SEPARATION OF SUBSTANCES

SEPARATION OF SUBSTANCES

PURE SUBSTANCES ARE THOSE WHICH CONTAIN ONLY ONE KIND OF CONSTITUENTS PARTICLES, MOLECULES AND COMPOUNDS.

FOR EX: IRON ( Fe), Copper (Cu), Salt, Water ( H₂O)

ONE KIND OF PARTICLE MEANS

PURE SUBSTANCE

Multiple Choice

THOSE SUBSTANCES WHICH CONTAIN ONLY __________ OF CONSTITUENTS PARTICLES, MOLECULES AND COMPOUNDS ARE CALLED PURE SUBSTANCE.

• ONE KIND

• PURE SUBSTANCE

• HOMOGENEOUS MIXTURE

• HETEROGENEOUS MIXTURE

UNWANTED PARTICLES MEANS

IMPURITIES

Multiple Choice

Impurities are the _____________ present in a substance making impure.

• Pure substance

• Mixture

• unwanted particles

• Homogeneous mixture

MORE THAN ONE KIND OF PARTICLES MEANS

IMPURE SUBSTANCE

Multiple Choice

______________ substances containing more than one type of constituents particles.

• Pure substance

• Mixtrues

• Particles

• Impure substances

MORE THAN ONE COMPONENT IN ANY RATIO

MIXTURE

Multiple Choice

Mixture which contains more than one component mixed in

• any ratio

• Impure substances

• Pure substance

• Heterogeneous mixture

PARTICLES CANNOT BE SEEN MEANS

HOMOEGENEOUS

Multiple Choice

______________________ in which particles of the substances present can not be seen.

• Heterogeneous

• Homogeneous

• Impurities

• Impure substances

PARTICLES CAN BE SEEN MEANS

HETEROGENEOUS

Multiple Choice

Heterogeneous mixture in which particles of the substances present

• can be seen easily

• Homogeneous

• Mixture

• Impure substance

SOLUTION IS HOMOGENEOUS

COMPLETELY DISSOLVED

Multiple Choice

When a substance is dissolve completely in a liquid ( sugar in water). A homogeneous mixture is formed, it is known as __________.

• Solution

• Homogeneous

• Heterogeneous

• Impure substance

Multiple Choice

A solution in which no more soluble ( solute) substance can be dissolved at room temperature is called ___________________ solution.

• Unsaturated

• Mixture

• Saturated

• Impure substance

Hand picking method ..............Separation of grains from dirt particles

Multiple Choice

____________________ is the method is used for separating small particles of dirt stone husk etc from the grains of wheat , rice pulses etc.

• Winnowing

• Decantation

• Churning

• Hand picking