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Chemistry

Chemistry
Which of the following is used as non-stick coating for cooking utensils?

Teflon
Perspex
Polystyrene
Styrofoam

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Chemistry
Among the following, carbonate ore of Zinc is

Sphalerite
Zincite
Zincblende
Calamine

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Chemistry
Except mercury which is the other metal that is liquid at standard conditions for temperature and pressure

Barium
Bromine
Magnesium
Lead

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Chemistry
'Atomic theory' of matter was given by

Avogadro
Newton
Pascal
Dalton

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Chemistry
One property of ammonia is

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

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Chemistry
The gas used to dilute oxygen for breathing by deep sea divers is:

Neon
Helium
Argon
Nitrogen

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