Is mild white turbidity a positive result for iodoform test in a sample suspected to contain ethanol??

Also shouldnt glucose n other sugars also show positive for test for alcoholic group....what bt iodoform test with glucose ?

1. It depends on what you mean by mild white turbidity. If a precipitate is present, it means a positive result.

 

2. No. The halo form reaction only works if you have a methyl ketone, methyl secondary alcohol, ethanol or ethanal present. None of these are present in glucose.

But i got a white ppt with both glucose and sucrose

I would need more information about your experiment to know how to help you.

I was performing the test for alcohol group using iodoform test...i got an off white ppt with ethanol..(first adding iodine sol and then decolorize with naoh and heat)

Then i thought glucose also has oh- group that is secondary so it should also give iodoform test and it did give similar ppt...so with sucrose

It should only give a positive result if it is a secondary methyl alcohol. Glucose and sucrose do not have this functionality.