19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In the reaction 2FeCl H S 2FeCl 2HCl S ->
In the balanced chemical reaction IO aI bH cH O dI -> a, b, c and d respectively, correspond to
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 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?
Match the reactions given in column I with the number of electrons lost or gained in column II Column – 1 Column – 2 Reaction Number of electrons lost or gained a. Mn OH H O MnO -> p. b. AlCl 3K Al 3KCl -> q. c. …
In which of the following compounds is the oxidation state of carbon is zero?
Which of the following statements is wrong?
A mole of N2H4 loses 10 mol of electrons to form a new compound Y. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? (There is no change in the oxidation number …
MnO4 - is a good oxidizing agent in different medium changing to MnO Mn MnO MnO Mn O -> -> -> -> Changes in oxidation number respectively, are
The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is
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