What makes the basis of sorting materials into groups?
  • Similarities in their properties
  • Differences in their properties
  • Both similarities and differences in their properties
  • All of these
Which one will show a metallic lustre?
  • Any surface of a metal
  • Freshly cut surface of a metal
  • Freshly cut surface of non-metal
  • Surfaces of all materials
An oily thin paper sheet will be
  • transparent
  • translucent
  • opaque
  • cannot be predicted
Purpose of sorting material into groups is
  • to rtudy their properties
  • convenience
  • both (a) and (b)
  • inconvenience
Which is a set of transparent materials?
  • Glass and air
  • Water and glass
  • Water and air
  • All of these
Choose the opaque object from the following:
  • Charcoal
  • Air
  • Glass
  • Water
Which one of the following is not soluble in water?
  • Turmeric powder
  • Common salt
  • Alum
  • All are soluble
Which object shines?
  • Plastic toy
  • Cotton shirt
  • Steel spoon
  • Stone piece
Which of the following has reddish brown colour?
  • Gold
  • Copper
  • Iron
  • Brass
Which one of the following is insoluble in water?
  • Alcohol
  • Sodium chloride
  • Coconut oil
  • Sugar
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