Chemistry - s Block Elements Question with Solution | TestHub
Chemistrys Block ElementsGeneralEasy2 minPYQ_2020
ChemistryEasysingle choice
In curing cement plasters water is sprinkled from time to time. This helps in
Options:
Answer:
B
Solution:
Water develops interlocking needle-like crystals of hydrated silicates. The reactions involved are the hydration of calcium aluminates and calcium silicates which change into their colloidal gels. At the same time, some calcium hydroxide and aluminium hydroxides are formed as precipitates due to hydrolysis. Calcium hydroxide binds the particles of calcium silicates together while aluminium hydroxide fills the interstices rendering the mass impervious.
Stream:NTA_ABHYASSubject:ChemistryTopic:s Block ElementsSubtopic:General
⏱ 2mℹ️ Source: PYQ_2020
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