Short Answer TypeState one relevant observation for the following :
Lead nitrate solution is treated with sodium hydroxide solution drop wise till it is excess.
State one relevant observation for each of the following:
At the anode, when molten lead bromide is electrolyzed using graphite electrodes.
State one relevant observation for the following:
Lead nitrate solution is mixed with dilute hydrochloric acid and heated.
State one relevant observation for the following:
Anhydrous calcium chloride is exposed to air for some time.
State one relevant observation for the following:
Barium chloride solution is slowly added to sodium sulphate solution.
Give a reason for each of the following :
Ionic compounds have a high melting point.
Ionic compounds do not exist as molecules but exist as aggregates of a large number of positive and negative ions due to strong electrostatic attractions. The number of ions in an aggregate depends on the relative size of positive and negative ions. Thus ionic compounds have high melting points because considerable energy is required to break these aggregates.
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