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प्रश्न
Fill in the following blanks with suitable words :
The separation of liquids by fractional distillation is based on the difference in their .....................
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उत्तर
The separation of liquids by fractional distillation is based on the difference in their boiling points.
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संबंधित प्रश्न
Fill in the blank :
The substances which can flow are called ________
Fill in the blank
All matter is made up of tiny particles called ______
Name one element, one compound and one mixture.
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Draw a flow-chart for the schematic representation of different types of matter.
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.
- What type of substance could X be ? Name one substance like X.
- What type of substance could Y be ? Name one substance like Y.
- What type of substance could Z be ? Name one substance like Z.
- Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
- Name the three groups into which all the substances like Y are divided on the basis of their properties.
In what respects does a true solution differ from a colloidal solution ?
How will you test whether a given solution is a colloidal solution ?
Define Aerosol Give one example.
What is a colloid ? Give two examples of colloids (or colloidal solutions)
One of the following is a solid foam. This one is :
Which of the following is not an emulsion ?
Which of the following represents the solubility of sugar in water at 20°C ?
How would you separate iodine from a mixture of iodine and common salt ?
How will you separate a mixture of iron filings and powdered carbon ?
Which one of the following scrap metal cannot be separated by magnetic separation ?
Explain the meaning of the term ‘matter’.
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Intermolecular space is maximum in ______.
