EASY
Earn 100

______ is a process used quite often in the dairy industry.

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Important Questions on Matter: Elements, Compounds and Mixtures

EASY
On heating camphor in a porcelain dish it got mixed in air without melting. This phenomenon is known as
EASY
Which of the following contain five molecules of water of crystallisation?
HARD

At a refinery, petroleum is separated into several components by a process called fractional distillation using a fractionating column. Which of the following statement is incorrect about the process?
(I) Temperature decreases from the bottom to the top of the column
(II) At each level in the column only one compound is collected
(III) The fraction collecting at the top of the column is less volatile
(IV) The fraction with the highest boiling point condenses first and gets collected near the base of the fractionating column.

HARD
To obtain toned and double toned milk from full-cream milk we can 
EASY
Cream is separated from milk by _____. (centrifugation/winnowing)
HARD

Which of the following statements is/are incorrect?

I. Centrifugation method can be used to separate butter from cream.
II. Coloured component of blue ink can be separated by evaporation.
III. Chromatography can be used to detect drugs in blood.
IV. Camphor can be separated from salt by crystallisation.

MEDIUM
The technique used for the separation of colloidal particles is known as?
MEDIUM
When a mixture is rotated very fast, the_____ particles are forced to go to the bottom of the centrifuge and the lighter particles stay at the top.
MEDIUM
The technique which is used to separate particles of a solid suspended in a liquid quickly is called: 
MEDIUM
Assertion: Cream is separated from milk by centrifugation
Reason: Milk is a heterogeneous mixture
EASY
The separation of denser particles from lighter particles done by rotation at high speed is called _____.
HARD
The separation technique which involves the difference in their densities is _____.