Which among the following is not a chemical change ?

Melting of ice

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Carbon cycle

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Dehydration of substances

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Fermentation of substances

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Solution

The correct option is A Melting of ice
Melting is a physical process that results in the phase transition of a substance from a solid to a liquid. The internal energy of a substance is increased, typically by the application of heat or pressure, resulting in a rise of its temperature to the melting point, at which the ordering of ionic or molecular entities in the solid breaks down to a less ordered state and the solid liquefies.

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Similar questions

Q. Which of these is a chemical change?

(a) A substacne with different chemical properties is formed.
(b) A substance in a different state but similar chemical properties is formed.
(c) The molecules of the substances do not undergo any change.
(d) A substance with a different shape and size but similar chemical properties is formed.

Consider the following statements:

(i) Chemical changes are irreversible.

(ii) Chemical changes produce new substances.

(iii) Chemical changes does not involve large energy changes.

Which among these are incorrect?

Q. Assertion :Chemical properties are those properties which change the chemical nature of matter. Reason: Melting point is not a chemical property.

Q. Which of the following is not a feature of chemical change?

(I) Original substance can be obtained by simple physical methods.
(II) It is a temporary change.
(III) The new substances formed have properties different from those of the reacting substances.

Match the following:
$\begin{matrix} 1. C h e m i c a l c h a n g e & i . W a t e r 2. P h y s i c a l c h a n g e & i i . S u g a r i n w a t e r 3. P u r e s u b s t a n c e & i i i . C o o k i n g f o o d 4. H o m o g e n e o u s m i x t u r e & i v . M e l t i n g o f i c e \end{matrix}$

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