Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Chemical Reaction
Calcium oxide reacts vigorously with water to produce slaked lime whose solution is used for white-washing walls. This slaked lime reacts with component (A) in air to form a thin layer of component (B) to give a shiny finish. What are the components (A) and (B) ?
1
A - O2; B - CaCO3
2
A - CO2; B - Ca(OH)2
3
A - O2; Ca(OH)2
4
A - CO2; B - CaCO3
5
None of the above