question_answer

Assertion (A): Sodium reacts with water, producing a hissing sound. Reason (R): Sodium reacts with water and produces hydrogen gas. (a) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion. (b) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (c) Assertion is correct and Reason is incorrect. (d) Assertion is incorrect and Reason is correct

Answer:

\[\underset{Sodium}{\mathop{2Na}}\,+2{{H}_{2}}O\xrightarrow{{}}\underset{Sodium\text{ }hydroxide}{\mathop{2NaOH}}\,+{{H}_{2}}\] The hissing sound is due to the production of hydrogen gas.