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 32 of 45
- A. Decrease to half
- B. Increase two-fold
- C. Option C
- D. Become fractional
Explanation: Explanation for this question will be added soon!
Correct answer: Decrease to half- A. 6.02 x 10^23
- B. 1.20 x 10^24
- C. 12.04 x 10^22
- D. 6.02 x 10^24
Explanation: Explanation for this question will be added soon!
Correct answer: 1.20 x 10^24- A. 3
- B. 3.5
- C. 2.0
- D. 0.5
Explanation: Explanation for this question will be added soon!
Correct answer: 2.0- A. 23 g
- B. 19.5 g
- C. 39 g
- D. 6.02 x 10^23 g
Explanation: Explanation for this question will be added soon!
Correct answer: 19.5 g- A. 0.25
- B. 0.125
- C. 0.50
- D. 1.50
Explanation: Explanation for this question will be added soon!
Correct answer: 0.125- A. 1.6 x 10^21
- B. 9.0 x 10^22
- C. 3.6 x 10^23
- D. 6.0 x 10^23
Explanation: Explanation for this question will be added soon!
Correct answer: 6.0 x 10^23- A. Water
- B. Benzene
- C. Sucrose
- D. Glucose
Explanation: Sucrose contains max (45 atoms I molecule
Correct answer: Sucrose- A. 2.24 dm3
- B. 22.4 dm3
- C. 1.12 dm3
- D. 112 dm3
Explanation: Explanation for this question will be added soon!
Correct answer: 1.12 dm3- A. 6.02 x 10^23
- B. 3.01 x 10^23
- C. 6.02 x 10^24
- D. 3.01 x 10^24
Explanation: Explanation for this question will be added soon!
Correct answer: 6.02 x 10^23- A. 200
- B. 155
- C. 400
- D. 355
Explanation: et us assume the compound contains one atom of sulphur S: Compound 8:100 1: 100/8 32:100/8 x32 -> 400 (One atom of 5 weighs 32)
Correct answer: 400- A. 1.3x10 -20g
- B. 3.72 x 10^23g
- C. 5.01 x 10^-2Ig
- D. 1.4 x 10^-2Ig
Explanation: Explanation for this question will be added soon!
Correct answer: 1.4 x 10^-2Ig- A. 15 dm3 of H2 gas at STP
- B. 5 dm3 of N2gas at STP
- C. 1.5 g of H2gas
- D. 5 g of O2gas
Explanation: Explanation for this question will be added soon!
Correct answer: 1.5 g of H2gas- A. 3.01 x 10^24
- B. 30.1.1024
- C. 4.06 x 10^24
- D. 3.01 x 10^23
Explanation: Explanation for this question will be added soon!
Correct answer: 3.01 x 10^24- A. One mole of hydrogen weighs less than one mole of glucose
- B. Two moles of hydrogen and one mole of helium weigh the same
- C. 0.1 mole of oxygen weighs more than one mole of hydrogen
- D. One mole of nitrogen and half a mole of oxygen weigh the same
Explanation: Explanation for this question will be added soon!
Correct answer: One mole of nitrogen and half a mole of oxygen weigh the same- A. 0.2
- B. 0.4
- C. 0.5
- D. 0.9
Explanation: Explanation for this question will be added soon!
Correct answer: 0.5- A. M2O
- B. M2O3
- C. MO
- D. M3M4
Explanation: O = 40%no = 40/16no = 2.5 M=60%nM = 60/24nM = 2.5 M : O2.5/2.52.5/2.5MO = Empirical formula
Correct answer: MO- A. 12 g
- B. 4.4 g
- C. 44 g
- D. 440 g
Explanation: Explanation for this question will be added soon!
Correct answer: 44 g- A. CO and H2O
- B. CO2 and H2O2
- C. CO2 and H2O
- D. All of them
Explanation: Explanation for this question will be added soon!
Correct answer: CO2 and H2O- A. CH
- B. C6H6
- C. CHO
- D. CH2O
Explanation: Explanation for this question will be added soon!
Correct answer: CH2O640. Atomic mass, molecular mass, formula mass or ionic mass of substance expressed in gram is called
- A. Avogadro's no.
- B. Molar mass
- C. Molar volume
- D. Mole
Explanation: Explanation for this question will be added soon!
Correct answer: Molar mass