This bundle is comprised of 10 Revision papers for both Chemistry A and B with complete marking schemes well explained for exam preparations and to fit the current examination settings.
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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 (Lond...
Voorbeeld 4 van de 50 pagina's
In winkelwagen2 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 (Lond...
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....
Voorbeeld 4 van de 47 pagina's
In winkelwagen2 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....
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...
Voorbeeld 4 van de 64 pagina's
In winkelwagen2 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...
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,...
Voorbeeld 4 van de 67 pagina's
In winkelwagen2 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,...
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 element...
Voorbeeld 4 van de 58 pagina's
In winkelwagen2 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 element...
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 ...
Voorbeeld 4 van de 42 pagina's
In winkelwagen2 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 ...
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 oxi...
Voorbeeld 4 van de 39 pagina's
In winkelwagen1 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 oxi...
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 cov...
Voorbeeld 4 van de 68 pagina's
In winkelwagen2 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 cov...
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 ...
Voorbeeld 4 van de 47 pagina's
In winkelwagenThe 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 ...
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. ................................................................................................................................................... .........
Voorbeeld 4 van de 45 pagina's
In winkelwagen2 OCR 2023 1 Ozone, O3 , is a serious pollutant when present in the troposphere. (a) Give one polluting effect of ozone in the troposphere. ................................................................................................................................................... .........
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