$N a_{2} C O_{3} + x H C l \to 2 N a C l + C O_{2} + H_{2} O$
The value of $' x'$ is:

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answer is B.

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Detailed Solution

What occurs in a chemical reaction is described in writing by a chemical equation. Reactants, the initial components, are given on the left side of the equation. The reaction's direction is then indicated by an arrow. The products, or compounds created, are listed on the reaction's right side.

You can determine the quantities of reactants and products required to satisfy the Law of Conservation of Mass using a balanced chemical equation. In essence, this indicates that the numbers of each sort of atom on the left and right sides of the equation are equal.

For balancing a chemical equation, the number of elements on both sides must be the same. In the given reaction two NaCl molecules are formed by reacting with x moles of HCl. Also, two atoms of hydrogen are present in water. Thus 'x' can have a value of two.

Hence, option B is correct.

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