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प्रश्न
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
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उत्तर
Miscible liquids are separated by fractional distillation.
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संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
What is the other name for impure substances ? Give two examples of impure substances.
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
State any two properties for believing that aluminium is a metal.
Which of the following are compounds ?
- CO
- No
- NO
- Co
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution
Define solubility of a substance. How does it vary with temperature ?
What is a colloid ? Give two examples of colloids (or colloidal solutions)
One of the following represents the solution of solid in a solid. This one is :
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
Name the process by which the various gases of the air are separated.
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?
What difference in the properties of oil and water enable their separation by a separating funnel ?
Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.
Explain how, nitrogen , oxygen and argon gases are separated from air.
Which of the following mixture cannot be separated by using water as the solvent ?
Liquids have ______.
The phenomenon of Evaporation takes place at the ______ of a liquid.
