Preparation of looking mirrors involves the use of : (a) red lead (b) ammonical silver nitrate P...

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Preparation of looking mirrors involves the use of :
(a) red lead
(b) ammonical silver nitrate
P
(c) ammonical \( \mathrm{AgNO}_{3}+ \) red lead
(d) ammonical \( \mathrm{AgNO}_{3}+ \) red lead \( +\mathrm{HCHO} \)
W.
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