Chemical Bonding 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. Sodium having atomic number 11, ready to_______________electron/electrons to attain the nearest noble gas electronic configuration.

    (a)

    gain one

    (b)

    gain two

    (c)

    lose one

    (d)

    lose two

  2. The element that would form anion by gaining electrons in a chemical reaction is___________

    (a)

    Potassium

    (b)

    Calcium

    (c)

    Fluorine

    (d)

    Iron

  3. ____________compounds have high melting and boiling points.

    (a)

    Covalent

    (b)

    Coordinate

    (c)

    Ionic

    (d)

    Coordinate

  4. Oxidising agents are also called as____________because they remove electrons form other substances.

    (a)

    electron donors

    (b)

    electron acceptors

    (c)

    electron donors

    (d)

    Ionic

  5. Alkali and alkaline earth metals form____________ compound when they react with nonmetals

    (a)

    ionic

    (b)

    covalent

    (c)

    co-ordinate covalent

    (d)

    all the above

  6. The bond which is formed by mutual sharing of electrons is called ________bond.

    (a)

    ionic

    (b)

    covalent

    (c)

    co-ordinate covalent bond

    (d)

    all the above

  7. _______________is an example of a covalent compound having high melting point

    (a)

    Magnesium oxide

    (b)

    Silicon carbide

    (c)

    Ammonia

    (d)

    All the above

  8. Which of the following compound(s) possesses high melting point?

    (a)

    NaCI

    (b)

    MgCI2

    (c)

    CCl4

    (d)

    Both a & b

  9. Statement (A) : Covalent compounds are bad conductor of electricity.
    Reason (B) Covalent compounds contain charged particles (ions)

    (a)

    B explains A

    (b)

    B does not explain A

    (c)

    Both A & B are right

    (d)

    Both A & B are wrong

  10. The property which is characteristics of an Ionic compound is that

    (a)

    it oen exists as gas at room temperature

    (b)

    it is hard and brittle

    (c)

    it undergoes molecular reactions

    (d)

    it has low melting point

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