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Chemistry

Chemistry
A pungent smell often present near the urinals is due to

Chlorine
Ammonia
Urea
Sulphur-di- oxide

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Chemistry
The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are

Dry ice or frozen carbon dioxide
All listed here
Silver Iodide
Sodium Chloride

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Chemistry
Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ?

Borax
Sodium chloride
Saltpetre
Hydrogen peroxide

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Chemistry
Interveinal necrotic spots on leaves appear due to

SO2injury
NO2injury
HF injury
O3injury

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Chemistry
Wax used for making candle is chemically a mixture of

Aliphatic and aromatic hydrocarbons
Aliphatic hydrocarbons
Cyclic hydrocarbons
Aromatic hydrocarbons

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Chemistry
The hottest part of the gas flame is known as

blue zone
luminous zone
non-luminous zone
dark zone

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