Sterling silver consists of ……….. silver.
a) 95.8%
b) 92.5%
c) 78.9%
d) 7.5%
Sterling silver consists of ……….. copper.
a) 95.8%
b) 92.5%
c) 78.9%
d) 7.5%
Electroplating of chromium is carried out in
a) electrolytic cell
b) galvanic cell
c) a & b both
d) Daniel cell
The preservatives are……...………
a) inorganic acids
b) organic acids
c) organic salts
d) inorganic
