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Chemistry

Chemistry
Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?

Butane
Methane
Ethane
Propane

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Chemistry
Cement is usually a mixture of :

Calcium aluminate and calcium ferrate
Calcium silicate and calcium ferrate
Lime stone and silicon dioxide
Calcium silicate and calcium aluminate

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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 :

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

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

Erosion
Passivation
Abrasion
Corrosion

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Chemistry
The acid present in red ants is

Butyric acid
Formic acid
Acetic acid
Caproic acid

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Chemistry
Acid rain' is caused due to air - pollution by

Nitrous oxide and sulphur dioxide
Methane
Carbon monoxide
Carbon dioxide

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