Which one of the following is not a physical hurdle used in preservation of foods

Which one of the following acids is used to detect vanaspati adulteration in pure
ghee ?

Among the biological hazards, which of the bacteria in food causes infection and not
intoxication ?

Which of the following are not conjugated proteins ?

An article of food shall be deemed to be non-adulterated if

A food product process condition coined by contamination, mixing and processing
under uncontrolled conditions, and rendering it unfit for consumption is referred as