CBSE Class 11 Redox & Electrochemistry — practice questions
42 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 Redox & Electrochemistry in the app →In a redox reaction, oxidation and reduction occur:A half reaction that involves loss of electrons is called:A half reaction that involves gain of electrons is called:An atom of a free uncombined element has an oxidation number of:For a single atom ion, the oxidation number equals the:All alkali metals in their compounds have an oxidation number of:All alkaline earth metals in their compounds carry:Aluminium is regarded as having which oxidation number?The oxidation number of oxygen in most compounds is:In which compounds is the usual oxygen rule an exception?The oxidation number of hydrogen is usually:In lithium hydride the oxidation number of hydrogen is:The algebraic sum of oxidation numbers in a neutral compound is:Are all decomposition reactions redox reactions?In which reaction is an ion in a compound replaced by another?Recovering halogens from their halides requires which process?A reaction where one element is both oxidised and reduced is:A disproportionating element must exist in at least how many states?In a disproportionation, the reacting element starts in a state that is:Decomposition of which compound is a familiar disproportionation?Originally, oxidation described the addition of which element?Dioxygen makes up roughly what share of the atmosphere?Elements commonly occur on earth as their oxides chiefly because of:Burning magnesium in oxygen is an example of the element being:Burning sulphur in oxygen counts as oxidation because oxygen is:Methane burning in oxygen is oxidised owing to the addition of:Looking at methane's combustion, chemists reinterpreted oxidation as removal of:The early definition of oxidation by oxygen addition is described as:Redox reactions are described in terms of the transfer of:The modern view treats oxidation and reduction as reactions of:Oxidation number denotes the oxidation state of an element in a:Oxidation numbers are assigned according to a set of:Disproportionation reactions are a special type of:In disproportionation, one element in one oxidation state is simultaneously oxidised and:A substance undergoing disproportionation must contain an element with at least how many oxidation states?In disproportionation, the element in the reacting substance is in a state that is:Redox reactions are involved in phenomena that are physical and also:Magnesium and sulphur burning in oxygen illustrate oxidation by the definition that is:Which is a redox reaction according to the electron transfer view?The classical definition of oxidation looked at oxygen and:Oxidation number and oxidation state are terms that are:Reduction, in the classical sense, is the reverse of: