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Atoms and Molec...

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  • Question 1
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    Which of the following is a merit of Dalton's atomic theory?

  • Question 2
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    Which of the following explains Democritus' atomic model?

  • Question 3
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    Ionic species with a positive charge called as : 

  • Question 4
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    Find the best option among the following about the simplest unit of water that retains its properties :

  • Question 5
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    What is the approximate mass of $$Ca(NO_3)_2$$?

    (Given- Atomic mass of $$Ca = 40, N = 14, O = 16$$)

  • Question 6
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    Total how many atoms are present in the formula $$Ca_3(PO_4)_2$$?

  • Question 7
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    Total number of atoms present in the formula $$Na_2CO_3$$ is : 

  • Question 8
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    All of the following are compounds except :

  • Question 9
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    The molar mass of $$\displaystyle Al{ Cl }_{ 3 }$$ is:

  • Question 10
    1 / -0

    One atomic mass unit is equal to?

    (Given, mass of one carbon-12 atom $$= 1.992 \times 10^{-23}$$)

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