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Which compound of an element in period 3 reacts with water to form a solution with a pH greater than 7?
A. SiO2
B. SiCl4
C. NaCl
D. Na2O

Sagot :

Nekoneko
The answer is D. Nasub(2)O. 
Nasub(2)O + H2O --> 2 NaOH 
Nasub(2)O solution has pH much higher than 7 
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