Question

Assertion(A) : The formula of sodium carbonate is Na2CO3 .

Reason(R): While writing the formula of a compound ,the valencies of the

cation and anion are crossed

Select the correct answer to these questions from the codes (i), (ii), (iii) and (iv)

as given below :

i) Both A and R are true and R is correct explanation of the assertion.

ii) Both A and R are true but R is not the correct explanation of the assertion.

iii) A is true but R is false.

iv) A is false but R is true.​

Answer 1

Answer:

Using the valencies of cation and anion we can write the formula for a chemical compound and the sodium carbonate can be written as, $Na_2CO_3$, so option (i) is the correct answer.

Explanation:

In order to create a chemical compound's formula, we need to find the cation and anion first.

The sodium ion is the cation in this instance, and it can be written as $Na^+$ that is, and the anion is the carbonate ion can be written as $CO_3^{2-}$.

The sodium ion's valency is +1, and the valency of the anion is -2.

After ion valencies have been crossed, the formula of sodium carbonate can be written as $Na_2CO_3$.

Hence the assertion and reason are the correct statements.

To learn more about valencies, visit:

brainly.in/question/23244665

To learn more about cations and anions, visit:

brainly.in/question/6167119

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