Matter Around Us - One Mark Questions

7th Standard EM

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Science

Time : 00:30:00 Hrs
Total Marks : 25
    5 x 1 = 5
  1. Which of the following is an example of a metal?

    (a)

    Iron

    (b)

    Oxygen

    (c)

    Helium

    (d)

    Water

  2. An element which is always lustrous, malleable and ductile

    (a)

    non-meta

    (b)

    metal

    (c)

    metalloid

    (d)

    gas

  3. The graphite refill used is pencil is made of element called ___________

    (a)

    graphit

    (b)

    carbon

    (c)

    silicon

    (d)

    sodium

  4. The smallest unit of an element is _____________

    (a)

    atom

    (b)

    molecule

    (c)

    compound

    (d)

    none

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

    (a)

    Helium

    (b)

    Hydrogen

    (c)

    Argon

    (d)

    Argon

  6. 10 x 1 = 10
  7. The smallest particle of matter that can exist by itself______

    ()

    atom

  8. A compound containing one atom of carbon and two atoms of oxygen is_________

    ()

    CO2

  9. ________is the only non-metal conducts electricity.

    ()

    Graphite

  10. Elements are made up________ of kinds of atoms.

    ()

    same

  11. ________of some elements are derived from Latin or Greek names of the elements.

    ()

    Symbol

  12. The name copper was taken from ___________

    ()

    cypress

  13. The first letter of a symbol of an element is always written as a _______________ letter and the second letter as a ______________ letter

    ()

    capital, small

  14. There are __________ hydrogen atoms in water molecule

    ()

    2

  15. There is ___________ oxygen atom is water molecule

    ()

    1

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

    ()

    Atomicity

  17. 5 x 1 = 5
  18. Metals are usually solids or gases at room temperature.

    (a) True
    (b) False
  19. Non-metals are non-malleable.

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

    (a) True
    (b) False
  21. Sodium chloride is used as table salt and for flavoring and preserving food.

    (a) True
    (b) False
  22. Lead is also known as plumbum.

    (a) True
    (b) False
  23. 5 x 1 = 5
  24. CO2

  25. (1)

    Making mobile phones

  26. Sulphur

  27. (2)

    Robert Boyle

  28. Element

  29. (3)

    triatomic molecule

  30. Gallium

  31. (4)

    dull and soft

  32. Non-metals

  33. (5)

    Polyatomic molecule

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