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Chemistry

Chemistry
Which one of the following elements is used in the manufacture of safety matches?

Sodium
Graphite
Silicon
Phosphorus

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Chemistry
The metal compound commonly found in Sindhoor or Kumkum is based on

Zinc
Lead
Copper
Tin

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Chemistry
The mineral containing both magnesium and calcium is

calcite
carnallite
dolomite
magnesite

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Chemistry
Which one of the following is not coal variety?

Peat
Dolomite
Lignite
Bituminous

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Chemistry
________ is used for making vinegar.

Oxalic acid
Malic acid
Acetic acid
Tartaric acid

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Chemistry
Which of the following is the best fuel in terms of energy released per gram of fuel?

Hydrogen
Butane
Ethanol
Methane

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