Chemistry - Complete s-block Question with Solution | TestHub

ChemistryComplete s-blocks-block IIAMedium2 minQB

ChemistryMediumsingle choice

Select the correct statement :-

Options:

Answer:

Solution:

Identify $X$ : Reacting lime water $C a (O H)_{2}$ with limited $C O_{2}$ gas yields calcium carbonate, so $X$ is $C a C O_{3}$ .

Identify $Y$ : Balancing the main reaction $C a (O H)_{2} + N a H C O_{3} \to C a C O_{3} + Y + H_{2} O$ identifies $Y$ as $N a O H$ .

Verify Option B: Calcium carbonate ( $C a C O_{3}$ ) is a widely known white precipitate (ppt), making statement (B) correct.

Incorrect Options: $X$ is a basic salt (not acidic), and $Y$ ( $N a O H$ ) forms highly soluble compounds with both zinc hydroxide and excess $C O_{2}$ .

Stream:JEESubject:ChemistryTopic:Complete s-blockSubtopic:s-block IIA

⏱ 2mℹ️ Source: QB

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