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Chemistry

Chemistry
Isobars are lines joining places having equal

Rainfall
Height above sea-level
Pressure
Population

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Chemistry
Which one of the following gases has the highest calorific value?

Coal gas
Natural gas
Indane gas
Water gas

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Chemistry
Which of the following is the correct sequence of countries in terms of maximum carbon dioxide emission?

European Union, China, USA, India
China, India, European Union, USA
USA, India, China, European Union
China, USA, European Union, India

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Chemistry
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

p-electrons in CI(Z = 17)
d-electrons in Fe(Z = 26)
s-electrons in Mg(Z = 12)
p-electrons in Ne(Z = 10)

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Chemistry
Maximum permissible concentration of total hardness in drinking water is

50
200
100
500

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Chemistry
By-product obtained by soap industry is

Caustic soda
Caustic potash
Glycerol
Naphthalene

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