question archive 1) What are the EDG and hybridization of the central atom in H2CO? The number in the formula is a subscript
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1) What are the EDG and hybridization of the central atom in H2CO? The number in the formula is a subscript. Optional Answers:
1. Trigonal planar; sp2
2. Tetrahedral; sp2
3. Tetrahedral; sp3
4. Trigonal planar; sp3
2. In this course, a double bond is comprised of:
Optional Answers:
1. two pi bonds.
2. two sigma bonds.
3. a sigma bond and a pi bond.
4. one pi bond.
3. In this course, what types of orbitals can form pi bonds? Optional Answers:
1. Only unhybridized p orbitals.
2. Only hybrid orbitals.
3. Hybrid and unhybridized orbitals of any type.
4. Only hybridized s orbitals.
4. Which of the following choices would have the LARGEST number of pi bonds?
Optional Answers:
1. A molecule with seven single bonds.
2. A molecule with three double bonds.
3. A molecule with two triple bonds.
5. A structure contains a carbon-carbon double bond with like groups on the same side of the double bond. This structure is referred to as a(n): Optional Answers: 1. formal charge. 2. resonance structure. 3. trans isomer. 4. cis isomer.
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9.4
1. What is the oxidation state of chlorine in ClF3?
Optional Answers:
1. -1
2. -3
3. +3
4. +1
2. Which of the following is NOT a reasonable oxidation state for phosphorus?
Optional Answers:
1. +5
2. -3
3. -5
4. +3
3. What are the formal charge (FC) and oxidation state (OS) of the nitrogen atom in ammonia? Optional Answers:
1. FC = -3, OS = 0
2. FC = -3, OS = -3
3. FC = 0, OS = 0
4. FC = 0, OS = -3
4. In the reaction 2Na + Cl2 -> 2NaCl, which species is the reducing agent?
Optional Answers:
1. Cl2
2. Na
5. For the reaction Mg + Zn2+ -> Zn + Mg2+, which of the following statements is FALSE?
Optional Answers:
1. Zn2+ undergoes reduction
2. Magnesium loses electrons
3. Magnesium is the oxidizing agent
4. Magnesium is a more active metal than zinc
6. From the reactions shown: copper displaces silver ions and iron displaces copper ions. Iron reacts with acid, but copper does not. Rank the species in order of INCREASING activity.
Optional Answers:
1. Fe < H2 < Cu < Ag
2. Fe < Cu < H2 < Ag
3. Ag < H2 < Cu < Fe
4. Ag < Cu < H2 < Fe
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9.5
1. In a 3.0 M solution of aluminum fluoride, what are the concentrations of the major species present?
Optional Answers:
1. 3.0 M Al3+ and 9.0 M F
2. 3.0 M Al3+ and 6.0 M F
3. 3.0 M AlF3
4. 3.0 M Al3+ and 3.0 M F
2. 100. mL of a 4.00 M sulfuric acid solution is diluted to 200. mL. What is the new concentration of the sulfuric acid solution?
Optional Answers:
1. 4.0 M
2. 2.0 M
3. 1.0 M 4. 8.0 M
3. An acidic solution will have a pH of:
Optional Answers: 1. > 7 2. = 7 3. < 7 4. Which of the following would be MOST suitable as an antacid? Optional Answers:
1. A strong base
2. A weak acid
3. A strong acid
4. A weak base