Download App

Matter in Our Surroundings — Science STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings3 Marks
Question
Why does our palm feel cold when we put some acetone (or perfume) on it?
✓

Answer

Acetone (or perfume) is volatile in nature. When we apply it to our palm, we feel cold. This happens due to the fact that to change from liquid to the vapour state, acetone requires latent heat of vaporization. Acetone takes this latent heat of vaporization from the hand due to which the palm loses heat and feels cold.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Question Answer (3 Marks)" from Matter in Our Surroundings→Matter in Our Surroundings — all question types→Science STD 9 question papers→Maharashtra Board STD 9 question papers→Maharashtra Board question paper generator→

Similar questions

The longitudinal waves travel in a coiled spring at a rate of 4m/s. The distance between two consecutive compressions is 20cm. Find:
  1. Wavelength of the wave.
  2. Frequency of the wave.
→
Draw a flow diagram of the processes involved in obtaining gases like nitrogen, oxygen and argon from air.
→
Explain how a rocket works.
→
Explain why, when a person stands on a cushion, the depression is much more than when he lies down on it.
→
How is scrap iron separated from a heap of waste materials in factories?
→
Calculate the acceleration due to gravity on the surface of a satellite having a mass of $7.4 \times 10^{22} kg$ and a radius of $1.74 \times 10^6 m\left( G =6.7 \times 10^{-11} Nm ^2 / kg ^2\right)$. Which satellite do you think it could be?
→
A $10\ g$ bullet travelling at $200\ m/s$ strikes and remains embedded in a $2\ kg$ target which is originally at rest but free to move. At what speed does the target move off?
→
What is the difference between gravitational potential energy and elastic potential energy? Give one example of a body having gravitational potential energy and another having elastic potential energy.
→
Describe how the gravitational force between two objects depends on the distance between them.
→
A cyclist is travelling at $15\ ms^{-1}$. She applies brakes so that she does not collide with a wall $18m$ away. What deceleration must she have?
→