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Chemistry

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

Chlorine
Urea
Ammonia
Sulphur-di- oxide

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Chemistry
Cyanide poisoning causes death in seconds because

It causes cardiac arrest
It denatures enzymes of the heart/muscle
It breaks the electron transport chain
It causes Lysis of red blood cells

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

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

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Chemistry
The heat energy produced when the human body metabolises 1 gram of fat is

1 KJ
30 KJ
39 KJ
29 KJ

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Chemistry
The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon ?

18
Zero
12
6

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Chemistry
The aqueous solution of potassium chloride is

Initially weak and then become a strong electrolyte
A strong electrolyte
A non-electrolyte
A weak electrolyte

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