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प्रश्न
Ripening of fruits is a desirable change.
उत्तर
Ripening of fruits is a desirable change because this change is beneficial for the mankind and we desire to happen.
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संबंधित प्रश्न
Give two reasons to justify water at room temperature is a liquid.
The boiling point of alcohol is 78° C. What is this temperature on Kelvin scale ?
What is meant by saying that the latent heat of fusion of ice is 3.34 × 105 J/kg ?
How does perspiration or sweating help keep our body cool on a hot day ?
Define the term 'latent heat of vaporisation' of a liquid. What is the value of the latent heat of vaporisation of water ?
On converting 25°C, 38°C and 66°C to Kelvin scale, the correct sequence of temperatures will be :
Define: Brownian movement
Differentiate between: Solidification and condensation
Write whether the following statement is true or false:
All solids, on heating, first change to the liquid and then to the gaseous state always
Name the phenomenon which causes the following changes:
Disappearance of camphor when exposed to air
Give two examples of the following:
Substances which sublime.
Explain the term freezing
Riya pours some water from her bottle into another bottle. Does it change the shape of the water?
What is it made from? Why?
A sickle to cut sugarcane.
What will happen if....? And why?
A knife is made of wood.
Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.
Are any new products formed during the above process.
Fill in the blank with the correct word of the statement given below:
Sublimation is _______ a change of state of matter.
Draw a labelled schematic diagram representing the terms (a) to (e) involved in the inter-conversion of matter.
Give the reason for the following
On heating a sublimable solid, the molecules break free & escape from the surface of the solid directly into vapour.
