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Give reason : (i) Ionic compounds in s...

Give reason :
(i) Ionic compounds in solid state do not conduct electricity, whereas in molten state are good conductors of electricity.
(ii) Silver articles when exposed to air gradually turn blackish.
(iii) Chemical reaction does not take place when copper is added to iron sulphate solution.

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Give reasons : i) lonic compounds in solid state do not conduet electricity, whereas in molten state are good conductors of electricity. (ii) ii) Silver articles when exposed to air gradually turn blackish. ii) Chenmical reaction does not take place when copper is added to iron sulphate solution.

Give reason: Chemical reaction does not take when copper is added to iron sulphate solution.

Ionic compounds can conduct electric current when molten. Give reason. OR A molten salt which conducts electric currents does not do so on solidification. Explain.

Give reasons for the following : (i) Metals are good conductors of electricity whereas non-metals are not. (ii) Ionic compounds have usually high melting and boiling points.

Give reason for the following : (i) Ionic compound have high melting and boiling points. (ii) Ionic compounds are soluble in water. (iii) Ionic compounds conduct electricity in molten state.

Give reasons for the following : (i) Ionic compounds have high melting point and boiling point. (ii) Ionic compounds conduct electricity in molten state. (iii) Ionic compounds are solids at room temperature and are somewhat hard.

What would you observe when zinc is added to a solution of iron (II) sulphate ? Write the chemical reaction that take place

When a copper wire was left in silver nitrate solution for sometime, it was observed that the solution turned bluish green. (i) Explain the observation . (ii) Write the balanced chemical equation to represent the change taking place.

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