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प्रश्न
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
विकल्प
True
False
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उत्तर
False.
Matter can exist in different states.
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संबंधित प्रश्न
What is the scientific name of particles which make up mater?
During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of :
State two physical properties on the basis of which metals can be distinguished from non-metals.
Draw a flow-chart for the schematic representation of different types of matter.
Out of a colloid, solution and a suspension :
which one has the largest particles ?
Name the different types of solutions. Give one example of each.
Define solubility of a substance. How does it vary with temperature ?
What is the effect of temperature on the solubility of solids in liquids ?
Name the process which can be used to recover salt from an aqueous salt solution.
Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.
How will you separate a mixture of iron filings, chalk powder and common salt ?
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
The dyes present in fountain pen ink can be separated by the technique of :
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when, liquids B and C are mixed, they form two separate layers :
(a) Which process will you use to separate a mixture of A and B ?
(b) Which method will you use to separate a mixture of B and C ?
(c) Name the liquids which would behave like (i) A (ii) B and (iii) C.
The non S I and S I units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity:
| (A) | (B) | ||
| (a) | degree celsius | (i) | kilogram |
| (b) | centimetre | (ii) | pascal |
| (c) | gram per centimetre cube | (iii) | metre |
| (d) | bar | (iv) | kelvin |
| (e) | milligram | (v) | kilogram per metre cube |
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
The phenomenon of Evaporation takes place at the ______ of a liquid.
Give an example of a molecule.
Define the term matter.
