Carbon and its Compounds English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

9th Standard

    Reg.No. :
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Science

Time : 00:10:00 Hrs
Total Marks : 10

    Part A

    10 x 1 = 10
  1. Number of free electron(s) in each carbon of graphite is

    (a)

    one

    (b)

    Two

    (c)

    Three

    (d)

    Four

  2. Carbon forms large number of organic compounds due to

    (a)

    Allotropy

    (b)

    Isomerism

    (c)

    Tetravalency

    (d)

    Catenation

  3. Which of the following does not contain double bond

    (a)

    CO2

    (b)

    C2H4

    (c)

    HCl

    (d)

    O2

  4. 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

  5. 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

  6. The lead pencil contains

    (a)

    Graphite

    (b)

    Diamond

    (c)

    Lead

    (d)

    Charcoal

  7. 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

  8. Hydrocarbons on burning in the air give CO2 and _____________.

    (a)

    Water and heat

    (b)

    CO and Heat

    (c)

    Water and CO

    (d)

    Water and Sulphur dioxide

  9. In a covalent bond formation

    (a)

    transfer of electrons takes place

    (b)

    equal sharing of electrons between two atoms takes place.

    (c)

    electrons are shared by one atom only.

    (d)

    electrons are donated by one atom and shared by both atoms.

  10. The thinnest and strongest allotrop of carbon is ______________.

    (a)

    Graphite

    (b)

    Fullerene

    (c)

    Graphene

    (d)

    Diamond

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