MCQ
The $pH$ of a solution having $[{H^ + }] = 10 \times {10^{ - 4}}\,\,moles/litre$ will be
- A$1$
- B$2$
- ✓$3$
- D$4$
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$2\left[ Au ( CN )_2\right]_{( aq )}^{-}+ Zn ( s ) \rightarrow 2 Au ( s )+\left[ Zn ( CN )_4\right]_{( aq )}^{2-}$
$A.$ Redox reaction
$B.$ Displacement reaction
$C.$ Decomposition reaction
$D.$ Combination reaction
Choose the correct answer from the options given below: