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प्रश्न
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
विकल्प
True
False
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उत्तर
False. Because alcohol is separated from the mixture of alcohol and water by distillation.
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संबंधित प्रश्न
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
Liquids have definite volume but do not have definite shape.
Fill in the blank :
The substances which can flow are called ________
Name the terms for the change of a solid into liquid.
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Name a non-metal which is a good conductor of electricity.
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
Which one of the following is not a metalloid ?
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
Out of a colloid, solution and a suspension :
which one has the largest particles ?
What is the most common way of expressing the concentration of a solution ?
Choose the correct answer.
A 15% alcohol solution means :
Define Aerosol Give one example.
What is a suspension ? Give two examples of suspensions.
Naphthalene can be separated from sand :
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.
______ is a smallest particle.
A standard sheet of paper is about ______ of atoms thick
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
