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प्रश्न
Give reason.
While purchasing canned food, its expiry date should be checked.
उत्तर
While purchasing canned food, their expiry date should be checked because an expiry date indicates for how long a canned food is safe for consumption. Canned foods with expired dates are not considered worth consumption as they could affect your health. They might get contaminated with microorganisms like bacteria or may have no nutritional value left after their expiration.
संबंधित प्रश्न
State whether the following is physical or chemical changes.
Melting of wax —
State whether the following is physical or chemical changes.
Boiling of an egg —
Tick (√) the correct alternative from the choice given for the following statement
Burning is a
True or false?
In a chemical change, rearrangement of molecules and atoms involves some energy changes.
Distinguish between the following.
Natural change and man-made change
Under which different types can the following changes be classified?
Conversion of milk into yogurt.
Fill in the blanks with the appropriate words of the statement given below:
Chemical changes may involve exchange of energy in the form of __________ and _________.
How can a change occur in a substance?
Some changes are listed in the following table. For each change, write in the blank column, whether the change can be reversed or not.
| S. No. | Change | Can be reversed (Yes/No) |
| 1. | The sawing of a piece of wood | |
| 2. | The melting of ice candy | |
| 3. | Dissolving sugar in water | |
| 4. | The cooking of food | |
| 5. | The ripening of a mango | |
| 6. | Souring of milk |
Cut vegetables turn brown when exposed to air, this is due to ______.
