Chemistry
Which of the following is a physical change?
- Cooking of food
- Formation of curd
- A glass cut into pieces
- Boiling of eggs
Phy & Chem Changes
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Answer
A glass cut into pieces
Reason — A physical change is a change in which no new substance is formed and the chemical composition of the original substance remains the same, even though some of its physical properties like colour, state, shape, size, etc. may change. A glass cut into pieces will have different size and shapes, but the chemical composition remains the same.
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Related Questions
Burning of a piece of paper into ash is a:
- periodic change
- natural change
- reversible change
- permanent change
Which of the following is a slow change?
- Rusting of iron
- Burning of wood
- Burning of a cracker
- Switching on a fan
In a chemical change :
- a new substance is formed
- energy is either released or absorbed
- the change is irreversible
- all of the above
Assertion (A): The changes which result in the formation of new substances with entirely different composition and properties are called chemical changes.
Reason (R): Chemical changes are permanent and irreversible.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false
- A is false but R is true.