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Carbon and its Compounds 

9th Standard Science - Carbon and its Compounds Book Back Questions

Carbon and its Compounds Book Back Questions

9th Standard

    Reg.No. :
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Science

Time : 00:45:00 Hrs
Total Marks : 35
    6 x 1 = 6

  1. A phenomenon in which an element exists in different modification in same physical state is called

    (a)

    Isomerism

    (b)

    Allotropy

    (c)

    Catenation

    (d)

    Crystallinity

  2. The carbon atoms in fullerene are arranged in mixed

    (a)

    Tetragon and Pentagon

    (b)

    Pentagon and Hexagon

    (c)

    Hexagon and Heptagon

    (d)

    Heptagon and Octagon

  3. Raagav brings his lunch every day to school in a plastic container which has resin code number 5. The container is made of

    (a)

    Polystyrene

    (b)

    PVC

    (c)

    Polypropylene

    (d)

    LDPE

  4. Which of the following plastic items are banned by the Government of Tamil Nadu as of 1st January 2019?

    (a)

    Plastic sheets

    (b)

    Plastic tea cups

    (c)

    Plastic water packets

    (d)

    All the above

  5. Graphite is used as lubricant in machines because

    (a)

    it is good conductor of electricity

    (b)

    it is made of slippery layers and has high melting point

    (c)

    it has high density

    (d)

    it is strong and soft

  6. Plastic resin codes are shown as three chasing arrows in a ______________ with a number in the middle or letters (an acronym of that plastic type).

    (a)

    Logo

    (b)

    Recycling symbol

    (c)

    Square

    (d)

    Triangle

    7. 3 x 1 = 3

  7. __________ named carbon.

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    Lavoisier

  8. Compounds with same molecular formula and different structural formula are known as ____________.

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    Isomerism

  9. There are ____________ plastic resin codes

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    7

    10. 5 x 1 = 5

  10. Alkyne

    11. (1)

    Polystyrene

  11. Andre Geim

    12. (2)

    Bucky Ball

  12. C60

    13. (3)

    Triple bond

  13. Thermocol

    14. (4)

    Oxidation

  14. Combution

    15. (5)

    Graphene
    3 x 2 = 6

  15. It is the hardest allotrope of carbon Mondadi

  16. Plastics made of ___________ are represented by resin code # 6. sytlopynere

  17. Expanded polystyrene is commercially known as mthreolco

    18. 1 x 2 = 2

  18. Who is called 'Father of Modern Organic Chemistry'?

    19. 1 x 3 = 3

  19. Carbon do not form ionic compounds. Why?

    20. 2 x 5 = 10

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

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

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