chemistry
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Latest notes & summaries chemistry
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...
2 
OCR 2023 
1 This question is about titanium (atomic number 22) and its compounds. 
(a) Titanium exists as a mixture of five isotopes. 
A chemist analyses a sample of titanium using mass spectrometry. 
The results are shown in the table below. 
Isotope Abundance (%) 
46Ti 8.30 
47Ti 7.40 
48Ti 73.70 
49Ti 5.40 
50Ti 5.20 
(i) Calculate the relative atomic mass of titanium in the sample. 
Give your answer to 2 decimal places. 
relative atomic mass = ................................................
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 Which statement explains the trend in boiling points down the halogens group? 
A Covalent bonds become stronger. 
B Induced dipole–dipole interactions (London forces) become stronger. 
C Ionic bonds become stronger. 
D Permanent dipole–dipole interactions become stronger. 
Your answer [1] 
2 A hydrocarbon contains 85.71% carbon by mass. 
What is the em...
Test Bank for Chemistry: Structure and Properties 3e 3rd Edition by Nivaldo J. Tro. Full Chapters test bank are included with answers - Chapter 1 to 22 
 
Atoms 
The Quantum-Mechanical Model of the Atom 
Periodic Properties of the Elements 
Molecules and Compounds 
Chemical Bonding I: Drawing Lewis Structures and Determining Molecular Shapes 
Chemical Bonding II: Valence Bond Theory and Molecular Orbital Theory 
Chemical Reactions and Chemical Quantities 
Introduction to Solutions and Aqueous Re...
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