harshpratap415 Asked: December 2022 2 why should we treat factory wastes before discharging them into a river
harshpratap415 Asked: December 2022 3. (a) What are raw silk and spun silk?(b) On burning silk, it gives out the smell of burning hair. Give
harshpratap415 Asked: December 2022 6. (a) Why do wool yielding animals have a thick coat of hair on their bodies?(b) Why is shearing done in
harshpratap415 Asked: December 2022 23. In a contest, one positive mark is allotted for each correct answer and one negative mark inallotted for each wrong