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Biomolecules — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBiomolecules2 Marks
Question
Which two changes does a chemical compound undergo? Explain each with example.
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Answer

Chemical compounds undergo following two types of changes:

Physical changes: are those in which shape of a molecule or a substance changes without breaking of bonds or change in state of matter, e.g., melting of ice in water.

Chemical changes: are those changes in which the bonds are broken and new bonds are formed. e.g.,

  1. $\text{Ba(OH)}_2\ \ \ \ \ +\ \ \ \ \ \text{H}_2\text{SO}4\xrightarrow{\ \ \ \ \ \ \ }\text{BaSO}_4 + 2\text{H}_2\text{O}\\\text{(inorganic chemical reaction).}$

  1. Hydrolysis of starch into glucose (organic chemical reaction).

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