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MDCAT ENGLISH MCQs
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etea Chemistry
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Author: ETEA MCQS.COM

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The theoretical yield of carbon dioxide gas (in dm³ at STP) from burning 24 g of carbon is (C + O₂ → CO₂; C=12 g/mol):

11.2 dm³
22.4 dm³
44.8 dm³
33.6 dm³

ETEA MCQS.COM
Yield

From the reaction 4Fe + 3O₂ → 2Fe₂O₃, the theoretical yield of iron(III) oxide from 4 moles of Fe is:

1 mole
2 moles
3 moles
4 moles

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Yield

What is the theoretical yield of hydrogen gas (in grams) when 4 moles of Na react with excess water? (2Na + 2H₂O → 2NaOH + H₂; H₂=2 g/mol)

2 g
4 g
6 g
8 g

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Yield

When 6.5 g of Zn (0.1 mol) reacts with 7.3 g of HCl (0.2 mol), the theoretical yield of ZnCl₂ is (Zn + 2HCl → ZnCl₂; ZnCl₂=136 g/mol):

13.6 g
6.5 g
7.3 g
27.2 g

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Yield

The theoretical yield is always based on the amount of the ______ reactant.

initial
final
limiting
excess

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Yield

For C₃H₈ + 5O₂ → 3CO₂ + 4H₂O, the theoretical yield of CO₂ from 0.5 moles of C₃H₈ is:

1.5 moles
3 moles
0.5 moles
5 moles

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Yield

The theoretical yield of silver (Ag) from the decomposition of 17 g of AgNO₃ is (2AgNO₃ → 2Ag + 2NO₂ + O₂; Ag=108, AgNO₃=170):

1.08 g
10.8 g
21.6 g
17 g

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Yield

Given 2Al + 3Br₂ → 2AlBr₃, the theoretical yield of AlBr₃ from 3 moles of Br₂ is:

1 mole
2 moles
3 moles
4 moles

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Yield

The reaction of 10 g of H₂ (5 mol) with 32 g of O₂ (1 mol) produces H₂O. The theoretical yield of water is (2H₂ + O₂ → 2H₂O):

18 g
36 g
90 g
10 g

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Yield

The complete combustion of 32 g of methane (CH₄=16 g/mol) produces a theoretical yield of ___ grams of CO₂ (CO₂=44 g/mol).

32 g
44 g
88 g
16 g

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Yield

For the reaction 2KClO₃ → 2KCl + 3O₂, the theoretical yield of O₂ from 1 mole of KClO₃ is:

1 mole
1.5 moles
2 moles
3 moles

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Yield

Given 2Na + Cl₂ → 2NaCl, the theoretical yield of NaCl from 46 g of Na is (Na=23 g/mol; NaCl=58.5 g/mol):

58.5 g
117 g
46 g
23 g

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Yield

The theoretical yield of H₂ gas at STP from the reaction of 1 mole of Zn with excess HCl (Zn + 2HCl → ZnCl₂ + H₂) is:

11.2 dm³
22.4 dm³
2 dm³
1 dm³

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Yield

The reaction of 1 mole of CH₄ with excess O₂ (CH₄ + 2O₂ → CO₂ + 2H₂O) produces a theoretical yield of ___ grams of H₂O. (H₂O=18 g/mol)

18 g
36 g
9 g
2 g

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Yield

For CaCO₃ → CaO + CO₂, the theoretical yield of CaO from 50 g of CaCO₃ is (CaCO₃=100 g/mol; CaO=56 g/mol):

56 g
50 g
28 g
100 g

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Yield

The theoretical yield of MgO from the reaction of 24 g of Mg (Mg=24 g/mol) is (2Mg + O₂ → 2MgO; MgO=40 g/mol):

24 g
32 g
40 g
80 g

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Yield

Given N₂ + 3H₂ → 2NH₃, the theoretical yield of NH₃ from 3 moles of H₂ is:

1 mole
2 moles
3 moles
4 moles

ETEA MCQS.COM
Yield

For the reaction C + O₂ → CO₂, the theoretical yield of CO₂ from 12 g of Carbon (C=12 g/mol) is:

12 g
22 g
32 g
44 g

ETEA MCQS.COM
Yield

In the reaction 2H₂ + O₂ → 2H₂O, the theoretical yield of water from 2 moles of H₂ is:

1 mole
2 moles
4 moles
0.5 moles

ETEA MCQS.COM
Yield

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