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Chemistry

Chemistry
Total number of naturally occurring elements

98
62
110
92

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Chemistry
Earth’s atmosphere is an envelope of gases extending to a height of

200 km
300 km
150 km
100 km

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Chemistry
Sodium Carbonate is commonly known as

Caustic Soda
Washing Soda
Baking Soda
Caustic Potash

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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

C
B
A
D

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Chemistry
The acid used in lead storage cells is

Hydrochloric acid
Phosphoric acid
Nitric acid
Sulphuric acid

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Chemistry
In its reaction with silver nitrate, C2H2 shows

Acidic property
Oxidising property
Basic property
Reducing property

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MORE MCQ ON Chemistry

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