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Chemistry

Chemistry
The number of waves in n x 10th Bohr's orbit are

n-2
n2
n3
n

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Chemistry
Sulphur dioxide bleaches colouring matter by :

Decomposition
Reduction
Dehydration
Oxidation

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Chemistry
Among the following iron ores, the highest percentage of iron content is found in–

Haemetite
Limnonite
Magnetite
None of these

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Chemistry
The three elements most needed in common fertilisers are :

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

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Chemistry
The Fungus which is used in the alcohol industry is

Rhizopus
Candida Aibicans
Mushroom
Yeast

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Chemistry
Which one of the following is not a cause for present global warming and climate change ?

CFC emission
Deforstation
Carbondioxide emission
Methane emission

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