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NCERT-ATOMS AND MOLECULES -Exercise
- In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic ac...
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- Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water....
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- Which postulate of Dalton’s atomic theory is the result of the law of ...
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- Which postulate of Dalton’s atomic theory can explain the law of defin...
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- Define the atomic mass unit.
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- Why is it not possible to see an atom with naked eyes?
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- Write down the formulae of (i) sodium oxide (ii) aluminium chlor...
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- Write down the names of compounds represented by the following formula...
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- What is meant by the term chemical formula?
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- How many atoms are present in a (i) H(2)S molecule and (ii) PO...
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- Calculate the molecular masses of H(2), O(2), Cl(2), CO(2), CH(4), C(2...
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- Calculate the formula unit masses of ZnO, Na(2)O, K(2)CO(3), given ato...
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- If one mole of carbon atoms weighs 12 grams, what is the mass (in gram...
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- Which has more number of atoms, 100 grams of sodium or 100 grams of ir...
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- A 0.24 g sample of compound of oxygen and boron was found by analysis ...
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- When 3.0 g of carbon is burnt in 8.00 g oxygen, 11.00 g of carbon diox...
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- What are polyatomic ions? Give examples.
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- Write the chemical formulae of the following. (a) Magnesium chlorid...
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- Give the names of the elements present in the following compounds. ...
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- Calculate the molar mass of the following substances. (a) Ethyne, ...
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