A colourless solution of solid X has lost its label. Possible identities of X are shown. 1. sodium carbonate
2. sodium hydroxide
3. sodium chloride
The solution reacts with an acid, forming a salt and water only.
What could X be?
1 )
1 only
2 )
1 or 2 only
3 )
1, 2 or 3
2 only
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