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Chemistry

Chemistry
The main constituent of natural gas is

Methane
Propane
Butane
Ethane

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Chemistry
The non-metal found in the liquid state is

Bromine
Chlorine
Fluorine
Nitrogen

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Chemistry
Maximum permissible concentration of copper in drinking water in mg/L is

2
0.01
1
0.05

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Chemistry
Which metal is the heaviest in periodic table among the following ?

Pb
W
Os
Pt

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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

A
D
C
B

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Chemistry
________ is used for making vinegar.

Malic acid
Tartaric acid
Acetic acid
Oxalic acid

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