Answer:
The correct answer is - Statement I is true, Statement-II is false.
Explanation:
The answer is Three
!!!!!!
Answer: I think they form on the Hawaiian islands because of the volcano.
Explanation: The heat may help them form,hope this helps.
Answer:
Anhydrous sodium carbonate is stable to heat and does not decompose even when it is heated to redness. This is because sodium carbonate salt on heating with acids react to release carbon dioxide.
Answer:

Explanation:
The given reactions are:
PbCl2(aq)⇌Pb2+(aq)+2Cl−(aq) 
AgCl(aq)⇌Ag+(aq)+Cl−(aq) 
Required reaction is:
PbCl2(aq)+2Ag+(aq)⇌2AgCl(aq)+Pb2+(aq)
