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Chemistry

Chemistry
Sour milk contains

Acetic acid
Citric acid
Lactic acid
Tartaric acid

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Chemistry
In arc welding, Argon is used because of its

High calorific value
High flammability
Ability to lower the melting point of the metal
Low reactivity with metal

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Chemistry
Iron and manganese present as pollutants in water cannot be removed by________

Oxidation followed by settling and filtration
Ion exchange process
Chlorination
Lime soda process or manganese zeolite process

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Chemistry
‘Aerosol’ is known as

Pollutant gas, present in air
Microbes, present in air
Suspended solid particles in air
Green house gas present in air

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Chemistry
The fat of a common mussel-secretes a sticky glue that can be used to make heart implants. The unique chemical compound present in the glue is:

Amino phenyl alanine
Phenyl alanine
Hydroxy phenyl alanine
Dihydroxy phenyl alanine

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Chemistry
The three elements most needed in common fertilisers are :

Calcium, Phosphorous and Potassium
Nitrogen, Potassium and Phosphorous
Phosphorous, Sodium and Nitrogen
Sulphur, Phosphorous and Sodium

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