science
Grade-5
Easy
Question
Which of the following is/are not a property of plastics?
I. Plastics are non-combustible.
II. Plastics do not react with air and acids.
III. Plastics are insoluble in water.
IV. Plastics are a poor conductor of heat
I. Plastics are non-combustible.
II. Plastics do not react with air and acids.
III. Plastics are insoluble in water.
IV. Plastics are a poor conductor of heat
- II and I only
- II and III only
- Only II
- Only I
Hint:
Plastics are durable and unreactive but they are combustible.
The correct answer is: Only I
- Plastic is made of petroleum, and therefore has the disadvantage of being flammable.
- Plastics are insulators and are chemically inert.
- They are also insoluble in water(PVC)
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