Chemical bonding Model Question Paper

9th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

Time : 01:30:00 Hrs
Total Marks : 50
    8 x 1 = 8
  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. 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

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

    (a)

    NaCI

    (b)

    MgCI2

    (c)

    CCl4

    (d)

    Both a & b

  9. 5 x 1 = 5
  10. ____________theory explains the formation of molecules

    ()

    Kossel - Lewis theory

  11. The valency of noble gases is_____

    ()

    zero

  12. In covalent bond formation, the sharing of________ electrons takes place in their outermost shell.

    ()

    unpaired

  13. __________ & ___________atoms have similar electro negativities

    ()

    Carbon & hydrogen

  14. Jonic compounds are________ in nature.

    ()

    solid

  15. 5 x 1 = 5
  16. Octet rule

  17. (1)

    acceptor bond

  18. Ionic bond

  19. (2)

    Noble gases

  20. Atomic bond

  21. (3)

    covalent bond

  22. Atom which accepts electron pair

  23. (4)

    donar atom

  24. Atom which provides electron pair

  25. (5)

    Electrovalent bond

    3 x 1 = 3
  26. In the formation of compounds, the inner shell electrons of an atom involve in bonding.

  27. Ionic compounds have low melting and boiling point

  28. Greater the charge of the cation greater will be the ionic character

  29. 2 x 2 = 4
  30. Water, acetone, benzene, toluene turpentine

  31. Platinum, palladium NaBH4, cro3,

  32. 5 x 3 = 15
  33. Explain Octet rule with an example.

  34. Write a note on different types on bonds?

  35. Why are Noble gases inert in nature?

  36. What is chemical bond?

  37. What are reducing agents? Give examples.

  38. 2 x 5 = 10
  39. List down the differences between Ionic and Covalent compounds.

  40. Discuss in brief about the properties of Coordinate covalent compounds.

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

Reviews & Comments about 9th Standard Science - Chemical bonding Model Question Paper

Write your Comment