Free Fundamental Concepts of Chemistry MCQs with Answers
894 Fundamental Concepts of Chemistry MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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Read the Fundamental Concepts of Chemistry notesFree MDCAT chapter notes with key terms894 questions · page 31 of 45
601. Choose the correct option regarding number of particles associated with one mole of a substance:
- A. 6.03 x 10^23
- B. 6.01 x 10^-19
- C. 6.02 x 10^-23
- D. 6.02 x 10^23
Explanation: One mole of a substance always contains 6.02 x 1023 particles, this is Avogadro's number.
Correct answer: 6.02 x 10^23- A. 120ml
- B. 20ml
- C. 40ml
- D. 60ml
Explanation: Following is the solution to this question:
Correct answer: 60ml- A. 100
- B. 106
- C. 103
- D. 104
Explanation: Following is the solution to this question:
Correct answer: 104- A. 16/N
- B. 32/N
- C. 16 N
- D. 32 N
Explanation: Following is the solution to this question:
Correct answer: 16/N- A. 10
- B. 20
- C. 15
- D. 25
Explanation: Following is the solution to this question:
Correct answer: 20- A. 4 x 6.022 x 10^23
- B. 1 x 6.022 x 10^23
- C. 2 x 6.022 x 10^23
- D. 2 x 6.022 x 10^22
Explanation: H2SO4 :2H+ 0.1 2 x 0.1 H+ =n x NA 0.2 x 6.022 x 1023 2 x 6.022 x 1022
Correct answer: 1 x 6.022 x 10^23607. When 0.5 moles of Al2(SO4)3 are dissolved in water, the total number of particles produced are?
- A. 1.2 x 10^23
- B. 3.0 x 10^23
- C. 1.5 x 10^24
- D. 2.5 x 10^23
Explanation: 1 Al2(SO4)3 produces 5 particles 0.5 Al2(SO4)3 produces 2.5 particles 2.5 x 6.02 x 1023= 1.5 x 1024
Correct answer: 1.5 x 10^24- A. lg of Ni (s)
- B. 1g of Ca (s)
- C. Ig of N2
- D. lg of B
Explanation: Explanation for this question will be added soon!
Correct answer: lg of B- A. 0.0025 mole
- B. 0.25mole
- C. 0.025 mole
- D. 2.5 mole
Explanation: Explanation for this question will be added soon!
Correct answer: 2.5 mole- A. 6.023 x 10^23
- B. 3.011 x 10^23
- C. 6.023 x 10^21
- D. 6.023 x 10^22
Explanation: Explanation for this question will be added soon!
Correct answer: 3.011 x 10^23- A. 3 Mole
- B. 0.27 Mole
- C. 0.75 Mole
- D. 1.5 mole
Explanation: 2Al+ 3O2- 4 A12O3 Al: Oxyge 54g: 96g I g: 96/54g 27g: 96/54x 27 48g or 1.5 mole
Correct answer: 1.5 mole- A. 35.5g
- B. 71 g
- C. 142 g
- D. 71.5 g
Explanation: H2 + Cl2-+2HCl H2: Cl2 2g: 71g 1g: 71/2 4g:71/2x 4 142.g.
Correct answer: 142 g- A. 10 moles
- B. 6 moles
- C. 8 moles
- D. 4 moles
Explanation: 2H2 + O2 2H2O H2: O2 10/2 : 6/1 Limiting reactant 5 : 6 2:2 1:1 10:10 mole.
Correct answer: 10 moles- A. 1.15 x 10^23
- B. 1.34 x 10^22
- C. 3.01 x 10^23
- D. 3.01 x 10^22
Explanation: Explanation for this question will be added soon!
Correct answer: 1.15 x 10^23- A. 64 dm3
- B. 24 dm3
- C. 22.4 dm3
- D. 2.24 dm3
Explanation: Explanation for this question will be added soon!
Correct answer: 22.4 dm3- A. 21 grams
- B. 19 grams
- C. 18 grams
- D. 15 grams
Explanation: Explanation for this question will be added soon!
Correct answer: 18 grams- A. 12%
- B. 10%
- C. 48%
- D. 40%
Explanation: Explanation for this question will be added soon!
Correct answer: 40%- A. 0.9 mole
- B. 36 moles
- C. 1.8 moles
- D. 3.6 moles
Explanation: Explanation for this question will be added soon!
Correct answer: 0.9 mole- A. Which is present in maximum amount
- B. Which produces minimum No. of moles of product
- C. Which produces maximum No. of moles of product
- D. Does not affect the amount of product
Explanation: Explanation for this question will be added soon!
Correct answer: Which produces minimum No. of moles of product- A. 1.0
- B. 0.5
- C. 0.25
- D. 0.1
Explanation: Explanation for this question will be added soon!
Correct answer: 1.0