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Standard XII

Chemistry

Limiting Reagent or Reactant

In a reaction...

Question

In a reaction $A_{2} + B \to A_{2} B$ If $200$ molecules of $A_{2}$ is reacted with $300$ atoms of $B$ to complete the reaction, then the correct statement is:

B

is limiting reactant

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200

atoms of

B

remain unreacted

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100

molecules of

A_{2}

remain unreacted

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200

molecules of

A_{2} B

is formed

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Solution

The correct option is A $B$ is limiting reactant
when $1$ mole of $A$ atom combines with $1 m o l$ of atom $B .$
$2.5 m o l$ of atom $A$ combines with 2.5mol of atom B,then $2.5 m o l$ of $A$ remain as it is hence $B$ is limiting reagent $B$ is less compared to $A .$

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Similar questions

In a reaction

A + B₂ → AB₂

Identify the limiting reagent, if any, in the following reaction mixtures.

(i) 300 atoms of A + 200 molecules of B

(ii) 2 mol A + 3 mol B

(iii) 100 atoms of A + 100 molecules of B

(iv) 5 mol A + 2.5 mol B

(v) 2.5 mol A + 5 mol B

In a reaction A+B₂ ----------> AB₂

Identify the limmiting reagent if any in the following reaction mixtures.

1) 300 atoms of A+ 200 molecules of B

2) 2mol A+ 100 mol B

3) 100 atoms of A+ 100 molecules of B

4) 5 Mol of A+ 2.5 mol B

5) 2.5 mol A + 5 mol of B

Q. Six molecules each of

A_{2}

(blue) and

B_{2}

(red), as shown in the figure above, are allowed to react until all of the limiting reactant has been consumed. The balanced equation for the reaction is:

2 A_{2} + B_{2} \to 2 A_{2} B

Which of the following correctly identifies the limiting reactant and predicts the number of

A_{2} B

molecules that will be produced?

Q. In a reaction

A + B_{2} \to {A B}_{2}

, identify the limiting reagent, if any, in the following reaction mixtures.
(i) 300 atoms of

A

+ 200 molecules of

B_{2}

(ii) 2 mol

A

+ 3 mol

B_{2}

(iii) 100 atoms of

A

+ 100 molecules of

B_{2}

(iv) 5 mol

A

+ 2.5 mol

B_{2}

(v) 2.5 mol

A

+ 5 mol

B_{2}

In a reaction

A + B_{2} \to {A B}_{2}

idetify the limiting reagent if any:

(a) 2 atoms of A reacts with 2 molecules of B.

(b) 2 moles of A reacts with 3 moles of B.

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In a reactionA2+B→A2BIf 200 molecules of A2 is reacted with 300 atoms of B to complete the reaction, then the correct statement is:

The correct option is A B is limiting reactantwhen 1 mole of A atom combines with 1mol of atom B.2.5mol of atom A combines with 2.5mol of atom B,then 2.5mol of A remain as it is hence B is limiting reagent B is less compared to A.

In a reaction $A_{2} + B \to A_{2} B$ If $200$ molecules of $A_{2}$ is reacted with $300$ atoms of $B$ to complete the reaction, then the correct statement is:

The correct option is A $B$ is limiting reactant
when $1$ mole of $A$ atom combines with $1 m o l$ of atom $B .$
$2.5 m o l$ of atom $A$ combines with 2.5mol of atom B,then $2.5 m o l$ of $A$ remain as it is hence $B$ is limiting reagent $B$ is less compared to $A .$