A) be neutral
B) be basic
C) turn phenolphthalein solution pink
D) turn methyl orange red
Correct Answer: C
Solution :
For 20 mL of \[0.5\text{ }N\text{ }HCl\] \[{{N}_{1}}{{V}_{1}}=0.5\times 20=10\] For 35 mL of \[0.1\text{ }NaOH\] \[{{N}_{2}}{{V}_{2}}=0.1\times 35=3.5\] \[\because \] \[{{N}_{1}}{{V}_{1}}>{{N}_{2}}{{V}_{2}}\] \[\therefore \]Solution will be acidic in nature. Due to acidic nature of solution, the colour of phenolphthatein becomes pink.
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