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The formula of a compound is X(3)Y. The...

The formula of a compound is `X_(3)Y`. The valencies of element `X` and `Y` will be respectively :

A

`1` and `3`

B

`3` and `1`

C

`2` and `3`

D

`3` and `2`

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The correct Answer is:
A
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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
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  2. Molecular compounds are usually formed by the combination between :

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  3. The formula of a compound is X(3)Y. The valencies of element X and Y ...

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  5. An element A forms an oxide A(2)O(5). (a) What is the valency of ...

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  6. An element X forms the following compounds with hydrogen, ca...

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  7. If the aluminium salt of an anion X is Al(2)X(3), what is the valency...

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  8. The formula of carbonate of a metal M is M(2)CO(3). (a) What will ...

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  9. The atom of an element X contains 17 protons, 17 electrons and 18 neu...

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  10. What is a group of 6.022 xx 10^(23) particles known as ?

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  11. What name is given to the amount of substance containing 6.022 xx 10...

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  12. What is the numerical value of Avogardo number ?

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  13. How many atoms are present in one gram atomic mass of a substance ?

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  14. How many molecules are present in one gram molecular mass of a substan...

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  15. What name is given to the number 6.022 xx 10^(23) ?

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  16. Convert 12 g of oxygen gas into moles.

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  17. How many moles are 3.6 g of water ?

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  18. What name is the mass of 0.2 mole of oxygen atoms ?

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  19. Find the mass of 2 moles of oxygen atoms ?

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  20. Fill in the following blanks : (a) 1 mole contains "…………." atoms, ...

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