If $C O_{2}$ is passed in excess into lime water, the milkiness first formed disappears due to

reversal of the original reaction

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formation of volatile calcium derivative

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formation of water soluble calcium bicarbonate

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the solution getting heated by exothermic reaction

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Solution

The correct option is C
formation of water soluble calcium bicarbonate

$C a O + C O_{2} \to C a C O_{3}$

$C a C O_{3} + H_{2} O + C O_{2} \to C a (H C O_{3})_{2}$

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Question 9

Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed?

(i) It is an endothermic reaction
(ii) It is an exothermic reaction
(iii) The pH of the resulting solution will be more than seven
(iv) The pH of the resulting solution will be less than seven

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (iii) and (iv)

Q. If

C O_{2}

is passed in excess into lime water, the milkiness first formed disappears due to

Q. If

C O_{2}

is passed in excess into lime water, the milkiness first formed disappears due to

Q. When excess of carbon dioxide is passed through lime water, the milkiness first formed disappears due to:

Q. when water id added to compound a of calcium solution of compound b is formed.when co2 is passed into the solution it turns milky due to the formation of compound c.if excess of co2 is passed into it solution milkiness disppears due to formation of compound d . identify a,b,c,d.explain why milkiness disappears.

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If CO2 is passed in excess into lime water, the milkiness first formed disappears due to

The correct option is C formation of water soluble calcium bicarbonate CaO + CO2 → CaCO3 CaCO3 + H2­O + CO2 → Ca(HCO3)2

If $C O_{2}$ is passed in excess into lime water, the milkiness first formed disappears due to

The correct option is C
formation of water soluble calcium bicarbonate

$C a O + C O_{2} \to C a C O_{3}$

$C a C O_{3} + H_{2} O + C O_{2} \to C a (H C O_{3})_{2}$