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Chemistry

Chemistry
Which one of the following is most acidic

MgO
CaO
Al22O3
Na2O

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Chemistry
Nitrification is the biological process of converting

N2into nitrite
Ammonia into nitrite
N2 into nitrate
Ammonia into N2

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Chemistry
Citric acid is present in free form in

Tamarind
Lemon
Apple
Milk

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Chemistry
The metal extracted from Bauxite is :

Copper
Manganese
Aluminum
Silver

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Chemistry
In arc welding, Argon is used because of its

High flammability
Ability to lower the melting point of the metal
Low reactivity with metal
High calorific value

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Chemistry
Type metal used in printing press is an alloy of

Lead and antimony
Lead and copper
Lead and zinc
Lead and bismuth

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MORE MCQ ON Chemistry

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