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JEE Main levelSingle correct optionDifficulty 2 of 3bn188

Assertion (A): In $NaHCO X_{3}$ the oxidation number of carbon is $+ 4$ . Reason (R): $NaHCO X_{3}$ is named sodium hydrogencarbonate. Choose the correct option.

ABoth A and R are true and R is the correct explanation of A
BBoth A and R are true but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true

Answer: B

Na = +1, H = +1, O =

- 2

:

1 + 1 + x - 6 = 0

gives C = +4 (A true). The name sodium hydrogencarbonate is also true (R), but it is only a naming rule and does not explain the oxidation number.

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