Q. 23 D4.4( 5 Votes )
Give reason why:
Lime water turns milky when CO3 is passed through it?
When limewater (CaOH)2 is passed through CO2, the following reaction takes place:
(CaOH)2 + CO2→ CaCO3 + H2O
i. In this reaction, when limewater comes in contact with the gas released in the form of an effervescence, it turns milky. This
chemical test for carbon dioxide gas.
ii. When limewater turns milky, it is confirmed that the effervescence is of carbon dioxide.
Rate this question :
Which among the following statement(s) is(are) true? Exposure of silver chloride to sunlight for a long duration turns grey due to:
(i) The formation of silver by decomposition of silver chloride
(ii) Sublimation of silver chloride
(iii) Decomposition of chlorine gas from silver chloride
(iv) Oxidation of silver chlorideEvergreen Science
Which of the following are exothermic processes?
(i) Reaction of water with quicklime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)Evergreen Science