The compound called blue vitriol is

A mixture of two gases are called 'Syn gas'. Identify the mixture.

Which one of the following functional ingredients improves gastrointestinal health
and also calcium absorption ?

Which one is the poorest method of food freezing ?

The difference in UHT pasteurized milk and extended shelf life treated pasteurized
milk is of

The post harvest transportation and storage of banana for distant marketing with
minimum chilling injury is carried out at what temperatures ?