Q.) Which of the following steps can be
followed for making the apparatus air
tight?
(I) placing the plants on glass plate
(II) using a suction pump.
(III) applying aseline to seal the bottom of
jar.
(IV) creating vacuum
(a) (I) and (II) (b) (II) and (III)
(c) (I) and (III) (d) (II) and (IV)
Ans. (c) (I) and (III)
