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Chemistry

Chemistry
Among the following, carbonate ore of Zinc is

Zincite
Sphalerite
Zincblende
Calamine

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Chemistry
Which one of the following statements is not correct? Vulcanisation of rubber makes it

Soft and flexible
Withstand higher temperatures
Strong and hard
Chemical resistant

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Chemistry
Which one of the following organic compound is used to remove stains of iron compounds?

Benzoic acid
Oxalic acid
Cinnamic acid
Phthalic acid

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Chemistry
The metal that is used as a catalyst in the hydrogenation of oils is

Ni
Pb
Pt
Cu

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Chemistry
Charcoal is used in water treatment as a/an

Absorbent
Coagulant
Solvent
Adsorbent

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Chemistry
PH value between 6.5-7.5 makes the soil

Acidic
Neutral
Basic
None of these

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