19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
aK Cr O bKCl cH SO -> xCrO Cl yKHSO zH O The above equation balances when
In the chemical reaction, K2Cr2O7 + XH2SO4 + YSO2 -> K2SO4 + Cr2(SO4)3 + ZH2O, X, Y and Z are
For the redox reaction MnO4– + C2O42– + H+ ->Mn2+ + CO2 + H2O, The correct stoichiometric coefficients of MnO4– , C2O42– and H+ are respectively:
Which of the following reaction is balanced? (a) AsO MnO AsO MnO 2H O -> (b) MnO C O Mn CO -> (c) 3 2 Cu 4HNO Cu(NO ) 2NO 2H O -> (d) H S HNO H O NO S -> Ans (c) Sol. In option (a), 2- - 3- AsO +MnO A…
What is the stoichiometric coefficient of Ca in the reaction? Ca Al Ca Al ->
The ratio of stoichiometric coefficient of Fe2+ and MnO
In the ionic equation, BiO 6H xe Bi 3H O -> the value of x is
In the equation NO H O NO 2H ne -> n stands for
Match the reactions in column I with their respective characteristics given in column II Column – 1 Column – 2 Name and Reaction Characteristics a. P PH H PO -> p. Fractional oxidation number b. C O q. c. CH Cl r. Na…
Assertion: F2 undergoes disproportionation reaction. Reason: Fluorine shows both positive and negative oxidation states.
Which of the following is not a redox reaction? (a) CaCO CaO CO -> (b) O 2H 2H O -> (c) Na H O NaOH H -> (d) MnCl MnCl Cl -> REDOX REACTIONS Ans (a) Sol. a. Oxidation states of Ca and C are +2 and +4, respec…
Which of the following reactions do not involve oxidation-reduction? I.2Rb 2H O 2RbOH H II.2CuI 2CuI I III.NH Br KOH KBr NH H O IV.4KCN Fe CN K Fe CN -> -> -> ->
Which of the following represents a redox reaction? (a) NaOH HCl NaCl H O -> (b) BaCl H SO BaSO 2HCl -> (c) CuSO 2H O Cu OH H SO -> (d) Zn 2HCl ZnCl H -> Ans (d) Sol.
Which of the following reaction is disproportionation? (a) 2H S SO 2H O 3S -> (b) Ca H CaH -> (c) P 3NaOH 3H O PH 3NaH PO ->
Which of the following is not an intermolecular redox reaction? (a) MgCO MgO CO -> (b) O 2H 2H O -> (c) K H O KOH H -> (d) MnBr MnBr Br -> Ans (a) Sol. Intermolecular redox reaction and redox reactions …
Which of the following is not a disproportionation reaction? o I. NH NO N O 2H O II.P 3NaOH 3H O P H NaH P O -> -> REDOX REACTIONS III. PCl PCl Cl IV. IO I H I H O -> ->
The reaction, 3ClO (aq) ClO (aq) 2Cl (aq) -> is an example of
Which of the following is a redox reaction? (a) NaCl KNO NaNO KCl -> (b) CaC O 2HCl CaCl H C O -> (c) Ca(OH) 2NH Cl CaCl 2NH 2H O -> (d) 2K[Ag(CN) ] Zn 2Ag K [Zn(CN) ] ->
Which of the following is a disproportionation reaction? (a) Cu O 2H Cu Cu H O -> (b) 2CrO 2H Cr O H O -> (c) CaCO 2H Ca H O CO -> (d) Cr O 2O H 2CrO H O -> Ans (a) Sol. A chemical reaction in whic…
Which of the following statements about the following reaction is correct? 2Cu O s Cu S s 6Cu s 5O g ->
Which of the following compounds can be oxidised further with a strong oxidising agent?
An element exhibits an oxidation state -2. How many electrons are present in its outer shell?
The oxidation states of sulfur in the anions SO , S O and S O follow the order (a) S O S O SO (b) S O S O SO (c) S O SO S O (d) SO S O S O
Oxidation state of nitrogen is correctly given for Compound Oxidation State
+3 oxidation state is most common in