Mention the range of $pH$ value for identification of a base.
- A$0-7$
- B$7-14$
- C$0-14$
- D$7$
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What happens when a solution of an acid is mixed with a solution of a base in a test tube?
$(i)$ The temperature of the solution increases
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$(iii)$ The temperature of the solution remains the same
$(iv)$ Salt formation takes place
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