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Question 1: Which of the following statements are correct? 1. Your favourite bubbly soft drink is an example of a heterogenous mixture. II. A compound consists of only one type of element, for example Fe. The air we breathe is a mixture because it contains of a few compounds. I. IV. Sulphur dioxide is an example of an element. 1. I and II 2. Il and IV 3. I and III 4. Il only

Question 1: Which of the following statements are correct? 1. Your favourite bubbly soft drink is an example of a heterogenous mixture. II. A compound consists of only one type of element, for example Fe. The air we breathe is a mixture because it contains of a few compounds. I. IV. Sulphur dioxide is an example of an element. 1. I and II 2. Il and IV 3. I and III 4. Il only

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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CONFIDENTIAL CHE1504 Page 2 of 11 October/November 2020 PART A Question 1: Which of the following statements are correct? Your favourite bubbly soft drink is an example of a heterogenous mixture. A compound consists of only one type of element, for example Fe. The air we breathe is a mixture because it contains of a few compounds. I. I. II. IV. Sulphur dioxide is an example of an element. 1. I and II 2. Il and IV 3. I and III 4. Il only Question 2: Which of the following do not have a covalent bond in the molecule? 1. CC4 2. SH2 3. NH3 4. LICOS Question 3: Which of the following represents isotopes? 1. The atomic number differs but the mass number is the same. 2. The atomic number and the electrons must be the same. 3. The compound has different proton numbers but the same neutrons. 4. One element has a mass number of 12 and the other 13. Question 4: Convert 0.92 x 10° m to nL: 1. 9.2 x 10 L 2. 920 x 10" nL 3. 9.2 x 1014 nL. 4. 92 x 1010 nL CONFIDENTIAL CHE1504 Page 3 of 11 October/November 2020 Question 5: Which of the following statements are correct? I. All metals conduct electricity. Non-metals are not used as conductors because they do not conduct well. Aluminium is considered a metalloid. I. I. IV All elements will form cations. 1. All options are correct 2. Il and III 3. I, Il and III 4. I and II Question 6: Which of the following statements about atomic mass is true? 1. Atomic mass is the same as the molecular weight. 2. Atomic mass is the number of protons in the atom. 3. Atomic mass is the number of neutrons and the number of electrons. 4. Atomic mass is the number of protons and the number of electrons. Question 7: Which of the following statements regarding quantum numbers and shells are correct? 1. The primary quantum number, n, can have numbers such as -1. 2. An=3 can have the following subshells: s, p and d. 3. the subprinciple quantum number of He will be 1. 4. The spin quantum number can have numbers like 1.5.
Transcribed Image Text:CONFIDENTIAL CHE1504 Page 2 of 11 October/November 2020 PART A Question 1: Which of the following statements are correct? Your favourite bubbly soft drink is an example of a heterogenous mixture. A compound consists of only one type of element, for example Fe. The air we breathe is a mixture because it contains of a few compounds. I. I. II. IV. Sulphur dioxide is an example of an element. 1. I and II 2. Il and IV 3. I and III 4. Il only Question 2: Which of the following do not have a covalent bond in the molecule? 1. CC4 2. SH2 3. NH3 4. LICOS Question 3: Which of the following represents isotopes? 1. The atomic number differs but the mass number is the same. 2. The atomic number and the electrons must be the same. 3. The compound has different proton numbers but the same neutrons. 4. One element has a mass number of 12 and the other 13. Question 4: Convert 0.92 x 10° m to nL: 1. 9.2 x 10 L 2. 920 x 10" nL 3. 9.2 x 1014 nL. 4. 92 x 1010 nL CONFIDENTIAL CHE1504 Page 3 of 11 October/November 2020 Question 5: Which of the following statements are correct? I. All metals conduct electricity. Non-metals are not used as conductors because they do not conduct well. Aluminium is considered a metalloid. I. I. IV All elements will form cations. 1. All options are correct 2. Il and III 3. I, Il and III 4. I and II Question 6: Which of the following statements about atomic mass is true? 1. Atomic mass is the same as the molecular weight. 2. Atomic mass is the number of protons in the atom. 3. Atomic mass is the number of neutrons and the number of electrons. 4. Atomic mass is the number of protons and the number of electrons. Question 7: Which of the following statements regarding quantum numbers and shells are correct? 1. The primary quantum number, n, can have numbers such as -1. 2. An=3 can have the following subshells: s, p and d. 3. the subprinciple quantum number of He will be 1. 4. The spin quantum number can have numbers like 1.5.
CONFIDENTIAL CHE1504 Рage 3 of 11 October/November 2020 Question 5: Which of the following statements are correct? 1. All metals conduct electricity. Non-metals are not used as conductors because they do not conduct well. I. II. Aluminium is considered a metalloid. IV. All elements will form cations. 1. All options are correct 2. Il and II 3. I, Il and II 4. I and II Question 6: Which of the following statements about atomic mass is true? 1. Atomic mass is the same as the molecular weight. 2. Atomic mass is the number of protons in the atom. 3. Atomic mass is the number of neutrons and the number of electrons. 4. Atomic mass is the number of protons and the number of electrons. Question 7: Which of the following statements regarding quantum numbers and shells are correct? 1. The primary quantum number, n, can have numbers such as -1. 2. An= 3 can have the following subshells: s, p and d. 3. the subprinciple quantum number of He will be 1. 4. The spin quantum number can have numbers like 1.5. Question 8: Which of the following would you not find on the periodic table? 1. Noble gasses 2. Compounds 3. Halides 4. Alkali earth metals CONFIDENTIAL CHE1504 Page 4 of 11 October/November 2020 Question 9: Which of the following is not correct? 1. The name of AszOs is arsenic trioxide. The name of O is an oxygen ion. The name of Fez(SO.)s is Iron (III) sulfate. The name of P:Os is phosphorus trioxide. II. II. IV. 1. I and IV 2. Il and II 3. Il and IV 4. T and II Question 10: Which of the following is not correct? 1. Oxygen has a higher electron affinity than sulphur. 2. Electronegativity is the ability of an atom to attract an electron to itself through the formation of only covalent bonds. 3. Iron has a higher ionisation energy than nickel. 4. Atomic size is a measure of the electron that is furthest from the nucleus. Total 20 marks End of Part A
Transcribed Image Text:CONFIDENTIAL CHE1504 Рage 3 of 11 October/November 2020 Question 5: Which of the following statements are correct? 1. All metals conduct electricity. Non-metals are not used as conductors because they do not conduct well. I. II. Aluminium is considered a metalloid. IV. All elements will form cations. 1. All options are correct 2. Il and II 3. I, Il and II 4. I and II Question 6: Which of the following statements about atomic mass is true? 1. Atomic mass is the same as the molecular weight. 2. Atomic mass is the number of protons in the atom. 3. Atomic mass is the number of neutrons and the number of electrons. 4. Atomic mass is the number of protons and the number of electrons. Question 7: Which of the following statements regarding quantum numbers and shells are correct? 1. The primary quantum number, n, can have numbers such as -1. 2. An= 3 can have the following subshells: s, p and d. 3. the subprinciple quantum number of He will be 1. 4. The spin quantum number can have numbers like 1.5. Question 8: Which of the following would you not find on the periodic table? 1. Noble gasses 2. Compounds 3. Halides 4. Alkali earth metals CONFIDENTIAL CHE1504 Page 4 of 11 October/November 2020 Question 9: Which of the following is not correct? 1. The name of AszOs is arsenic trioxide. The name of O is an oxygen ion. The name of Fez(SO.)s is Iron (III) sulfate. The name of P:Os is phosphorus trioxide. II. II. IV. 1. I and IV 2. Il and II 3. Il and IV 4. T and II Question 10: Which of the following is not correct? 1. Oxygen has a higher electron affinity than sulphur. 2. Electronegativity is the ability of an atom to attract an electron to itself through the formation of only covalent bonds. 3. Iron has a higher ionisation energy than nickel. 4. Atomic size is a measure of the electron that is furthest from the nucleus. Total 20 marks End of Part A
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