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Chemistry

Chemistry
The metal present in vitamin B12 is

Co
Mg
Fe
Mo

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Chemistry
The enzyme that converts glucose to ethyl alcohol is :

Invertase
Maltase
Diastase
Zymase

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Chemistry
Hardness of the water is commonly measured in terms of

Magnesium carbonate equivalents
Calcium sulphate equivalents
Magnesium sulphate equivalents
Calcium carbonate equivalents

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Chemistry
The gas used to dilute oxygen for breathing by deep sea divers is:

Neon
Helium
Argon
Nitrogen

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Chemistry
Which among the following is used to dilute oxygen in the gas cylinders used by divers ?

Neon
Helium
Argon
Krypton

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Chemistry
The resources which can be used continuously, year-after -year are called

Renewable
Non-renewable
Abiotic
Biotic

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