The refractive index of diamond is 2.42. Comment
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The substance not likely to contain CaCO3 is
a) Dolomite
b) A marble statue
c) Calcined gypsum
d) Sea shells.
The chemical reaction between MnO
a) displacement reaction
b) combination reaction
c) redox reaction
d) decomposition reaction.
Chlorine gas reacts with _______ to form bleaching powder.
a) dry Ca(OH)2
b) dil. solution of Ca(OH)
c) conc. solution of Ca(OH)
d) dry CaO
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