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Chemistry

Chemistry
Extensively used nitrogenous fertilizer is

Urea
Ammonium nitrate
Ammonium sulphate
Nitro-lime

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Chemistry
Which of the following is usually not an air-pollutant?

Nitrous oxide
Sulphur dioxide
Hydrocarbons
Carbon dioxide

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Chemistry
The percentage of carbon in cost iron is :

0.5 to 1.5
0.01 to 0.25
3 to 5
6 to 8

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Chemistry
Match the List-I with List-II and select the correct answer using the codes given below the listsList-I (Green house gas)List-II(Major source)F.Carbondioxide1.Enteric fermentation in cattleG.Methane2.Burning of fossilH.Chloroflro carbons3.Mercury compounds in waste waterJ.Nitrous oxide4.Nylon production 5.Air conditioner and refrigeration unitsCodes :FGHJA.2154B.3421C.3241D.1234

B
A
D
C

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Chemistry
What is the atomic number of Oxygen

22
8
12
5

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Chemistry
Which one element from below list is liquid at room temperature

Bromine
Lead
Argon
Zinc

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