Fill in the following blanks with suitable words:
The separation of liquids by fractional distillation is based o the difference in their __________.
The separation of liquids by fractional distillation is based o the difference in their __________.
Question types
Is Matter Around Us Pure? question types
266 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
266
Questions
7
Question groups
5
Question types
01
Fill In The Blanks.
14 Q→02MCQ
47 Q→03true or false
4 Q→04Question Answer (2 Marks)
60 Q→05Question Answer (1 Marks)
92 Q→06Question Answer (3 Marks)
22 Q→07Question Answer (5 Marks)
27 Q→Sample Questions
Is Matter Around Us Pure? questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
View full solution →
Fill in the following blanks with suitable words:
The gases of air can be separated by fractional distillation of liquid air because they have different ___________.
The gases of air can be separated by fractional distillation of liquid air because they have different ___________.
Fill in the following blanks:
Milk is a ________ solution but vinegar is a ________ solution.
Milk is a ________ solution but vinegar is a ________ solution.
Fill in the following blanks with suitable words:
Miscible liquids are separated by __________.
Miscible liquids are separated by __________.
Fill in the following blanks:
A colloid is a _________ mixture and its components can be separated by the technique known as __________.
A colloid is a _________ mixture and its components can be separated by the technique known as __________.
Which of the following are homogeneous in nature?
$i.$ Ice
$ii.$ Wood
$iii.$ Soil
$iv.$ Air
$i.$ Ice
$ii.$ Wood
$iii.$ Soil
$iv.$ Air
- A$(i)$ and $(iii)$
- B$(ii)$ and $(iii)$
- ✓$(i)$ and $(iv)$
- D$(iii)$ and $(iv)$
Answer: C.
View full solution →The property/ properties which enable copper metal to be used for making electric wires is/ are:
- ACopper metal is malleable and ductile.
- BCopper metal is a good conductor of electricity.
- ✓Copper metal is ductile and has low electrical resistance.
- DCopper metal is sonorous and an excellent conductor of electricity.
Answer: C.
View full solution →On the basis of composition of matter, milk is considered to be:
- AA pure substance.
- ✓An impure substance.
- CAn element.
- DA compound.
Answer: B.
View full solution →“Is malleable and ductile” best describes:
- AA solution.
- ✓A metal.
- CA compound.
- DA non-metal.
Answer: B.
View full solution →One of the following does not show Tyndall effect. This one is:
- ASoap solution.
- BInk.
- ✓Sugar solution.
- DStarch solution.
Answer: C.
View full solution →State whether the following statements are true or false:
What type of colloids are bread and sponge?
- Bread is an example of solid foam.
- Sponge is an example of solid sol.
What type of colloids are bread and sponge?
Name one pair of liquids which can be separated by using a separating funnel.
State whether the following statement is true or false:
Milk is a pure substance.
Milk is a pure substance.
State whether the following statements are true or false:
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
What will happen if a saturated solution is: (i) heated, and (ii) cooled?
Define:
- Solute
- Solvent
What is meant by (i) homogeneous mixtures, and (ii) heterogeneous mixtures? Give two examples of homogeneous mixtures and two of heterogeneous mixtures.
What is a suspension? Give two examples of suspensions.
How will you distinguish a colloid from a solution?
Name the source from which nitrogen and oxygen are obtained on a large scale.
Name a metal:
Which has a low melting point.
Which has a low melting point.
What are pure substances? Give two examples of pure substances.
Which of the following contains less solute at a given temperature and pressure?
Unsaturated solution or Saturated solution.
Unsaturated solution or Saturated solution.
Name the process which can be used to purify an impure sample of copper sulphate.
How will you separate a mixture of sodium chloride and sand?
How will you separate a mixture of cooking oil (groundnut oil) and water?
Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.
How is cream separated form milk?
Which method is better for recovering sugar from sugar solution: evaporation or crystallization? Give reason for your answer.
How will you separate a mixture of common salt, sulphur powder and sand?
A mixture contains water, kerosene and sand. How will you separate this mixture?
List five characteristics by which compounds can be distinguished from mixtures.
Give the main differences between physical changes and chemical changes.
How will you separate common salt, sand and iron filings from their mixture?
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