OCR A level Chemistry

OCR A LEVEL CHEMISTRY DEFINITIONS EXAM [ALREADY GRADED A+] WITH CORRECT DETAILED Amphoteric chemicals - ANSWER-Chemicals that can react with both acids and bases Anion - ANSWER-A negatively charged ion Anhydrous - ANSWER-A substance that contains no water molecules Arrhenius plot - ANSWER-A graph of lnK = lnA - Ea/R x 1/T Atomic Orbital - ANSWER-A region of space where you will likely find electrons. Each orbital can hold 2 electrons, with opposite spins ...

OCR A LEVEL CHEMISTRY EXAM QUESTIONS AND CORRECT DETAILED ANSWERS LATEST VERSION UPDATE (2024) ALREADY GRADED A+

Define Transition element - CORRECT ANSWERS-A d-block element that can form at least one stable ion with an incomplete d sub-shell Why aren't scandium and Zinc transition elements? - CORRECT ANSWERS-Cannot form stable ions with an incomplete d-sub shell. Sc 3+ has an empty d-sub shell and Zn 2+ has a full d sub shell. Name the oxidation states and coloured ions for Manganese - CORRECT ANSWERS-MnO4 - (purple) MnO4 2- (green) Mn 2+ (pale pink) Name the oxidation state and coloured ions...

Define Transition element Correct Answer A d-block element that can form at least one stable ion with an incomplete d sub-shell Why aren't scandium and Zinc transition elements? Correct Answer Cannot form stable ions with an incomplete d-sub shell. Sc 3+ has an empty d-sub shell and Zn 2+ has a full d sub shell. Name the oxidation states and coloured ions for Manganese Correct Answer MnO4 - (purple) MnO4 2- (green) Mn 2+ (pale pink) Name the oxidation state and coloured ions for Tita...

QUESTIONS AND ANSWERS

OCR A LEVEL CHEMISTRY – HALOGENS EXAM 2024 WITH BEST SOLUTIONS Describe fluorine - ANSWER-A poisonous yellow gas Describe chlorine - ANSWER-A poisonous, dense and yellow-green gas Describe bromine - ANSWER-A caustic (corrosive) toxic red-brown volatile liquid Describe iodine - ANSWER-A shiny, grey black solid What does iodine sublime to form? - ANSWER-A violet vapour (on gentle heating) What are the properties of astatine likely to be? - ANSWER-Dark colour ...

Aliphatic hydrocarbon correct answers A hydrocarbon with carbon atoms joined together in straight or branched chains. Alicylic hydrocarbon correct answers A hydrocarbon with carbon atoms joined together in a ring structure. Aromatic hydrocarbon correct answers Contain at least one benzene ring or similar structural features. Aldehyde correct answers Carboxylic acid correct answers Ketone correct answers Aldehyde suffix correct answers -al Carboxylic acid suffix correct an...

HYDROCARBONS correct answers ORGANIC COMPOUNDS THAT CONTAIN CARBON & HYDROGEN ONLY UNSATURATED HYDROCARBON correct answers A HYDROCARBON CONTAINING CARBON-TO-CARBON MULTIPLE BONDS HOMOLOGOUS SERIES correct answers A SERIES OF ORGANIC COMPOUNDS WITH THE SAME FUNCTIONAL GROUP BUT WITH EACH SUCCESSIVE MEMBER DIFFERING BY CH2 ALKANES correct answers THE HOMOLOGOUS SERIES WITH THE GENERAL FORMULA Cn H2n+2 STRUCTURAL ISOMERS correct answers MOLECULES WITH THE SAME MOLECULAR FORMULA BUT WIT...

Electronegativity correct answers The tendancy of an atom to attract the bonding pair of electrons in a covalent bond Radical correct answers A molecule, atom or ion with an unpaired electron Acid (bronsted lowry theory) correct answers A molecule or atom that can donate a proton Base correct answers A molecule or atom which can act as a proton acceptor Alkali correct answers A water soluble base Standard Conditions correct answers 298 K, 100 kPa, 1 moldm^-3 Standard enthalpy c...