Carbon and its Compounds Important Question Answers

9th Standard

    Reg.No. :
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Science

Time : 01:30:00 Hrs
Total Marks : 50
    5 x 3 = 15
  1. Differentiate graphite and diamond

  2. What are saturated and unsaturated compounds called?

  3. Carbon do not form ionic compounds. Why?

  4. What is the valency of carbon in carbon monoxide?

  5. Why are one-time use and throwaway plastics harmful?

  6. 7 x 5 = 35
  7. What is catenation? How does carbon form catenated compounds?

  8. What are the chemical reactions of carbon? 

  9. Name the three safer resin codes of plastics and describe their features.

  10. Why do carbon exist mostly in combined state?

  11. When a carbon fuel burns in less aerated room, it is dangerous to stay there. Why?

  12. Explain how dioxins are formed, which plastic type they are linked to and why they are harmful to humans.

  13. Yugaa wants to buy a plastic water bottle. She goes to the shop and sees four different kinds of plastic bottles with resin codes 1, 3, 5 and 7. Which one should she buy? Why?

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