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JEE Main levelOne or more correct optionsDifficulty 2 of 3nm016

For 3-methylpentane, , which of the following statements is/are correct?

  1. AIt contains three primary carbon atoms.
  2. BIt contains two secondary carbon atoms.
  3. CIt contains nine hydrogen atoms attached to primary carbons.
  4. DIt contains six hydrogen atoms attached to secondary carbons.

Answer: A, B, C

The three CH3 groups are primary carbons, carrying 9 H. The two CH2 carbons are secondary, carrying 4 H, not 6. The CH carbon is tertiary and carries 1 H. The statements about 3 primary carbons, 2 secondary carbons and 9 primary H are correct. The statement about 6 secondary H is wrong.
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