Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
What is the chemical name of the compound formed when quicklime reacts with water?
Calcium hydroxide
Calcium carbonate
Calcium oxide
Calcium chloride
Calcium hydroxide
When quicklime (calcium oxide) reacts with water, it undergoes a vigorous combination reaction to form slaked lime, whose chemical name is calcium hydroxide. This process forms a clear alkaline solution or suspension known as lime water.
When quicklime (calcium oxide) reacts with water, it undergoes a vigorous combination reaction to form slaked lime, whose chemical name is calcium hydroxide. This process forms a clear alkaline solution or suspension known as lime water.
It is similar to mixing dry plaster or cement with water, which rapidly generates heat and transforms a dry powder into a reactive, pasty substance.
CaO (Calcium Oxide / Quicklime) + HтВВO тЖТ Ca(OH)тВВ (Calcium Hydroxide / Slaked lime): Think of 'CaO' drinking water to expand into 'Ca(OH)2'.
CaO+H2тАЛOтЖТCa(OH)2тАЛ тАФ Formation of calcium hydroxide from quicklime
The chemical mechanism involves calcium oxide combining directly with water molecules to yield calcium hydroxide. Represented by the equation CaO+H2тАЛOтЖТCa(OH)2тАЛ, this process is highly exothermic, meaning it releases a large amount of heat energy.
Quicklime is chemically known as calcium oxide with the formula CaO.
Slaked lime is chemically known as calcium hydroxide with the formula Ca(OH)2тАЛ.
The reaction is a classic example of a combination and exothermic reaction.
Generates slaked lime efficiently for industrial and agricultural use.
The intense heat released can cause boiling, splattering, and severe skin or eye burns.
Whitewashing walls
Neutralizing acidic soil in agriculture
Manufacture of bleaching powder
Option B (Calcium carbonate, CaCO3тАЛ) is limestone, which is formed when carbon dioxide is passed through lime water.
Option C (Calcium oxide, CaO) is the starting reactant, not the product.
Option D (Calcium chloride, CaCl2тАЛ) is a salt produced by reacting calcium carbonate with hydrochloric acid.
A is correct тАФ The chemical name of the compound formed when quicklime reacts with water is calcium hydroxide.
Memorize the trio: Quicklime (CaO),Slaked lime (Ca(OH)_2), and Limestone (CaCO_3), as questions frequently interchange these common and chemical names in railway and competitive exams.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants