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प्रश्न
You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labelled diagram.
उत्तर
A mixture of naphthalene and ammonium chloride can be separated as follows :
Step-1: Put the mixture in a beaker and add water to it. Stir with a glass rod. Ammonium chloride is soluble in water gets dissolved leaving behind the insoluble naphthalene.
Step-2: Filter the solution. Naphthalene remains on the filter paper while ammonium chloride is obtained as filtrate.
Step-3: Evaporate the filtrate to get back ammonium chloride.
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संबंधित प्रश्न
Name the three states of matter and define them.
Give two examples of the following:
Substances which do not change their states.
Define the following term of Molecule .
Write your observation and conclusion for the following,
When a small stone is gently dipped into a glass filled with water.
Write true or false for each statement. Rewrite the false statement correctly.
If the intermolecular space is more than the intermolecular force will be weaker.
Each of the three states of matter has mass. Explain with the help simple experiments – that each state of matter has mass.
Give a reason why –
Solids have a definite volume & a definite shape.
Give a reason why:
Gases have no definite volume and no definite shape.
Give a reason for the following:
Liquids have one free upper surface only.
The Cow and Birds are nonliving things.
