10th Class Science Acids, Bases and Salts / अम्ल, क्षार एवं लवण Question Bank 10th CBSE Science Acids, Bases and Salts

  • question_answer
      Name the gas evolved when dilute HCl reacts with sodium hydrogen carbonate. How is it recognized?                          [CBSE Delhi 2008]

    Answer:

                      When zinc reacts with dilute solution of strong acid, it forms salt and hydrogen gas is evolved. Zn + 2HCl  ZnCl2 + H2 When a burning splinter is brought near the mouth of the test tube, the gas burns with a pop sound.


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