MEDIUM
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Crystallisation is based on the?

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Important Questions on Matter and its States

EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change

Destructive distillation of coal gives:
I. Coal gas.
II. Petroleum.
III. Ammonium liquor.
IV. Coal tar.

MEDIUM
Science & Pedagogy>Chemistry>Matter and its States>Physical Change

Consider the following statements and choose the correct option:
Statement I: Conversion of blue copper sulphate to black cupric oxide on heating is a physical change.
Statement II : A change in which chemical composition does not change is called physical change.

EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
Fractional crystallisation is carried out to separate a mixture of:
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
Select the physical change from the following _____.
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
With the increase of pressure, the boiling point of water _____.
HARD
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
Latent heat of vaporization refers to_____.
MEDIUM
Science & Pedagogy>Chemistry>Matter and its States>Physical Change

Which of the following is a physical change?

HARD
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
Which of the following methods is suitable for preventing an iron frying pan from rusting?
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
Property of sublimation is found in _____.
MEDIUM
Science & Pedagogy>Chemistry>Matter and its States>Physical Change

Consider the following factors on which a phenomenon (X) depends. By studying all the given factors, choose the option which correctly describe phenomenon (X).

1. Surface area 2. Temperature 3. Humidity 4. Wind speed

The phenomenon (X) is _____.

EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
Water form by melting of ice is an example of _____.
MEDIUM
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
When the molecules of liquid migrate from the surface of a liquid into the air without heating the process is called ____.
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
The melting points (in undefined) of sulphur (S), aluminium (undefined) and iron (undefined) are undefined, undefined and undefined, respectively. Which one of the following is correct? 
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
Which of the following is not a physical change?
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
A mixture of ethyl alcohol and water can be separated into individual components by _____.
MEDIUM
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then a small amount of hot water added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are _____.
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
In which step of the water cycle does liquid water transform into gas?
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
When the fermentation of fructose results in the bitter product mannitol, the fermentation is sometime termed as-
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
Steam distillation is based on the fact that vaporisation of organic liquid takes place at _____.
EASY
Science & Pedagogy>Chemistry>Matter and its States>Physical Change
The change of a solid into vapour directly, is called: