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प्रश्न
True or False. If false, give the correct answer.
Taking a glass of water and freezing it by placing it in the freezer is a chemical change.
विकल्प
True
False
उत्तर
False
Taking a glass of water and freezing it by placing it in the freezer is a physical change
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संबंधित प्रश्न
How would you show that setting of curd is a chemical change?
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Miscible liquids having slightly different boiling points can be separated by the
- evaporation
- distillation
- fractional distillation
- sedimentation
FILL IN THE BLANK
The new substances formed during a chemical reaction are called the ..................
What are chemical reactions?
Write true or false :
Hydrogen sulphide has rotten egg smell .
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
What do you observe when HCI is passed through a silver nitrate solution.
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Which of the following is/are true when milk changes into curd?
- Its state is changed from liquid to semi-solid.
- It changes colour.
- It changes the taste.
- The change cannot be reversed.
Choose the correct option from below:
Define the following term:
Chemical change
