During white-washing of walls, slaked lime reacts slowly with carbon dioxide in air to form a thin layer of calcium carbonate on the walls. Which of the following reactions represents this correctly?
CaO (s) + CO₂ (g) → CaCO₃ (s)
CaO (s) + CO₂ (g) → CaCO₃ (g)
Ca(OH)₂ (s) + CO₂ (g) → CaCO₃ (s) + H₂O (l)
Ca(OH)₂ (aq) + CO₂ (g) → CaCO₃ (s) + H₂O (l)
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