SELECT * FROM question_mgmt as q WHERE id=4369 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=12 AND subId=16 AND chapterId=367 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 8th science Materials: Metals and Non-Metals saloni took a piece of burning charcoal and collec

Question:

Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she find the nature of the gas ?
(b) Write down word equations of all the reactions taking place in this process.

Answer:

  1. Saloni find the nature of the gas by using a wet litmus paper. After bringing the litmus paper in contact with the gas; if it turns the blue litmus paper into red then it is acidic. Similarly, if it turns the red litmus into blue then it is basic.
  2. (i) Carbon (C) + Oxygen (O2) → Carbon dioxide (CO2)

(ii) CO2 + Lime water → Milky


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