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Define preference shares. State the merits of raising funds
[
CBSE Class 11 Business Studies
]
(2)
What do you mean by trade barrier
[
Uncategorized
]
(1)
Perioic classification
[
CBSE Class 11 Chemistry
]
(3)
Why is air considered as a mixture and not compound?
[
CBSE Class 9 Social
]
(3)
Draw a flow diagram to show the water purification system in water works
[
CBSE Class 9 Social
]
(2)
How can we obtain different gases from air?
[
CBSE Class 9 Social
]
(2)
A student is given a mixture of naphthalene ball’s powder and common salt
[
CBSE Class 9 Social
]
(2)
How will you separate a mixture of oil and water?
[
CBSE Class 9 Social
]
(2)
Why is crystallisation better than evaporation?
[
CBSE Class 9 Social
]
(2)
Give the applications of chromatography
[
CBSE Class 9 Social
]
(2)
Give the applications of centrifugation
[
CBSE Class 9 Social
]
(2)
State the properties of colloidal solution
[
CBSE Class 9 Social
]
(2)
What is a colloidal solution?
[
CBSE Class 9 Social
]
(2)
State the properties of a suspension
[
CBSE Class 9 Social
]
(2)
State the properties of a solution
[
CBSE Class 9 Social
]
(2)
Distinguish between a physical change and chemical change
[
CBSE Class 9 Social
]
(2)
Give the differences between mixture and compound
[
CBSE Class 9 Social
]
(2)
Why is mixture called impure substance?
[
CBSE Class 9 Social
]
(2)
Explain giving examples the various factors on which rate of evaporation depends
[
CBSE Class 9 Social
]
(2)
Pressure and temperature determine the state of a substance. Explain this in detail
[
CBSE Class 9 Social
]
(2)
With the help of an example, explain how diffusion of gases in water is essential?
[
CBSE Class 9 Social
]
(2)
How is the high compressibility property of gas useful to us?
[
CBSE Class 9 Social
]
(2)
The melting point of ice is 273.16 K. What does this mean? Explain in detail
[
CBSE Class 9 Social
]
(2)
Name the factors that affix l evaporation
[
CBSE Class 9 Social
]
(2)
The temperature at which liquids change into vapours is very high,
[
CBSE Class 9 Social
]
(2)
On a last sunny day, why do people sprinkle water on the roof or open ground?
[
CBSE Class 9 Social
]
(2)
Why arc solids generally denser than liquids and gases?
[
CBSE Class 9 Social
]
(2)
Cotton in solid but it floats on water. Why?
[
CBSE Class 9 Social
]
(2)
State the differences between solid, liquid and gas
[
CBSE Class 9 Social
]
(2)
Why is water liquid at room temperature?
[
CBSE Class 9 Social
]
(2)
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