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Basic Concepts Set 4

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#1. Simplest formula that gives us information about the simple ratio of atoms in a compound is called

#2. Percentage of oxygen in H2O is

#3. More abundant isotope of an element is one with

#4. Large no. of isotopes are known for the elements whose masses are multiple of

#5. When 0.01 kg of CaCO3 is decomposed the CO2 produced occupies a volume at S.T.P.

#6. The no. of covalent bond in 10gm of NH3 are

#7. No. of molecules present in 10gm of water are

#8. The no. of covalent bonds present in 10gm of water are

#9. The least no. of molecules present in 30 gm of

#10. Which of the following has highest percentage of nitrogen

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