(A) $X$ is Sodium hydrogen carbonate $(NaHCO_3)$.$Y$ is Carbon dioxide $(CO_2)$.$Z$ is Sodium carbonate $(Na_2CO_3)$.When $NaHCO_3$ is heated, it deco

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$X = NaHCO_3, Y = CO_2, Z = Na_2CO_3$

(A) $X$ is Sodium hydrogen carbonate $(NaHCO_3)$.$Y$ is Carbon dioxide $(CO_2)$.$Z$ is Sodium carbonate $(Na_2CO_3)$.When $NaHCO_3$ is heated, it decomposes to form sodium carbonate, water, and carbon dioxide:$2NaHCO_3(s) \xrightarrow{\text{Heat}} Na_2CO_3(s) + H_2O(l) + CO_2(g)$When $CO_2$ is passed through lime water $[Ca(OH)_2]$, it forms calcium carbonate, which makes the solution milky:$Ca(OH)_2(aq) + CO_2(g) \rightarrow CaCO_3(s) + H_2O(l)$

Class 10 Science Acids, Bases and Salts Salts and their Uses

Difficult

$A$ compound $X$ is a constituent of baking powder. It is used as an antacid. When $X$ is heated, it releases a gas $Y$ which, when passed through lime water, turns it milky, and a salt $Z$ is formed, which is the main constituent of washing powder. Identify $X, Y$, and $Z$. Write balanced chemical equations for the reactions involved.

A
$X = NaHCO_3, Y = CO_2, Z = Na_2CO_3$
B
$X = Na_2CO_3, Y = CO_2, Z = NaHCO_3$
C
$X = NaHCO_3, Y = CO, Z = Na_2CO_3$
D
$X = Na_2CO_3, Y = CO_2, Z = NaOH$

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Class 10 Questions

Class 10

Science Questions

Chapter

Acids, Bases and Salts

Subtopic

Salts and their Uses

$(a)$ Write the chemical name and chemical formula of washing soda.
$(b)$ How is it obtained from sodium chloride? Give equations of the reactions.
$(c)$ Why is it called a basic salt? Give any one of its uses.

Medium

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Which salt solution has a $pH$ greater than $7$?

Easy

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Salt $A$,commonly used in bakery products,on heating gets converted into another salt $B$,which itself is used for the removal of hardness of water,and a gas $C$ is evolved. The gas $C$,when passed through lime water,turns it milky. Identify $A$,$B$,and $C$.

Difficult

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How is bleaching powder prepared? Why does bleaching powder $(i)$ not dissolve completely in water?

Medium

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$(a)$ $A$ salt is produced by the reaction between an acid and a base. Identify the acid and the base from which the following salts have been formed:
$(i)$ $Na_{2}SO_{4}$
$(ii)$ $NH_{4}Cl$
$(iii)$ $KNO_{3}$
$(iv)$ $NaCl$

Medium

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Similar Questions

$(a)$ Write the chemical name and chemical formula of washing soda.$(b)$ How is it obtained from sodium chloride? Give equations of the reactions.$(c)$ Why is it called a basic salt? Give any one of its uses.

Which salt solution has a $pH$ greater than $7$?

Salt $A$,commonly used in bakery products,on heating gets converted into another salt $B$,which itself is used for the removal of hardness of water,and a gas $C$ is evolved. The gas $C$,when passed through lime water,turns it milky. Identify $A$,$B$,and $C$.

How is bleaching powder prepared? Why does bleaching powder $(i)$ not dissolve completely in water?

$(a)$ $A$ salt is produced by the reaction between an acid and a base. Identify the acid and the base from which the following salts have been formed:$(i)$ $Na_{2}SO_{4}$$(ii)$ $NH_{4}Cl$$(iii)$ $KNO_{3}$$(iv)$ $NaCl$

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$(a)$ Write the chemical name and chemical formula of washing soda.
$(b)$ How is it obtained from sodium chloride? Give equations of the reactions.
$(c)$ Why is it called a basic salt? Give any one of its uses.

$(a)$ $A$ salt is produced by the reaction between an acid and a base. Identify the acid and the base from which the following salts have been formed:
$(i)$ $Na_{2}SO_{4}$
$(ii)$ $NH_{4}Cl$
$(iii)$ $KNO_{3}$
$(iv)$ $NaCl$