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प्रश्न
How is sodium chloride different from its constituent elements ?
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उत्तर
The properties of sodium chloride are completely different from those of sodium and chlorine. Sodium is a soft, highly reactive metal. Chlorine is a poisonous non-metallic gas while sodium chloride is a very useful non poisonous compound which is added to our food to get minerals and also to add taste to it.
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संबंधित प्रश्न
Choose the most appropriate answer
Which of the following property is not shown by compounds?
Fill in the blanks.
Immiscible liquids are separated by using a ________.
Write true or false
Handpicking can be used as a separation technique if the particle size of the constituents of the mixture is the same.
How is distillation method different from evaporation?
Match the ideal method of separation of components in a mixture in List I with the appropriate process in List II.
| List I | List II |
| 1. Sand from a mixture of sand and water | A: Separating funnel |
| 2. kerosene from a mixture of kerosene water | B: Sublimation |
| 3. Alcohol from a mixture of methyl alcohol and water | C: Filtration |
| 4. Naphthalene from a mixture of naphthalene and lead chloride | D: Distillation |
| 5. Pure water from impure water | E: Fractional distillation |
State any one method – to separate the following mixtures – Two solid mixtures one of which – dissolves in a – particular solvent and other does not
Explain with a diagram the process used to – separate the following substance from the given mixture.
Potassium nitrate from a mixture of – potassium nitrate & potassium chlorate.
Select the correct answer from the choice given below to complete the sentence :
The reactive element from the two monoatomic elements is _____________.
Visit a nearby paddy field and rice mill and note down the different separating techniques used there. Is technology replacing some traditional practices?
Match the following
| Column A | Column B | ||
| 1. | Separation of salt from saltwater | a. | Magnetic separation |
| 2. | Separation of tea leaves from tea extract | b. | Evaporation |
| 3. | Separation of sand and iron filings | c. | Churning |
| 4. | Separation of butter from curds | d. | Filtration |
