1. Molecular formula of hydrocarbons

Select the correct molecular formula for the given compounds:
  
 
Answer variants:
\(CH_2=CH-(CH_2)_4-CH_3\)
\(CH_3-(CH_2)_5C\) \(\equiv CH\)
\(CH_3-(CH_2)_3-COOH\)
\(CH_3-(COH)_3-CH_3\)
  
1. Oct-1-yne -
 
2. Hept-1-ene -
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