Chemistry

Test Bank for Chemistry: The Molecular Nature of Matter, 8th Edition 8e by Neil D. Jespersen, Alison Hyslop. Full Chapters test bank are included with answers - Chapter 1 to 22 included 0 A Very Brief History of Chemistry 1 0.1 Chemistry’s Important Concepts 2 0.2 Supernovas and the Elements 3 0.3 Elements and the Earth 5 0.4 Dalton’s Atomic Theory 7 0.5 Internal Structure of the Atom 8 Tools for Problem Solving 20 Review Questions and Problems 21 1 Scientific Meas...

2 OCR 2023 1 Ozone, O3 , is a serious pollutant when present in the troposphere. (a) Give one polluting effect of ozone in the troposphere. ................................................................................................................................................... .............................................................................................................................................. [1] (b) Tropospheric ozone is produced by the reactions of nit...

The element bromine is extracted from seawater. Bromide ions are present in seawater in very low concentrations compared with chloride ions. (a) (i) Excess chlorine is added to acidified seawater, forming aqueous bromine. Write an ionic equation for the reaction of chlorine with bromide ions and explain how it shows that chlorine is more reactive than bromine. Equation: Explanation: ..............................................................................................................

2 OCR 2023 Section A You should spend a maximum of 40 minutes on this section. Write your answer to each question in the box provided. 1 Which row is correct for the properties of substances with the bonding types shown? Bonding type Melting point Electrical conductivity Solid Molten A covalent network low poor poor B ionic high good good C metallic high poor good D simple molecular low poor poor Your answer [1] 2 Helium-4 is formed by a nuclear fusion reaction. 2 3He 4He + .....

1 This question is about Group 2 compounds. Group 2 hydroxides can be used to neutralise acidity in a variety of contexts. Magnesium hydroxide may be used to neutralise excess stomach acidity and calcium hydroxide may be used to neutralise acidity in soils. The hydroxides are formed when the oxides react with water. (a) Write an equation to show the ions formed when calcium oxide reacts with water. [1] (b) A student shakes a small amount of magnesium oxide in a test tube with water. A whi...

2 OCR 2023 Section A You should spend a maximum of 25 minutes on this section. Write your answer to each question in the box provided. 1 What is the outer electron configuration of tellurium, Te? A 4p6 B 4s2 4p4 C 5p6 D 5s2 5p4 Your answer [1] 2 Which of the following exists as cis/trans isomers? A (CH3 ) 2CCHCH3 B CH3CHCHCH3 C CH3CH2CH2CH3 D CH2C(CH3 ) 2 Your answer [1] 3 Which of these properties of chlorine is a benefit to humankind? A It is a bleach. B It is a gas. C ...

2 OCR 2023 1 This question is about the first 36 elements in the periodic table: H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr From these 36 elements only, write the symbol for the element(s) that fit each description. (a) The three elements that, when in a molecule, can form hydrogen bonds with other suitable molecules. .......................................................... [1] (b) The element in Period 2 with the successive io...

2 OCR 2023 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 Which compound is used for proton exchange in NMR spectroscopy? A CCl 4 B CDCl 3 C D2O D Si(CH3 ) 4 Your answer [1] 2 Which compound reacts with 2,4-dinitrophenylhydrazine but does not react with Tollens’ reagent? A C6H5COCOOH B C6H5CH(OH)CHO C CH3COCHO D CH3CH2CH(OH)CH3 Your answer [1] 3 Propyne, CH3C≡CH, is a member of the alkynes ...

2 OCR 2023 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 Which sample contains the greatest number of molecules? A 35.0 g of C2H2 B 45.0 g of C2H6 C 60.0 g of C4H10 D 100.0g of C6H6 Your answer [1] 2 0.688g of an oxide of manganese is reduced by hydrogen gas to form manganese metal and 0.235g of water. What is the formula of the oxide of manganese? A MnO B MnO2 C Mn2O3 D Mn3O4 Your answer [1] 3 How...