Question

The following experimental set-ups were kept in the laboratory to show that ‘CO2 is given out during respiration’.
After two hours, students observed that water rises in the delivery tube
(1) only in set up (A)
(2) only in set up (B)
(3) in both (A) and (B)
(4) neither in set up (A) nor in set up (B)

Answer 1

give the set up description