Chemistry
One property of ammonia is

It is a yellowish gas
It is a odourless gas
It is insoluble in water
Its aqueous solution turns red litmus blue

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Chemistry
Man dies in the atmosphere of CO, because it

Dries up the blood
Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2
Reduces the organic matter of tissues
Combines with O2 present in the body

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