Give reason for the following :
A. A solution of sports electrolyte drink conducts electricity, but coconut oil does not.
B. Milkiness disappears when excess of carbon dioxide is passed through lime water.
C. An iron bridge near the sea rusts much faster than an iron bridge located in a dry hilly region.
Answers (1)
A. A sports drink contains ions (electrolytes) which help conduct electricity. Coconut oil does not contain ions so it cannot conduct electricity.
B. Limewater turns milky due to the formation of insoluble calcium carbonate (\(CaCO_3\)). When excess \(CO_2\) is passed, calcium carbonate reacts further to form soluble calcium hydrogen carbonate, causing the milkiness to disappear.
C. Air near the sea contains high moisture (humidity), which speeds up rusting. In a dry hilly region, moisture is low, so rusting occurs much slowly.