(A) The thermal decomposition of $KClO_3$ is given by: $2KClO_3 \rightarrow 2KCl + 3O_2$. From $2 \text{ moles}$ of $KClO_3$,we get $3 \text{ moles}$

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(A) The thermal decomposition of $KClO_3$ is given by: $2KClO_3 \rightarrow 2KCl + 3O_2$. From $2 \text{ moles}$ of $KClO_3$,we get $3 \text{ moles}$ of $O_2$. Therefore,$1 \text{ mole}$ of $KClO_3$ produces $1.5 \text{ moles}$ of $O_2$. The reaction of aluminum with oxygen is: $4Al + 3O_2 \rightarrow 2Al_2O_3$. From $3 \text{ moles}$ of $O_2$,we get $2 \text{ moles}$ of $Al_2O_3$. So,$1.5 \text{ moles}$ of $O_2$ will produce $(2/3) \times 1.5 = 1 \text{ mole}$ of $Al_2O_3$.

Class 11 Chemistry Some Basic Concepts of Chemistry Mix Examples of Some Basic Concept of Chemistry

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How many moles of aluminum oxide $(Al_2O_3)$ are produced when $1 \text{ mole}$ of potassium chlorate $(KClO_3)$ undergoes thermal decomposition,and the resulting gaseous product is reacted with excess aluminum?

A
$1$
B
$1.5$
C
$2$
D
$3$

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Some Basic Concepts of Chemistry

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Mix Examples of Some Basic Concept of Chemistry

The more commonly used baking powder contains about $30\%$ $NaHCO_3$,$20\%$ $NaAl(SO_4)_2$,$10\%$ $Ca(H_2PO_4)_2$ and $40\%$ starch. Which of the following statements is/are correct?

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The number of moles of solute present in the solutions of $I$,$II$ and $III$ is respectively:
$I$. $500 \ mL$ of $0.2 \ M \ NaOH$
$II$. $200 \ mL$ of $0.1 \ N \ H_2SO_4$
$III$. $6 \ g$ of urea in $1 \ kg$ of water

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The density of an equimolar mixture of $CH_4$ and $CO$ at $STP$ is ............... $g \, L^{-1}$.

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When metallic copper comes in contact with moisture,a green powdery/pasty coating can be seen over it. This is chemically known as

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What volume of $NH_3$ gas at $STP$ would be needed to prepare $100 \ mL$ of $2.5$ molal $(2.5 \ m)$ ammonium hydroxide solution? (Assume the density of the solution is $1 \ g/mL$)

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How many moles of aluminum oxide $(Al_2O_3)$ are produced when $1 \text{ mole}$ of potassium chlorate $(KClO_3)$ undergoes thermal decomposition,and the resulting gaseous product is reacted with excess aluminum?

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The more commonly used baking powder contains about $30\%$ $NaHCO_3$,$20\%$ $NaAl(SO_4)_2$,$10\%$ $Ca(H_2PO_4)_2$ and $40\%$ starch. Which of the following statements is/are correct?

The number of moles of solute present in the solutions of $I$,$II$ and $III$ is respectively:$I$. $500 \ mL$ of $0.2 \ M \ NaOH$$II$. $200 \ mL$ of $0.1 \ N \ H_2SO_4$$III$. $6 \ g$ of urea in $1 \ kg$ of water

The density of an equimolar mixture of $CH_4$ and $CO$ at $STP$ is ............... $g \, L^{-1}$.

When metallic copper comes in contact with moisture,a green powdery/pasty coating can be seen over it. This is chemically known as

What volume of $NH_3$ gas at $STP$ would be needed to prepare $100 \ mL$ of $2.5$ molal $(2.5 \ m)$ ammonium hydroxide solution? (Assume the density of the solution is $1 \ g/mL$)

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The number of moles of solute present in the solutions of $I$,$II$ and $III$ is respectively:
$I$. $500 \ mL$ of $0.2 \ M \ NaOH$
$II$. $200 \ mL$ of $0.1 \ N \ H_2SO_4$
$III$. $6 \ g$ of urea in $1 \ kg$ of water