Which one is a physical change? (1) Burning of S in air (2) Burning of C in air (3) Conversion o

step 1 in this question we are asked which one is the physical change so we are asked physical change i

Which one is a physical change? (1) Burning of S in air (2)...

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Key Concepts

Physical Change

A physical change is an alteration in the state, shape, or form of a substance that does not change its chemical composition. Such changes can include phase transitions like melting, freezing, or changes between different crystalline forms, and they are often reversible.

Chemical Change

A chemical change entails a process where the substance undergoes a chemical reaction, resulting in the formation of one or more new substances. These changes involve breaking and reforming chemical bonds and are usually accompanied by energy changes such as the emission of heat or light.

Allotropy

Allotropy refers to the existence of an element in more than one form in the same physical state, where the different forms have distinct physical properties due to differences in their atomic or molecular structures. The conversion between these forms, such as the transformation from one allotrope to another, typically involves a rearrangement of atoms without altering the elemental composition, and can be considered a physical change when no new substances are produced.

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