A) washing soda is expensive.
B) washing soda is easily decomposed.
C) washing soda reacts with Al to form soluble aluminate.
D) washing soda reacts with Al to form insoluble aluminium oxide.
Correct Answer: C
Solution :
[c] Washing soda reacts with Al to form soluble aluminate \[2Al+NaC{{O}_{3}}+3{{H}_{2}}O\] \[\xrightarrow{{}}2NaAl{{O}_{2}}+C{{O}_{2}}+3{{H}_{2}}\]
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