Chemical changes
Chemical Changes
Chemical Change:
A chemical change occurs when two or more chemical substances react to produce new substance with a different set of properties. It is permanent which cannot be reversed. Examples:
When a new substance is formed after the change, it is called __________________change. | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are correct : (a) On cutting brinjal the atmospheric oxygen react to produce a brown colour pigment “melanin” that cause browning of the surface. (b) The chemical change is irreversible and permanent. (c) The enzymes present in these micro organisms convert milk sugar (lactose) to lactic acid. | |||
| Right Option : D | |||
| View Explanation | |||
When Magnesium is burnt, heat and light are produced .The burning of Magnesium is a : | |||
| Right Option : C | |||
| View Explanation | |||
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