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Chemistry

Chemistry
Which one of the following does not contain Silver ?

German Silver
Horn Silver
Ruby Silver
Lunar Caustic

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Chemistry
Citric acid is present in free form in

Milk
Apple
Tamarind
Lemon

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Chemistry
Stains of rust on clothes can be removed by :

H2O2
Alcohol
Oxalic acid
Petrol

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Chemistry
The enzyme that converts glucose to ethyl alcohol is :

Invertase
Diastase
Maltase
Zymase

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Chemistry
The inert gas used as beacon light is

Kr
Ar
He
Ne

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Chemistry
The luster of a metal is due to

presence of free electrons
its chemical inertness
its high density
its high polishing

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