Matter Around Us Important Questions

7th Standard

    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 ___________

    A PHP Error was encountered

    Severity: Warning

    Message: A non-numeric value encountered

    Filename: material/details.php

    Line Number: 1002

    ()

    cypress

  7. There are __________ hydrogen atoms in water molecule

    A PHP Error was encountered

    Severity: Warning

    Message: A non-numeric value encountered

    Filename: material/details.php

    Line Number: 1002

    ()

    2

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

    A PHP Error was encountered

    Severity: Warning

    Message: A non-numeric value encountered

    Filename: material/details.php

    Line Number: 1002

    ()

    Atomicity

  9. ____________ is the smallest particle of an element.

    A PHP Error was encountered

    Severity: Warning

    Message: A non-numeric value encountered

    Filename: material/details.php

    Line Number: 1002

    ()

    Atom

  10. ___________ exhibit properties of mater and have individual existence

    A PHP Error was encountered

    Severity: Warning

    Message: A non-numeric value encountered

    Filename: material/details.php

    Line Number: 1002

    ()

    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)

    triatomic molecule

  22. Non-metals

  23. (3)

    fire extinguisher

  24. Metalloids

  25. (4)

    Silicon

  26. Water

  27. (5)

    dull and soft

    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 dioxide
    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. List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.

      Place metals  Non-metals  metalloids
    1. ln my house Iron, Aluminium,
    Silver, Copper. Gold
    Argon,Iodine. Silicon, Arsenic
    2. In my school Mercury, Lead Carbon(Graphite) Boron, Germanium
  42. 1 x 5 = 5
  43. Write any five characteristics of compounds.

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

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

Write your Comment