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प्रश्न
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
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उत्तर
Miscible liquids are separated by fractional distillation.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Name two processes which provide the best evidence for the motion of particles in matter.
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
Define matter. Give four examples of matter.
What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain during Brownian motion.
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Name a metal which is yellow in colour.
“Is malleable and ductile” best describes :
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.
Which of the following are chemical changes and which physical ? Give reason.
- a glass bottle breaking
- coal burning in air
- making a cake
- wool being knitted into a sweater
Which of the following represents the solubility of sugar in water at 20°C ?
What is the difference between colloids and suspensions ?
Name the process which can be used to purify an impure sample of copper sulphate.
How is the impurity of iron present in several substances removed in industries ?
What is fractional distillation ? What is the use of fractionating column in fractional distillation ?
One of the following does not undergo sublimation. This one is :
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
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 |
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The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
Liquids have ______.
