Write the name and formula of the $2^{nd}$ member of the homologous series having the general formula $C_{n}H_{2n-2}$.

  • A
    Propyne,$C_{3}H_{4}$
  • B
    Butyne,$C_{4}H_{6}$
  • C
    Ethyne,$C_{2}H_{2}$
  • D
    Pentyne,$C_{5}H_{8}$

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$(a)$ $CH_3-CH_2-CH_2-CH_2-CH_2-CH_2-CHO$
$(b)$ $CH_3-CH_2-CH_2-CH_2-CH_2-OH$

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