Question 21 markMCQSection A

$The balanced chemical equation showing reaction between quicklime and water is :$

$\mathrm{CaO} + \mathrm{H}_2\mathrm{O}\longrightarrow \mathrm{Ca(OH)}_2 + \mathrm{Heat}$

Chemical Reactions and Equations

Chemical Equations

Options

(a)

2\mathrm{CaO} + \mathrm{H}_2\mathrm{O}\longrightarrow 2\mathrm{CaOH} + \mathrm{H}_2 + \mathrm{Heat}

(b)

\mathrm{CaO} + \mathrm{H}_2\mathrm{O}\longrightarrow \mathrm{Ca(OH)}_2 + \mathrm{H}_2 + \mathrm{Heat}

(c)

\mathrm{CaO} + \mathrm{H}_2\mathrm{O}\longrightarrow \mathrm{Ca(OH)}_2 + \mathrm{Heat}

(d)

2\mathrm{CaO} + 3\mathrm{H}_2\mathrm{O}\longrightarrow 2\mathrm{Ca(OH)}_3 + \mathrm{O}_2 + \mathrm{Heat}

\mathrm{CaO} + \mathrm{H}_2\mathrm{O}\longrightarrow \mathrm{Ca(OH)}_2 + \mathrm{Heat}

quicklime

water

calcium hydroxide

heat

Hint

$Quicklime reacts with water to form calcium hydroxide and heat$

Quick oral answer

$The reaction between quicklime and water produces calcium hydroxide and heat$

\mathrm{CaO} + \mathrm{H}_2\mathrm{O}\longrightarrow \mathrm{Ca(OH)}_2 + \mathrm{Heat}

$Quicklime is highly reactive and can cause burns$

$Calcium hydroxide is used in construction and paper production$

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$This question carries 1 mark in the CBSE Class 10 Science 2023 examination.$

$This question is from the chapter "Chemical Reactions and Equations" in the CBSE Class 10 Science syllabus.$

$This question covers the topic "Chemical Equations" from CBSE Class 10 Science.$

$This is a MCQ question from Section A in the CBSE Class 10 Science 2023 paper.$