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Chemistry

Chemistry
Threshold limit value of copper in the atmospheric air is

0.01 mg/m3
5.0 mg/m3
1.0 mg/m3
0.001 mg/m3

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Chemistry
Bayer's reagent is

Alkaline potassium permanganate
Acidified potassium permanganate
Bromine water
Hydrogen peroxide

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Chemistry
By-product obtained by soap industry is

Naphthalene
Caustic potash
Glycerol
Caustic soda

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Chemistry
Interveinal necrotic spots on leaves appear due to

HF injury
NO2injury
SO2injury
O3injury

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Chemistry
Among the fuels given below, the one with highest calorific value is

Coke
Natural gas
Wood
Coal

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Chemistry
Which one of the following is an example of a gel ?

Milk
Shaving cream
Cheese
Face cream

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