Chemistry
Fill up the blanks with the correct choice given in brackets.
(i) Ionic or electrovalent compounds do not conduct electricity in their …………… state. (fused / solid)
(ii) Electrolysis of aqueous sodium chloride solution will form …………… at the cathode. (hydrogen gas / sodium metal)
(iii) Dry hydrogen chloride gas can be collected by…………… displacement of air. (downward / upward)
(iv) The most common ore of iron is …………… (calamine / haematite)
(v) The salt prepared by the method of direct combination is …………… (iron (II) chloride / iron (III) chloride)
Chemical Bonding
ICSE 2018
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Answer
(i) Ionic or electrovalent compounds do not conduct electricity in their solid state.
(ii) Electrolysis of aqueous sodium chloride solution will form hydrogen gas at the cathode.
(iii) Dry hydrogen chloride gas can be collected by upward displacement of air.
(iv) The most common ore of iron is haematite
(v) The salt prepared by the method of direct combination is iron (III) chloride.
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