$4-$ carbohydrate glucose, lactose , sucrose, starch are present. Different test is carried out with $4-$ carbohydratcs separately. Following observation takes place. 

$(a)$ Heated : it is charred

$(b)$ $I_2$ solution : no violet colour

$(c)$ Fehling solution : reddish brown ppt. is observed

$(d)$ It does not reduce copper$(II)$ acetate to $Cu_2O$ . No red precipiated is observed in $5/ min$ 

The carboxylate which satisfy all the above observation 

  • A
    Glucose
  • B
    Lactose
  • C
    Sucrose
  • D
    Starch
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