Question

Q.71
For the reaction
2A + 3B + 5C → 3D
Initially if 2 mole of A, 4 mole of B and 6
mole of C is taken, With 25% yield, moles
D which can be produced are
(1) 0.75
(3) 0.25
(2) 0.5
(4) 0.6​

Answer 1

Answer: The correct answer is Option 1.

Explanation:

We are given:

Moles of A = 2 mole

Moles of B = 4 mole

Moles of C = 6 mole

For given a chemical equation:

$2A+3B+5C\rightarrow 3D$

By Stoichiometry of the reaction:

2 moles of A reacts with 3 moles of B and 5 moles of B.

So, 2 moles of A reacts with $\frac{3}{2}\times 2=3mol$ of B and $\frac{5}{2}\times 2=5mol$ of C.

As, the given amount of B and C is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.

Therefore, A is considered as limiting reagent because it limits the formation of products.

By Stoichiometry of the reaction:

2 mole of A is producing 3 moles of D.

So, 2 moles of A will produce $\frac{3}{2}\times 2=3mol$ of D.

To calculate the experimental yield of D, we use the equation:

$\%\text{ yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

% yield of reaction = 25 %

Theoretical yield of D = 3 moles

Putting values in above equation, we get:

$25=\frac{\text{Experimental yield of D}}{3moles}\times 100\\\\\text{Experimental yield of D}=0.75mol$

Hence, the correct answer is Option 1.

Answer 2

Answer:

Answer: The correct answer is Option 1.

Explanation:

We are given:

Moles of A = 2 mole

Moles of B = 4 mole

Moles of C = 6 mole

For given a chemical equation:

By Stoichiometry of the reaction:

2 moles of A reacts with 3 moles of B and 5 moles of B.

So, 2 moles of A reacts with  of B and  of C.

As, the given amount of B and C is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.

Therefore, A is considered as limiting reagent because it limits the formation of products.

By Stoichiometry of the reaction:

2 mole of A is producing 3 moles of D.

So, 2 moles of A will produce  of D.

To calculate the experimental yield of D, we use the equation:

% yield of reaction = 25 %

Theoretical yield of D = 3 moles

Putting values in above equation, we get:

Hence, the correct answer is Option 1.