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Chemistry

Chemistry
Which of the following fuels causes minimum environmental pollution?

Coal
Diesel
Hydrogen
Kerosene

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Chemistry
Green house effect is accelerated by

Rapid industrialization
All of these
Increased transportation activity
Deforestation

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Chemistry
The important ore of aluminium is

Fluorspar
Haematite
Bauxite
Cryolite

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Chemistry
Who first published the periodic table

Julius Lothar Meyer
John Dalton
Dmitri Mendeleev
Henry Moseley

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Chemistry
Entropy of Universe is always

Constant
Decreasing
Increasing
Zero

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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 = K2/2
K1 = K2

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