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Chemistry

Chemistry
Which of the following is used to remove rust stains on cloth?

Oxalic acid solution
Kerosene
Lime
Petrol

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Chemistry
Which variety of coal contains recognisable traces of the original plant material ?

Anthracite
Lignite
Peat
Bitumen

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Chemistry
Which type of fire extinguisher is used for petroleum fire ?

Foam type
None of these
Soda acid type
Powder type

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Chemistry
This group of alumino-silicate minerals is widely used in making electrical insulators

Manganese
Bauxite
Chromite
Mica

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Chemistry
Major gaseous pollutant of the thermal power station is

H2 S
NO2
NH3
SO2

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Chemistry
Smoke is formed due to

Gas dispersed in gas
Solid dispersed in gas
Solid dispresed in liquid
Gas dispresed in solid

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