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Chemistry

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

Passivation
Erosion
Abrasion
Corrosion

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Chemistry
If the equilibrium constants for the systems H2 + I2 ? 2HI and 2HI ? H2 + I2 are K1 and K2 respectively, the relationship between K1 and K2 is :

K1 = K2
K1 = 2K2
K1 = K2/2
K 1 = 1 /K2

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Chemistry
Of the following, which one pollutes the air of a big city ?

Copper
Lead
Cadmium
Chromium

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

Graphite
Silicon
Phosphorus
Sodium

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Chemistry
Ozone depletion in the stratosphere is mainly caused by

SO2
NO2
NO
Chlorogluorocarbons

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Chemistry
Which of the following is not a derivative of barbituric acid

Veronal
Nembutal
Equanil
Amytal

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