Question

Study the given experimental set up. What happens when the rubber sheet is pulled down?


(i) Air pressure inside the bell jar increases.

(ii) The balloons inside the jar expand.

(iii)This is similar to expansion of lungs during inhalation.

(iv)This is similar to contraction of lungs during exhalation.

(ii), (iii) and (iv) only

(ii) and (iii) only

(i) and (iv) only

(i), (iii) and (iv) only

Answer 1

Answer:

ii) The balloons inside the jar expand.

(iii)This is similar to expansion of lungs during inhalation.

(iv)This is similar to contraction of lungs during exhalation.

Explanation:

correct answer ,.=,. (ii),(iii)and(iv)

Answer 2

ii) and (iii) only it explains the working of lungs