it is not?
+) Cooking of food is a chemical reaction. Cooking can be done using cow-dung cakestwood or
LPG cylinder or solar cooker or microwave oven. Which one do you think is the best and
why?
) We should eat freshly cut apple. Why?
We tell children not to eat too many chocolates. How would you explain to them the mode by
which their teeth are damaged?​

Answer 1

Answer:

in tamil history the information was released in chennai on Friday

Answer 2

Answer:

answer bhejiye please kha h answer