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Metal Deficiency defect: It is caused due to cation vacancy created by replacement of some valent ions by its higher charge ions. Example FeO with Fe3+. Where Fe2+ and Fe3+ both are present in lattice.
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A salt bridge is a laboratory device which maintains electrical neutrality within the internal circuit, connecting the oxidation and reduction half cells of a galvanic cell (voltaic cell). It consists of a U-shaped glass tube filled with agar-agar containing inert electrolyte like KCl or KNO3 which does not react with electrolyte-solutions present in half-cells.
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When acetaldehyde is heated with bleaching powder, to form chloroform. CH3CHO +3Cl2 → CCl3CHO +3HCl
2CCl3CHO + Ca(OH)2 → 2HCCl3 + Ca(HCOO)2
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