Solve this chemistry question?

a) False
The products are water and NaCl solution. No solid is produced.

b) False
The reaction undergoes in aqueous solution, but no flame is produced.

c) False
The products are water and NaCl solution. No gas is produced.

d) True
HCl is acidic (pH < 7) and NaOH is alkaline (pH > 7), while the products are neutral (pH = 7). The change in pH indicates that new substance(s) is/are formed.

The answer: d) the pH level changes

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