Chapter 4: Sorting Materials Into Groups
Q1. Which object shines?
(a) Plastic toy
(b) Cotton shirt
(c) Steel spoon
(d) Stone piece
Answer
Answer: (c) Steel spoon
Q2. Which of the following has reddish brown colour?
(a) Gold
(b) Copper
(c) Iron
(d) Brass
Answer
Answer: (c) Iron
Q3. Which one of the following is not soluble in water?
(a) Turmeric powder
(b) Common salt
(c) Alum
(d) All are soluble
Answer
Answer: (a) Turmeric powder
Q4. Which one of the following is insoluble in water?
(a) Alcohol
(b) Sodium chloride
(c) Coconut oil
(d) Sugar
Answer
Answer: (c) Coconut oil
Q5. What makes the basis of sorting materials into groups?
(a) Similarities in their properties
(b) Differences in their properties
(c) Both similarities and differences in their properties
(d) All of these
Answer
Answer: (c) Both similarities and differences in their properties
Q6. Which one will show a metallic lustre ?
(a) Any surface of a metal
(b) Freshly cut surface of a metal
(c) Freshly cut surface of non-metal
(d) Surfaces of all materials
Answer
Answer: (b) Freshly cut surface of a metal
Q7. An oily thin paper sheet will be
(a) transparent
(b) translucent
(c) opaque
(d) cannot be predicted
Answer
Answer: (b) translucent
Q8. Purpose of sorting material into groups is
(a) to study their properties
(b) convenience
(c) both (a) and (b)
(d) inconvenience
Answer
Answer: (c) both (a) and (b)
Q9. Which is a set of transparent materials?
(a) Glass and air
(b) Water and glass
(c) Water and air
(d) All of these
Answer
Answer: (d) All of these
Q10. Choose the opaque object from the following:
(a) Charcoal
(b) Air
(c) Glass
(d) Water
Answer
Answer: (a) Charcoal