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प्रश्न
Fill in the blank.
Melting of ice is a _______ change.
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उत्तर
Melting of ice is a physical change.
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संबंधित प्रश्न
How do the following help in bringing about a chemical change?
pressure.
Define catalyst.
Name the type of chemical reaction shown by the following equation :
Fe2O3 + 2Al → Al2O3 + 2Fe
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
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The spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.
What is a chemical reaction?
Give an example of a reaction where the following are involved
Heat
What do you observe? When
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Name the following:
The products obtained during ‘photosynthesis’ – which is a chemical change.
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
Give a balanced equation for the conversion of an ammonium salt to a basic gas.
Chemical change is a temporary change.
State whether the following statement is true or false:
When a candle burns, both physical and chemical changes take place.
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Can you change rust back into iron by some simple method?
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What changes do you expect?
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
Write the chemical reaction of baking soda with lemon.
When carbon dioxide is passed through lime water ______.
______ is the chemical name of limestone.
Acid rain is a result of ______.
