10th Class Science Metals and Non-metals Question Bank 10th CBSE Science Metals and Non-metals

  • question_answer   A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is toxic whereas C causes global warming. (a) Identify A, B and C (b) To which group of periodic table does A belong?           

    Answer:

                      (a) A = Carbon (C); B = Carbon monoxide (CO); C = Carbon dioxide .                              (1) (b) Carbon (or A) has atomic number = 6 Its electronic configuration is 2, 4. It is present in 14th group (10 + valence electron) of the periodic table.                                                   (1)


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