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प्रश्न
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
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उत्तर
If a mixture contains iron fillings as one of the constituents, it can be separated by using a magnet.
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संबंधित प्रश्न
What are the two conditions for the interconversion of states of matter ?
Fill in the blank
Liquids have a definite ______
Name a non-metal which is a good conductor of electricity.
Name the property which enables metals to be drawn into wires.
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is :
The element which is not common between the compounds called baking soda and soda ash is
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.
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
Choose one term from the following which includes the other three :
aerosol, emulsion, colloid, sol
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
What is meant by a solution?
What is a suspension ? Give two examples of suspensions.
How is the impurity of iron present in several substances removed in industries ?
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
Why wires cannot be drawn from materials such as stone or wood?
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.
Liquids have ______.
Intermolecular space is maximum in ______.
Evaporation does form bubbles.
Define the term matter.
