Chemistry
Which of the following is used as a preservative to protect processed food?

Saccharin
Sodium metabisulphite
BHT
Sodium sulphate

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Chemistry
Which of the process is known as nitrification?

Reaction of nitrogen dioxide with water to form nitric acid
Conversion of nitrite to nitric oxide
Conversion of ammonia to nitrites
Reaction of Nitrogen Monoxide with oxygen to form nitric acid

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