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10th Class Science Metals and Non-metals / धातु और अधातु Question Bank 10th CBSE Science Metals and Non-metals

  • question_answer
      An element A bums with golden flame in air. It reacts with another element B, atomic number 17 to give a product C. An aqueous solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A, B, C and D. Also write down the equations for the reactions involved. [NCERT Exemplar]

    Answer:

                      A- Na; B ? Cl2; C - NaCI; D - NaOH 2Na + Cl2  2NaCl 2NaCl(aq) +  2H2O(l)  2NaOH(aq) + Cl2(g) + H2(g)


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