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Chemistry

Chemistry
When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to

SO3
NO2
N2O
SO2

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Chemistry
The chemical used for cloud seeding for artificial rains is

Potassium Nitrate
Silver Nitrate
Potassium Bromide
Silver Iodide

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Chemistry
Ozone consists of

Hydrogen and Carbon
Oxygen only
Oxygen and Carbon
Oxygen and Nitrogen

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Chemistry
Which one is the simplest aromatic hydrocarbon

Picric acid
Aspirin
Benzene
Chloride

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Chemistry
Which of the following is used as a preservative to protect processed food?

BHT
Sodium sulphate
Saccharin
Sodium metabisulphite

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Chemistry
The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :

Galvanization
Vulcanization
Alloy formation
Zinc plating

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