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Which one of the following statements is not true ?  
Option: 1 Lactose contains \alpha -\text{glycosidic} linkage between C_{1} of galactose and \text{C}_{1} of galactose and \text{C}_{4} of glucose.    
Option: 2 Lactose is a reducing sugar and it gives Fehling's test.
Option: 3 Lactose (\text{C}_{11}\text{H}_{22}\text{O}_{11}) is a disaccharide and it contains 8 hydroxyl groups.
Option: 4 On acid hydrolysis, lactose gives one molecule of D(+)-\text {glucose} and one moecule of D(+)-\text {galctose}.

Answers (1)

best_answer

 

Lactose contains \beta -\text{glycosidic} linkage not \alpha -\text{glycosidic} between C_{1} of galactose and \text{C}_{1} of galactose and \text{C}_{4} of glucose.

So, Statement 1 is incorrect but the rest statements are correct.

Therefore, the correct option is (1).

Posted by

Kuldeep Maurya

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