CBSE Class 10 Science 2019 · Paper 31/1/1 · Question 22(b)
What is observed when 2 mL of dilute hydrochloric acid is added to 1 g of sodium carbonate taken in a clean and dry test tube? Write chemical equation for the reaction involved.
Answer
Brisk effervescence of carbon dioxide gas; .
Observation: brisk effervescence; bubbles of a colourless, odourless gas, carbon dioxide, are given off and the sodium carbonate dissolves (the gas turns lime water milky).
Equation:
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