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प्रश्न
Choose the most appropriate answer
Which of the following property is not shown by compounds?
विकल्प
They are heterogeneous.
They are homogeneous
They have definite molecular formulae.
They have fixed melting and boiling points
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उत्तर
They are heterogeneous.
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संबंधित प्रश्न
Differentiate between:
pure and impure substances
Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method :
Iron from sulphur
Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.
Sodium chloride and potassium nitrate
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 – A solid-liquid mixture containing – a soluble solids in the liquid component
State any one method – to separate the following mixtures – A liquid-liquid mixture containing – two miscible liquids having different boiling points.
Very Short Answer Type Question:
You are given a mixture of salt and sand. Can you separate them by picking?
Very Short Answer Type Question:
What types of material can we separate by using handpicking?
What is meant by separation?
You are provided with a mixture of salt, sand, oil and water. Write the steps involved for the separation of salt, sand and oil from the mixture by giving an activity along with the diagram.
