Some substances are commonly used for removing acidic gases. Which of the following is commonly used in the chemical industry for the removal of hydrogen sulphide from coal gas?

Milk of magnesia

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Slaked lime

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Quick lime

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Sodium hydride

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Solution

The correct option is C Slaked lime
Slacked lime react with hydrogen sulphide $(H_{2} s)$ to form soluble biscuit
$C a (O H)_{2} + H_{2} S \to C a S + H_{2} O$

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