MHT-CET Redox Reactions — practice questions
71 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice MHT-CET Redox Reactions in the app →In a redox reaction, oxidation refers to which change?When an atom is reduced, what happens to its oxidation state?In which year did the term redox first appear in print?The oxidation alone and the reduction alone are each called a what?A reducing agent in a redox reaction does what?An oxidizing agent removes electrons from another substance. What happens to the agent itself?The pair Fe2+/Fe3+ is an example of what?Originally, the word oxidation meant which process?The word reduction originally referred to which observation?Which elemental metal is a good reducing agent?NaBH4 and LiAlH4 reduce carbonyl compounds by transferring what?Which standard reduction potential is listed for F2, a very strong oxidizing agent?An oxidizing agent weaker than H+ has what sign of standard reduction potential?How is the standard cell potential obtained from half-cell values?In H2 + F2 giving 2 HF, which species is reduced?What happens to iron atoms when iron rusts?Common rust is usually which compound?What defines a disproportionation reaction?Thiosulfate in acid forms S and SO2. Sulfur goes from +2 to which two states?Cl2 reacts with concentrated NaOH. What is chlorine's oxidation number in chlorate?Which French-derived word is another name for disproportionation?Who studied 2 Sn2+ giving Sn4+ and Sn using tartrates in 1788?Which enzyme catalyses the disproportionation of hydrogen peroxide to water and oxygen?Which enzyme converts superoxide into hydrogen peroxide and oxygen in living systems?The Cannizzaro reaction converts an aldehyde into which pair of products?An atom's oxidation state is its hypothetical charge if every bond were treated as what?In a neutral molecule, the oxidation numbers of all atoms add up to what?What oxidation number does chlorine have in KCl?Which element shows the highest known oxidation state, +9, in IrO4+?In Stock nomenclature, how is the oxidation state written?Who first used the term oxidation for the reaction of a substance with oxygen?What oxidation state does hydrogen take when bonded as a hydride to a metal?In which kind of compound is oxygen not assigned -2?What oxidation state does magnesium have in its compounds?What is the average oxidation state of iron in magnetite, Fe3O4?What is the oxidation state of each oxygen atom in potassium superoxide, KO2?What average oxidation state is assigned to carbon in propane, C3H8?How many integer oxidation states does carbon have between -4 and +4?Acetaldehyde becomes acetic acid with Tollens' reagent. How does the carbonyl carbon change?In 2 As3+ + 3 Sn2+ giving 2 As + 3 Sn4+, how many electrons are transferred?Bond electrons between unlike atoms go to the atom with?How are bond electrons shared between two atoms of the same element when assigning oxidation states?Does an oxidation state represent an atom's actual charge?Formal charge is the opposite idea to oxidation state because it treats bonds as what?In cathodic protection, the protected metal is made which part of a cell?The Ostwald process makes nitric acid by the catalytic oxidation of what?Which reducing agent is combined with iron oxides in a blast furnace?In Fe2O3 + 3 CO giving 2 Fe + 3 CO2, what role does CO play?In aerobic cellular respiration, oxygen is reduced to form what?In photosynthesis, water is oxidized into which product?Which compound is the product when NAD+ is reduced in respiration?What does the mnemonic OIL RIG state?According to the AN OX and RED CAT mnemonics, oxidation occurs at which electrode?In a galvanic cell such as a fuel cell, which electrode is negative?Who won the 1983 Nobel Prize in Chemistry for distinguishing inner-sphere and outer-sphere electron transfer?In inner-sphere electron transfer, the two reactants share what?Hydrogenation of a C=C bond is classified as which type of change?Which of these is named as a strong oxidizer?Heating phosphorous acid to 200 degrees C gives phosphoric acid and which other product?UV light makes mercury(I) chloride disproportionate into HgCl2 and what else?What is red lead, Pb3O4, called in systematic nomenclature?Writing Au(III)Cl3 for AuCl3 is called which notation?In the ion electron method, H atoms are balanced by adding what?In a half equation, O atoms are balanced by adding H2O to which side?Which statement defines oxidation in terms of oxidation number?In balanced CuO + NH3 giving Cu + N2 + H2O, what is the coefficient of H2O?In MnO4- reacting with Fe2+ to give Mn2+ and Fe3+, how many Fe2+ ions per MnO4- ?When H3AsO3 reacts with BrO3- to give Br-, what happens to arsenic?In H3AsO3 reacting with BrO3-, which species is the oxidising agent?For a reaction in basic medium, which ions are added equal in number to the H+ ions used?In Zn reacting with Cu2+ solution, which species is reduced to metallic copper?