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Chemistry

Chemistry
The most abundant metal in the Earth’s crust is

Iron
Copper
Zinc
Aluminium

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Chemistry
Setting of plaster of paris involves

Dehydration process
Reduction process
Hydration to form other hydrates
Oxidation process

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Chemistry
Of the following, which one pollutes the air of a big city ?

Lead
Cadmium
Chromium
Copper

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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
Chloroform can be used as

Anaesthetic
Antibiotic
Analgesic
Antimalarial

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Chemistry
The metal compound commonly found in Sindhoor or Kumkum is based on

Zinc
Copper
Tin
Lead

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