Question : Which of the following chemicals is used as a preservative to slow browning and discolouration in foods and beverages during preparation, storage, and distribution?
Option 1: Nitrous oxide
Option 2: Phosgene
Option 3: Sulphites
Option 4: Chlorine
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Correct Answer: Sulphites
Solution : The correct answer is Sulphites.
Sulphites is a sulphur-containing compound that has been used for centuries to prevent discolouration and slow browning during the storage and distribution of many foods. When some fruits are cut, the exposure of the flesh to oxygen results in enzymatic browning. Several different products are used to prevent this naturally occurring process, and one of them is sulphites. They are used as an additive to maintain food colour and shelf life.
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Question : Which of the following gases is known as "laughing gas"?
Option 2: Nitrogen peroxide
Option 3: Nitrogen
Option 4: Nitric oxide
Question : The pair of compounds used as anaesthetic in medicines :
Option 1: Ether, Ammonia
Option 2: Nitrous oxide, Chloroform
Option 3: Chloroform, Nitrogen dioxide
Option 4: Nitrogen dioxide, Ether
Question : Which of the following organisms is most likely to produce greenhouse gases such as nitrous oxide and methane?
Option 1: Fungi
Option 2: Earthworm
Option 3: Bacteria
Option 4: Greenplants
Question : The chemical name of 'laughing gas' is
Option 1: Nitric Oxide
Option 2: Nitrogen Dioxide
Option 3: Nitrogen Pentaoxide
Option 4: Nitrous Oxide
Question : The amount of chlorine available in water after disinfection is called as
Option 1: Free chlorine
Option 2: Residual chlorine
Option 3: Free available chlorine
Option 4: Combined available chlorine
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