2 points
Q.11 When a deflated
balloon is attached to the
mouth of an empty test
tube, and the tube is
immersed in a glass filled
with boiling water, which
of the following would be
observed?
Balloon
Test
tube
M
Boiling
water
(a) The test tube breaks.
O .
O (b) The balloon gets inflated.
O
(c) The balloon gets sucked into
the test tube.
(d) The balloon's material gets
burnt at the rim.
O
Answers
Answer:
(b) The balloon gets inflated.
Q.11 When a deflated balloon is attached to the mouth of an empty test tube, and the tube is immersed in a glass filled with boiling water, which of the following would be observed?
(c) The balloon gets sucked into the test tube.
When the test tubes attached with deflated balloons are placed in different glass tumblers containing water heated to different temperatures, the air present inside the test tube is heated by the temperature of the water in which the test tube is placed.
Warm air expands and causes the balloon to inflate, thereby increasing the volume of air inside the balloon.
The extent of inflation depends upon the temperature of water. Maximum expansion is observed in the balloon attached to the tube placed in water that has the highest temperature.
The temperature of test tube II is the highest. Therefore, the volume of air inside the balloon attached to this test tube will be the maximum.
The temperature is least in test tube III. Therefore, the volume of air inside the balloon attached to this test tube will be the minimum.
The temperature in test tube I is between that of test tubes II and III. Thus, the volume of air inside the balloon attached to test tube I is less compared to the balloon attached to II and greater in comparison to the balloon attached to test tube III.
