Question

10. 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
3
which a
se
than that in flask B.
FLASK
a
MOIST SEEDS
DEAD SEEDS
QUOTE
THERMOMETERS
A
B
(1) State the object of using the apparatus.
(ii) Explain why a rise in temperature occurs in flask
A
(ii) 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 ?
(ICSE 1998)​

Answer 1

Answer:

I'm sorry dear I don't have idea I'm really really sorry