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प्रश्न
What do you observe when :
an iron nail is kept in tap water for few days
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उत्तर
We observe reddish brown coating on the nail called rust (entirely new substance) is chemical change.
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संबंधित प्रश्न
Give one example that illustrates the following characteristics of a chemical reaction:
Change in state
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Fill in the blank.
Melting of ice is a _______ change.
Explain the following reaction with one suitable example of Displacement reaction.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
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Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
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Give an example of a reaction where the following are involved
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Give an example of a reaction where the following are involved
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Write the chemical reaction where the following changes are observed.
Physical state is changed
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Explain,giving one example of the following chemical changes:
Reversible reaction
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Give a word equation for the following reaction.
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\[\ce{H->H+}\]
Complete the statement by filling in the blank with the correct word:
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