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प्रश्न
The three important metalloids are.............................. and ..........................
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उत्तर
The three important metalloids are boron, silicon, and germanium.
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संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
The inter-molecular space is maximum in
Fill in the blank :
The state of matter with definite volume and definite shape is called______
Define the following term of Matter .
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
State whether the following statement is true or false :
Bread is an example of solid foam.
Which of the following can be called a suspension ?
What is the difference between colloids and suspensions ?
Name the process by which the various gases of the air are separated.
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
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 .......................
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
Describe a method to separate a mixture of camphor and sand.
How will you separate a mixture of iron filings, chalk powder and common salt ?
Pure copper sulphate can be obtained from an impure sample by the process of :
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
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.
Intermolecular space is maximum in ______.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
