Answer:
The product of the reaction is Butanoic acid
Step-by-step explanation:
This reaction of 1-butanol with K2Cr2O7, H2SO4, heat is an oxidation reaction. 1- Butanol is a primary alcohol which will oxidize partially to Butanal and then into Butanoic acid. 
CH3CH2CH2CH2OH ⇒ CH3CH2CH2COOH. 
 Butanol Butanoic acid 
- The oxidation to Butanal involves removal of two hydrogen atoms 
- The oxidation to Butanoic acid involves addition of an oxygen atom 
- The product Butanal can be produced if it is quickly distilled off. 
(please find the attached document containing the diagram of the orgainic product)