Chemical Bonding English Medium Free Online Test 1 Mark Questions 2020-2021

9th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

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

    Part A

    10 x 1 = 10
  1. Number of valence electrons in carbon is

    (a)

    2

    (b)

    3

    (c)

    4

    (d)

    5

  2. Atoms having 1,2 or 3 electrons in its valence shell will readily form_____________

    (a)

    cation

    (b)

    anion

    (c)

    Calcium

    (d)

    anion

  3. Bond formed between a metal and non-metal atom is usually____________

    (a)

    ionic bond

    (b)

    covalent bond

    (c)

    co-ordinate bond

    (d)

    covalent bond

  4. Covalent bond is formed by_________

    (a)

    transfer of electrons

    (b)

    sharing of electrons

    (c)

    sharing a pair of electrons

    (d)

    transfer of electrons

  5. Elements with stable electronic configurations have eight electrons in their valence shell. They are__________

    (a)

    Halogens

    (b)

    Metals

    (c)

    Noble gases

    (d)

    non metals

  6. Which of the following atom can exist independently?

    (a)

    Magnesium

    (b)

    Chlorine

    (c)

    Hydrogen

    (d)

    Neon

  7. ___________compounds are highly brittle

    (a)

    Ionic

    (b)

    Covalent

    (c)

    Co-ordinate covalent

    (d)

    Covalent

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

    (a)

    Magnesium oxide

    (b)

    Silicon carbide

    (c)

    Ammonia

    (d)

    All the above

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

    (a)

    NaCI

    (b)

    MgCI2

    (c)

    CCl4

    (d)

    Both a & b

  10. Statement (A) Ionic compounds do not conduct electricity in solid state.
    Reason (B) The ions in ionic compounds are tightly held together by stong electrostatic force of attraction and they can not move freely

    (a)

    B explains A

    (b)

    B do not explain A

    (c)

    B is wrong A

    (d)

    A is right B is wrong

*****************************************

Reviews & Comments about 9th Standard Science Chemical Bonding English Medium Free Online Test 1 Mark Questions 2020-2021

Write your Comment