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)?
A – 𝑂 2 O 2 ; B – 𝐶 𝑎 𝐶 𝑂 3 CaCO 3
A – 𝐶 𝑂 ; B – 𝐶 𝑎 ( 𝑂 𝐻 ) 2
A – 𝑂 2 ; B – 𝐶 𝑎 ( 𝑂 𝐻 ) 2
A – 𝐶 𝑂 2 ; B – 𝐶 𝑎 𝐶 𝑂 3
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy