Question

Moist germinated seeds were placed in thermos flask
A, and germinating seeds, which were boiled and then
soaked in 5% formalin, were placed in thermos flask
B. Thermometers were inserted in the flasks and the
mouth of each flask was plugged with moist cotton
wool. The two flasks were fixed upside down as shown
in the diagram. The initial temperature on both
thermometers was noted. After about 48 hours, the
temperature in flask A was found to be much higher
than that in flask B.
(i) State the object of using the apparatus.
(ii) Explain why a rise in temperature occurs in flask А.
(iii) If 5% formalin was not used after boiling the
seeds, the temperature of flask B would have risen
considerably. Explain.
(iv) Why were the flasks inverted ? ​

Answer 1

Answer:

Moist germinated seeds were place in thermos flask A and germinating seeds which were boiled and then soaked in 5% formalin were placed in thermos flask b thermomeyers were inserted in both and both are closed with moist cotton wool the two flasks were fixed upside down