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प्रश्न
What are the observations and conclusions when tap water is boiled and evaporated in watch glass?
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उत्तर
When tap water is boiled and evaporated:
Observations:
- A number of concentric rings of solid matter are seen on the watch glass after evaporation of tap water.
Conclusion:
- Tap water contains dissolved salts, minerals and impurities.
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संबंधित प्रश्न
Give two example of Solvent other than water.
Give reason for Table salt becomes moist during rainy season.
Discuss the importance of water as a solvent for our body .
How is air dissolved in water different from ordinary air?
Explain why:
Ice at zero degrees centigrade has greater cooling effect than water at 0oC.
Explain the term:
Solute
Explain why:
Lakes and rivers do not suddenly freeze in the winters.
Give a reason why water is called a ‘universal solvent’ but, an alkali is not.
State why ‘Water is considered a universal solvent’. Give the reason for the same.
State whether the following statement is true or false.
Water can be separated from salt by evaporation.
