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प्रश्न
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
उत्तर
No, it is not a chemical change. We just separated the skin of the banana and there is no change is its composition..
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संबंधित प्रश्न
What are (i) positive catalysts and (ii) negative catalysts? Support your answer with one example for each of them.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer
Which of the following is a reducing agent?
- oxygen
- chlorine
- hydrogen
- none of these
True or false
New substances are formed in a chemical change.
When electric current is passed through acidulated water ______ of water takes place.
Complete and balance the following reaction:
\[\ce{Pb(NO3)2 ->[\Delta]}\]
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
Burning of paper is a ______ change.
Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.
When carbon dioxide is passed through lime water ______.
Acid rain is a result of ______.
