The catalyst used in the contact process is
Copper
Iron
Vanadium pentoxide
Manganese dioxide
C.
Vanadium pentoxide
V2O5 is used in the contact process.
Fill up the blanks with the correct choice given in brackets.
Electrolysis of aqueous sodium chloride solution will form ________ at the cathode. (Hydrogen gas / Sodium metal)
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The most common ore of iron is ________. (Calcium / Haematite)
Fill up the blanks with the correct choice given in brackets.
Dry hydrogen chloride gas can be collected by ________ displacement of air. (downward / upward)
The salt solution which does not react with ammonium hydroxide is:
Calcium Nitrate
Zinc Nitrate
Lead Nitrate
Copper Nitrate
Fill up the blanks with the correct choice given in brackets.
The salt prepared by the method of direct combination is _______. (iron (II) chloride / iron (III) chloride)
Fill up the blanks with the correct choice given in brackets.
Ionic or electrovalent compounds do not conduct electricity in their _______ state. (fused/solid)