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Writing and Reading a Chemical Equations

The balancing...

Question

The balancing of chemical equation is based upon:

A

Law of multiple proportions

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B

Law of conservation of mass

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C

Law of combining volume

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D

Law of definite proportions

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Solution

The correct option is B Law of conservation of mass
The balancing of chemical equation is based upon law of conservation of mass owing to the fact that matter can neither be created nor destroyed.

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Similar questions

Q. Balancing of a chemical equation is based on which of the following law?

Q. State the law on which a balanced chemical equation is based

Q. Assertion :The balancing of chemical equations is based on law of conservation of mass. Reason: Total mass of reactants is equal to total mass of products.

We know that balancing of a chemical equation is entirely based on law of conservation of mass. However, the concept of Principle of Atom Conservation (POAC) can also be related to law of conservation of mass in a chemical reaction. So, POAC can also act as a technique for balancing a chemical equation. For example, for a reaction:

A B C_{3} \to A B + C_{2}

On applying POAC for A,B & C and relating the 3 equations, we get :

\frac{n_{A B C_{3}}}{2} = \frac{n_{A B}}{2} = \frac{n_{C_{2}}}{3}

n_{x}

: number of moles of X)
Thus, the coefficients of

A B C_{3}

A B

C_{2}

in the balanced chemical equation will be 2, 2 & 3 respectively and the balanced chemical equation can be represented as:

2 A B C_{3} \to 2 A B + 3 C_{2}

Now answer the following question.

Which of the following relation is correct regarding the numerical coefficients p, q, r in the balanced chemical equation,

p A + q B_{2} \to r A_{2} B_{5}

?

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