Subject :NSO Class : Class 5
Read the experiment and answer
In three 500 mL beakers, Ahmed put melted ice water, room-temperature water, and hot water. He put a thermometer into each beaker and recorded the temperature. He carefully placed a single drop of blue food coloring in the center of the surface of the water in each beaker. He planned to take observations at 5 minutes, 10 minutes, 20 minutes, and 30 minutes.
Which of the following statements can be explained by Ahmed's experiments ?
(B) The melting of ice in hot and warm water
(C) The effect on volume of heating water
(D) The changing of phase, or state, from liquid to gas.
it is correct because the perfume is in solid form but when we spray it is in liqid form
Ans 1:
Class : Class 5
it is correct
Ans 2:
Class : Class 7
A
Ans 3:
Class : Class 5
it is correct because the perfume is in lid but when we spray it is in gaseous form
Ans 4:
Class : Class 4
I think question is incorrect as the experiment has two parts to it one is Newtons law of thermal cooling and the solubility and temp relation .The blob of food colour will disperse basis the varied temperature and rate of change of temperature. The question is not for the intended students and the options are wrong