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Question 73
A
CaNO3 + H2O  
B
Ca(NO3)2 + 2 H2O  
C
CaO + 2 NO2 + 3H2O  
D
Ca + 2 NO3 + 2 H2O  
Explanation.
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Correct Option:
B






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Question 79
A
most potassium compounds are less soluble in water  
B
most potassium compounds are quite soluble in water  
C
presence of other alkali metal ions has great influence on it  
D
magnesium ion is an alkaline earth metal ion.  
E
None of the above.  
Explanation.
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Correct Option:
B


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