Matter Around Us Important Questions

7th Standard EM

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

Time : 01:00:00 Hrs
Total Marks : 50
    4 x 1 = 4
  1. The graphite refill used is pencil is made of element called ___________

    (a)

    graphit

    (b)

    carbon

    (c)

    silicon

    (d)

    sodium

  2. The most abundant type of atom is the universe is _____________

    (a)

    Helium

    (b)

    Hydrogen

    (c)

    Argon

    (d)

    Argon

  3. Amolecule which contains only one atom is called _________ molecule

    (a)

    monoatomic

    (b)

    diatomic

    (c)

    triatomic

    (d)

    none

  4. Matter is its simplest form is called ______________

    (a)

    molecule

    (b)

    Metals

    (c)

    element

    (d)

    none

  5. 5 x 1 = 5
  6. The name copper was taken from ___________

    ()

    cypress

  7. There are __________ hydrogen atoms in water molecule

    ()

    2

  8. ______________ is the total number atoms present in one molecule of an element, compound or a substance.

    ()

    Atomicity

  9. ____________ is the smallest particle of an element.

    ()

    Atom

  10. ___________ exhibit properties of mater and have individual existence

    ()

    Molecules

  11. 5 x 1 = 5
  12. Metals are usually solids or gases at room temperature.

    (a) True
    (b) False
  13. Non-metals are usually, good conductors of heat and electricity.

    (a) True
    (b) False
  14. The metal which is liquid at room temperature is Copper.

    (a) True
    (b) False
  15. The symbol of phosphorus is P.

    (a) True
    (b) False
  16. The melting of ice is an example· of change in the states of matter.

    (a) True
    (b) False
  17. 5 x 1 = 5
  18. CO2

  19. (1)

    Robert Boyle

  20. Element

  21. (2)

    fire extinguisher

  22. Non-metals

  23. (3)

    Silicon

  24. Metalloids

  25. (4)

    dull and soft

  26. Water

  27. (5)

    triatomic molecule

    3 x 2 = 6
  28. Two different elements may have similar atoms

    (a) True
    (b) False
  29. Atoms cannot exist alone; they can only exist as groups called molecules.

    (a) True
    (b) False
  30. Argon is mono atomic gas.

    (a) True
    (b) False
  31. 7 x 2 = 14
  32. Write the chemical formula and name the elements present in the following compounds:
    a. Sodium chloride
    b. Potassium hydroxide
    c. Carbon-di-oxide
    d. Calcium oxide
    e. Sulphur dioxide

  33. Define the following terms with an example of each:
    a. Element
    b. Compound
    c. Metal
    d. Non-metal
    e. Metalloid

  34. Classify the following as metals, non-metals and metalloids
    Sodium, Bismuth, Silver, Nitrogen, Silicon, carbon, chlorine, Iron, copper.

  35. How many elements are known at present?

  36. What is a molecule?

  37. What is a chemical formula?

  38. Name the elements is air?

  39. 2 x 3 = 6
  40. Give an example for the elements derived from their Latin names

  41. Lists the metals, non-metals and metalloids which you used in your house, schools. Compare their properties

  42. 1 x 5 = 5
  43. Write any five characteristics of compound.

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

Reviews & Comments about 7th Standard Science Chapter 3 Matter Around Us Important Question Paper

Write your Comment