Question

. Two potted plants A and B are covered separately with bell-jars. A watch glass with a chemical to absorb carbon dioxide is kept inside the bell-jar where plant A is kept. a) Name the chemical which is kept in the watch glass. b)State the reason why bottom of the bell-jars must be sealed to the glass plates on which they are kept and how can it be sealed.

Answer 1

Answer:

the chemical is potassium hydroxide

it is used to absorb CO2 present in the jar

bottom must be sealed so that Co2 from outside can not enter the jar

Answer 2

Answer:

a) the chemical is pottasium hydroxide

b)the bottom of the jar must be sealed to make the jar airtight , it can be done by using vaseline so that the set up is airtight

c)plant b