SELECT * FROM question_mgmt as q WHERE id=5998 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=11 AND subId=16 AND chapterId=466 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 7th science Physical and Chemical Changes when baking soda is mixed with lemon juice bubble

Question:

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.

Answer:

When baking soda (Sodium bicarbonate) is mixed with lemon juice (citric acid), bubbles formed because of evolution of carbon dioxide gas. When baking soda is mixed with citric acid (lemon juice), formation of bubble is occur. These bubbles are formed due to the presence of carbon dioxide presence and this shows the chemical change.

Lemon Juice + Baking soda (Sodium bicarbonate) → Carbon dioxide + other substances


SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='11' AND subId='16' AND ex_no!=0 AND status=1 and id!=5998 ORDER BY views desc, last_viewed_on desc limit 0,10
SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='11' AND subId='16' AND ex_no!=0 AND status=1 and id!=5998 ORDER BY last_viewed_on desc limit 0,10

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  • Answered by Ekta Mehta
  • 4 months ago

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