Chapter 03 Atoms and Molecules Questions-01
Questions
1. In a reaction,
sodium carbonate + acetic acid
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Answer
Law of conservation of mass states that mass is neither created nor destroyed during a chemical reaction.
It means the mass remains the same. So, we add the mass of the reactants on LHS and add the mass of all products on RHS
LHS
RHS
LHS
So, the observations are in agreement with the law of conservation of mass.
2. Hydrogen and oxygen combine in the ratio of
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Answer
‘Law of constant proportions’ states that composition of a compound is always fixed.
Applying this
3. Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?
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Answer
Following postulate of Dalton’s atomic theory is the result of the law of conservation of mass. ‘Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.’
4. Which postulate of Dalton’s atomic theory can explain the law of definite proportions?
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Answer
Following postulate of Dalton’s atomic theory can explain the ’law of definite proportions'.
‘The relative number and kinds of atoms are constant in a given compound.’
