Description : An element `A` in a compound `ABD` has oxidation number `A^(n-)`. It is oxidised by `Cr_(2)O_(7)^(2-)` in acid medium. In the experiment `1.68xx10^(-3
Last Answer : An element `A` in a compound `ABD` has oxidation number `A^(n-)`. It is oxidised by `Cr_(2)O_(7)^(2-)` in acid ... is: A. 3 B. 3-n C. n-3 D. `+n`
Description : A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number? (1) C (2) S (3) H (4) Cl
Last Answer : Cl
Description : Which is an element which never exhibits positive oxidation state in any of its compounds? -Do You Know?
Last Answer : answer:
Description : If an element is in its lowest oxidation state, under proper conditions it can act as :
Last Answer : If an element is in its lowest oxidation state, under proper conditions it can act as : ... as reducing agent D. Neither oxidising nor reducing agent
Description : Positive oxidation state of an element indicates that it is -
Last Answer : Positive oxidation state of an element indicates that it is - A. Is in elementry form B. Oxidised C. Reduced D. Does not changed.
Description : Which element of group V A shows maximum oxidation states ?
Last Answer : Which element of group V A shows maximum oxidation states ? A. bismuth B. phosphorus C. nitrogen D. arsenic
Description : In which of the following cases, the element is oxidised into its highest oxidation state when it reacted with ozone under moist condition.
Last Answer : In which of the following cases, the element is oxidised into its highest oxidation state when it reacted with ozone under ... S B. `I_(2)` C. P D. As
Description : In the above chemical reaction which element does undergo oxidation and which does undergo reduction?
Last Answer : 2Na(s) + H2(g) \(\overset{\Delta}\longrightarrow\) 2NaH(s) In the above ... element does undergo oxidation and which does undergo reduction?
Description : What determine the most likely oxidation state of an element?
Last Answer : the number of electrons the element needs to lose or gain tohave a full valence shell
Description : What is the element in third series the element with maximum oxidation state ?
Last Answer : Mn – manganese -+7-oxidation state
Description : Nichrome wire is used as a heating element I many appliances because (a) it can be drawn out into wires easily (b) it has high resistivity (c) it resists oxidation in air when red hot (d) both (b) and (c) are correct
Last Answer : Ans:(d)
Description : When water itself combines chemically with some element or mineral it is called – (1) Carbonation (2) Desilication (3) Hydration (4) Oxidation
Last Answer : (3) Hydration Explanation: When water combines chemically with other elements, the process is called hydration. In organic chemistry, a hydration reaction is a chemical reaction in which a hydroxyl ... runs in a strong acidic, aqueous solution. Hydration leaves the non-water component intact.
Description : Which element does not show variable oxidation states?
Last Answer : Zinc
Description : Which is an element which never exhibits positive oxidation state in any of its compounds?
Last Answer : Fluorine
Description : Which element of Boron Family is used to prevent oxidation?
Last Answer : Ans.Aluminum
Description : When water itself combines chemically with some element or mineral it is called (1) Carbonation (2) Desilication (3) Hydration (4) Oxidation
Last Answer : Hydration