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Chemistry

Chemistry
Colour imparted to the Bunsen flame by strontium salt is

Brick red
Crimson red
Apple-green
Bluish green

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Chemistry
Which one is not a pure form of carbon

Diamond
Coal
Gold
Graphite

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Chemistry
Which of the following appeared to be with a significant potential for accumulation through food chains ?

Parathion
Carbary
DDT
Lindane

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Chemistry
Detergents are

Sodium salts of fatty acids
None of these
Sodium salt of benzoic acid
Sodium salts of sulphonic acids

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Chemistry
Vinegar is an aqueous solution of

Acetic acid
Citric acid
Hydrochloric acid
Oxalic acid

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Chemistry
The three elements most needed in common fertilisers are :

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

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