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Chemistry

Chemistry
Which of the following acts as promoter for iron in Haber's process

Mn
Mo
Mg
W

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Chemistry
Which of the toxic heavy metals is found in modern tannery industries ?

Lead
Nickel
Zinc
Chromium

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Chemistry
Stainless steel is an alloy of

Chromium and iron
Chromium and carbon
Carbon and iron
Chromium, carbon and iron

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Chemistry
Which of the following laser types is used in a laser printer?

Semiconductor laser
Excimer laser
Gas laser
Dye laser

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Chemistry
Hard water and soft water can be distinguished by using

Dilute acid
Detergent
Ordinary soap
Liquid soap

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Chemistry
Sea weeds are important source of

Chlorine
Bromine
Iron
Iodine

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