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Chemistry

Chemistry
The polymer obtained by the condensation of hexamethylene diamine and adipic acid is :

Bakelite
Terylene
Tollen's
Nylon 66

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Chemistry
Which of the following is not a chemical reaction'?

Conversion of water into steam
Digestion of food
Burning of coal
Burning of paper

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Chemistry
Which metal does not undergo corrosion due to the formation of oxide layer?

Iron
Aluminium
Zinc
Copper

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Chemistry
The three elements most needed in common fertilisers are :

Calcium, Phosphorous and Potassium
Phosphorous, Sodium and Nitrogen
Nitrogen, Potassium and Phosphorous
Sulphur, Phosphorous and Sodium

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Chemistry
Which of the following metals causes Itai-Itai disease ?

Chromium
Cobalt
Copper
Cadmium

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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 odourless gas
It is a yellowish gas

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