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प्रश्न
Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.
Can the change be reversed or is it irreversible?
उत्तर
The change cannot be reversed. It is irreversible.
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संबंधित प्रश्न
What is the physical state of water at 100°C.
Give two reasons to justify water at room temperature is a liquid.
Tick (√) the correct alternative from the choice given for the following statement.
When we add water to the following substances, which one will show a chemical change?
Tick the most appropriate answer.
Chemical changes involve
What is the name of the process in which a gas turns directly into a solid ?
Why does the temperature remain constant during the melting of ice even though heat is supplied continuously ?
Why does steam cause more severe burns than boiling water ?
Define 'melting point' of a substance ? What is the melting point of ice
The conversion of a solid into vapours without passing through the liquid state is called :
On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be :
Define the following terms: Melting point
Define the following terms: Boiling point
Name the phenomenon which causes the following changes:
Conversion of ice into water
Explain the term vaporization
Explain the term boiling point
State which of the following statement is true or false. If false write the correct statement.
Atoms/molecules in gases move only about their own positions.
In the paragraph below, write ‘solid’, ‘liquid’ or ‘gas’ in each of the brackets depending on the substance referred to just before.
On a bright sunny day, Riya and Gargi are playing with a ball ( ) in the park. Gargi feels thirsty. So, Riya brings tender coconut water ( ) for her. At the same time, a strong breeze ( ) starts blowing and it also begins to rain ( ). They run back into the house ( ), change their clothes ( ), and then their mother gives them a cup ( ) of hot milk ( ) to drink.
What is it made from? Why?
A sickle to cut sugarcane.
