Question

chalcopyrites is an ore of copper with composition—
(A)Cu2S.Fe2S3
(B)CuCO3.Cu(OH)2
(C)2CuCO3.Cu(OH)2
(D)Cu2S​

Answer 1

$\bold{CuFeS_2}$

$\color{lime}\rule{200000000 pt}{2pt}$

$\begin{gathered}\begin{array}{| c | c | c |}\hline \bf Atomic\:No. & \bf Elements & \bf Valency \\ \hline 1 &\sf Hydrogen & 1 \\ \hline2 &\sf Helium & 0 \\ \hline 3 &\sf Lithium & 1 \\ \hline 4 &\sf Berrylium & 2 \\ \hline 5 &\sf Boron & 3 \\ \hline 6 &\sf Carbon & 4 \\ \hline 7 &\sf Nitrogen & 3 \\ \hline 8 &\sf Oxygen & 2 \\ \hline9 &\sf Flourine & 1 \\ \hline 10 &\sf Neon & 0 \\ \hline 11 &\sf Sodium & 1 \\ \hline12 &\sf Magnesium & 2 \\ \hline 13 &\sf Aluminium & 3 \\ \hline14 &\sf Silicon & 4 \\ \hline 15 &\sf Phosphorus & 3 \\ \hline16 &\sf Sulphur & 2 \\ \hline 17 &\sf Chlorine & 1 \\ \hline18 &\sf Argon & 0 \\ \hline19 &\sf Potassium & 1 \\ \hline 20 &\sf Calcium & 2 \\ \hline 21 &\sf Scandium & 3 \\ \hline 22 &\sf Titanium & 4 \\ \hline 23 &\sf Vanadium & 5,4 \\ \hline24 &\sf Chromium & 2 \\ \hline25 &\sf Manganese & 7,4,2 \\ \hline 26 &\sf Iron & 2,3 \\ \hline27 &\sf Nickel & 3,2 \\ \hline 28 &\sf Cobalt & 2 \\ \hline29 &\sf Copper & 2,1 \\ \hline 30 &\sf Zinc & 2 \\ \hline\end{array}\end{gathered}$