Which of the following are reducing sugars?

[NZ]

Beta-D-glucose

methyl-alpha-D-glucoside

alpha-D-fructose

sucrose

maltose

 

and also what is the number of the carbon atom that is an aldehyde or ketone group in open chain form?

[Greippi]

Is this homework? We're not meant to feed you answers.

 

What's the definition of a reducing sugar? That should help you get some of the way there.

 

Look up the structures of the sugars. It should then be very easy to find the number of the carbon atom that way.

[jimmydasaint]

To the O.P. - I think this site may help you. Why not read it first and then give us all your feedback and understanding of sugars?

http://www.umanitoba.ca/Biology/lab2/biolab2_2.html