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प्रश्न
Name the technique that you use if only the solid component of a solution is required.
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उत्तर
Evaporation.
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संबंधित प्रश्न
Give one example for the following types of mixtures :
misicible liquids
Differentiate between:
Homogenous and heterogenous substances
Find the atomicity of the Following molecule:
Dinitrogen Oxide
Fill in the blank
The most abundant element in the atmosphere is _______.
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – a gas with a pungent, choking odour which is lighter than air
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Give the name of the radical - CO3
Select the correct answer from the choice given below.
The type of molecule- bromine
Select the correct answer from the choice given below.
A group of atoms of elements
Write the names of elements from the following symbol:
Si
Select the correct answer from the choice in the bracket.
The least reactive metal.
‘An atom is the basic unit of an element’. Draw a diagram of an atom – divisible as seen today.
Select the correct answer from A, B, C, D & E for the statement given below :
A metalloid.
Match the separation of components in List I with the most appropriate process in List II.
| List I | List II |
| 1. Naphthalene from naphthalene & sodium chloride. | A: Separating funnel |
| 2. Cream from milk. | B: Sublimation |
| 3. Kerosene oil from kerosene oil & water. | C: Boiling |
| 4. Lead nitrate from an aqueous solution of lead nitrate. | D: Centrifugation |
| 5. Ammonia from an aqueous solution of ammonia. | E: Distillation |
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
What is the Latin name of Sodium?
Higher-Order Thinking questions:
Why is hydrogen considered an element?
