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6th Grade > Chemistry

SORTING MATERIALS INTO GROUPS MCQs

Total Questions : 100 | Page 4 of 10 pages
Question 31. Which of the following properties is not helpful in making plastic bottles to hold water?
  1.    It should be elastic in nature.
  2.    It should not react with water.
  3.    It should be light and easy to carry.
  4.    Water should not pass through plastic.
 Discuss Question
Answer: Option A. -> It should be elastic in nature.
:
A
The following properties make plastic a good choice for making bottles:
(i) Water should not pass through plastic.
(ii) It should not react with water.
(iii) It should be lighter and easy to carry.
While being elastic in nature does not serve the purpose for holding water, as it would make the bottle difficult to handle.
Question 32. Which of the following is made of more than one material?
  1.    Computers
  2.    Copper shavings
  3.    Plastic Bottles
  4.    Iron rods
 Discuss Question
Answer: Option A. -> Computers
:
A
A Computer is made of different materials like plastic, glass and metal etc. Whereas the other options like iron rods and tyres and bottle are each made of the same substances individually.
Question 33. The objects which do not allow the light to pass through them are called:
  1.    Opaque
  2.    Transparent
  3.    Transitional
  4.    Translucent
 Discuss Question
Answer: Option A. -> Opaque
:
A
Opaque objectsdo not allow the light to pass through them.
Example:- Wood, Gold, etc.
Tranparent objects allow the light to pass through them while translucent objects partially allow the light to pass through them.
Question 34. Materials are classified as liquids if they have a specific shape.
  1.    True
  2.    False
  3.    opaque
  4.    conductor
 Discuss Question
Answer: Option B. -> False
:
B
-Liquids do not have definite shapes; theytake the shape of the container they are stored in.
-Theyhavedefinite volume.
-The particles of liquids are loosely packed compared toparticles in solids
-They can be compressed to a small extent.
Question 35. Goutham was unable to complete the assignment given to him. He had to complete the following table.
The objects that he should choose are?
MaterialObjects made of these materialsWoodChair, table, ploughsPaperBooks, notebooks, toysLeather
  1.    Purse, bag, calendar 
  2.    Purse, bag, phone
  3.    Bag, wheel, pen
  4.    Purse, jacket, belt 
 Discuss Question
Answer: Option D. -> Purse, jacket, belt 
:
D
Belts, purse, and jacket -all of these are made ofleather.
Question 36. All objects can be differentiated based on their shapes.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
:
B
Not all objects can be differentiated based on shape. Neither doall objects with the same shape have similarfunctions. Objects can also be segregated on the basis of colour, function, size, density, etc.
Question 37. When the oil is spread on paper then the objects on the other side:
  1.    can be seen clearly.
  2.    appear more bright.
  3.    can't be seen.
  4.    can be vaguely seen.
 Discuss Question
Answer: Option D. -> can be vaguely seen.
:
D
Paper is opaque in nature so we cannot see things on the other side through it. When the oil is spread on it then it becomes translucent. So the object on the other side can be seen vaguely.
Question 38. Among ice, water, kerosene, and petrol which do you think is the heaviest?
  1.    Ice
  2.    Kerosene
  3.    Petrol
  4.    Water
 Discuss Question
Answer: Option D. -> Water
:
D
Ice, kerosene and petrol float on water because they are less denser than water. Thus, water is the heaviest of ice, kerosene and petrol.
Question 39. Which among the following substance is lustrous?
  1.    Stone
  2.    Wood
  3.    Gold
  4.    Plastic
 Discuss Question
Answer: Option C. -> Gold
:
C
Lustre is the property which imparts shine to a substance. Metals generally show this property. Among the given options only gold is a metal. Whereas, stone, wood and plastic are not metals. Hence gold show the property of lustre.
Question 40. Knives that we use in the kitchen are made of steel because of its:
  1.    hardness
  2.    flexibility
  3.    shine
  4.    softness
 Discuss Question
Answer: Option A. -> hardness
:
A
Steel is preferred because of its hardness. Due to this, it can cut almost all the materials used in cooking.

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