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Chemistry

Chemistry
Which of the following metals is used in Space Crafts to withstand high temperatures ?

Ti
Fe
Pb
Ni

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Chemistry
Bleaching powder is prepared by passing :

Carbon dioxide over slaked lime
Oxygen over slaked lime
Chlorine over slaked lime
Chlorine over quick lirne

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Chemistry
The coating of a thin layer of zinc on steel or iron objects is known as

Galvanising
Electroplating
Hot dipping
Tinning

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Chemistry
Which is the purest commercial form of iron ?

Pig iron
Stainless steel
Wrought iron
Steel

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Chemistry
The oxidation number of nickel in K4[Ni(CN)4] is

4
Zero
8
–4

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Chemistry
Iodine can be separated from a mixture of Iodine and Potassium Chloride by

Filtration
Sublimation
Distillation
Sedimentation

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