Mathose, lactose and sucrose are

How many of them are non reducing sugars among the following: Glucose, Fructose, Maltose, Lactose, sucrose, mannose, starch, cellulose_____

Disaccharides:-a) maltose b) lactose c) sucrose || Polysaccharides:-a)starch b)cellulose c) glycogen

Which disaccharides among sucrose, maltose and lactose is / are expected to give positive fehling's test?

Lactose is a

Lactose is a

Maltose |Lactose|Sucrose|Invert Sugar|Summary

Maltose |Lactose|Sucrose|Invert Sugar|Summary

Sucrose is a non-reducing sugar. maltose and lactose are reducing sugars. why?

Sucrose is a non-reducing sugar. Maltose and lactose are reducing sugars. Why ?