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JEE Main levelOne or more correct optionsDifficulty 2 of 3mc174

Using C = 12 and H = 1, select the correct statement(s) about the mass percentage of carbon.

  1. A and have the same percentage of carbon.
  2. BThe percentage of carbon in is greater than in .
  3. C and have the same percentage of carbon.
  4. D and have the same percentage of carbon.

Answer: A, B, D

Equal C:H ratio means equal percentage. C2H4 and C4H8 are both CH2 (85.71%), and C2H2 and C6H6 are both CH (92.31%). C2H6 has 80.00% against 85.71% for C2H4, so that statement is wrong. C3H6 has 85.71% and C3H8 has 81.82%, so it is true.
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