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

D
C
B
A

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Chemistry
All isotopes of the same element have ________

The same atomic number but different atomic masses
The same atomic number and the atomic mass
Different atomic numbers and different atomic mass
Different atomic numbers and the same atomic mass

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