Question

(C) Bengali (Bangla)
D) English
19. What chemicals are used in fire extinguishers used in houses and
(A) Water, potassium bicarbonate and fluorocarbor
(B) Water, calcium hydroxide and chlorofluorocarbons
(C) Water, potassium hydroxide and chlorobenzene
(D) None of these
20. In which direction a rainbow is formed ?
(A) Above the sun
(B) Below the sun​

Answer 1

Explanation:

19.d.none of these

20.b.below the sun

Answer 2

Answer:

19)none of these

20)below the sun