MCQ
The compound that is white in color is
- Aammonium sulphide
- ✓lead sulphate
- Clead iodide
- Dammoniumarsinomolybdate
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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:


$(I)$ $ Ph -COCH_3$
$(II)$ $CH_3 -CO -CH_3$
$(III)$ $CH_3 -CHO$
$(IV)$ $Ph -COCH_2 -CH_3$