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Chemistry

Chemistry
A fertile soil is likely to have a pH of

9
14
43989
3

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Chemistry
The main component of liquid bleach is:

Sodium hypochlorite
Sodium chloride
Sodium hypochlorate
Hydrochloric acid

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Chemistry
Physico-chemical characteristics of water in water sources undergo changes due to

Aquatic macrophytes
Evapotranspiration
Auatic fungi
Effluents

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Chemistry
Silicon is used in

Solar energy devices
Transistors
Semiconductors
All of these

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Chemistry
Food cans are coated with tin and not with zinc because

Zinc is costlier than tin
Zinc is less reactive than tin
Zinc has a higher melting point than tin
Zinc is more reactive than tin

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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
C
B
D

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