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Chemistry

Chemistry
The deterioration of a metal by an electrochemical process is commonly termed as

Passivation
Erosion
Corrosion
Abrasion

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Chemistry
Which of the following is used as anesthetic ?

NO
NH3
NO2
N2O

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Chemistry
Which mineral is the ore of aluminium ?

Haematite
Bauxite
Magnetite
Siderite

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Chemistry
This group of alumino-silicate minerals is widely used in making electrical insulators

Mica
Manganese
Chromite
Bauxite

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Chemistry
When ice cubes are made, the entropy of water

Does not change
Increases
May either increase or decrease depending on the process used
Decreases

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Chemistry
The hydronium ion is

HO -
H+
H3O+
H2+

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