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प्रश्न
Classify the following as a physical or a chemical change.
Butter getting rancid
उत्तर
Chemical change
APPEARS IN
संबंधित प्रश्न
Classify the following as chemical or physical change:
Dissolving common salt in water.
Write short answer.
Give an example of desirable change which can also be undesirable
Write true or false
Earthquake is a desirable change.
Name two reversible changes.
Two chemical substances X and Y combine together to form a product P which contains both X and Y X + Y P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following statements concerning X, Y and P are correct ?
- P is a compound
- X and Y are compounds
- X and Y are elements
- P has a fixed composition
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
State the observations seen, when milk in a dish is kept aside for a few hours or more. Is the change which occurs – a physical change or a chemical change. Give reasons.
State whether the following statements are true or false:
Anaerobic bacteria digest animal waste and produce biogas.
Give two examples for each of the following cases:
Physical changes are reversible.
Give two examples for each of the following cases:
Physical changes which are not reversible.
