Chemistry Question Bank

aK Cr O bKCl cH SO -> xCrO Cl yKHSO zH O The above equation balances when

In the neutral or faintly alkaline medium, KMnO4 oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from (NEET 2022)

Which of the following reactions are disproportionation reactions? (i) 2Cu Cu Cu -> (ii) 3MnO 4H 2MnO MnO 2H O -> (iii) 2KMnO K MnO MnO O -> (iv) 2MnO 3Mn 2H O 5MnO 4H -> Select the correct option fr…

In acidic medium, H2O2 changes Cr O to CrO5 which has two (–– O –– O –––) bonds. Oxidation state of Cr in CrO5 is (AIMPT 2014)

In which of the following compounds, nitrogen exhibits highest oxidation state? (AIPMT 2012)

I 2S O S O 2I -> In the above reaction: (CPMT 2009)

When copper is treated with a certain concentration of nitric acid, nitric oxide and nitrogen dioxide are liberated in equal volumes according to the equation. o xC u yH NO Cu NO NO NO H O -> The coefficients …

Balance the following equation and choose the correct value of sum of coefficients of the products: CS Cl CCl S Cl ->

The oxidation number of C in CH2O is

In the reaction, ->Br2 + xBrO yCr zH O HCrO H , REDOX REACTIONS the coefficients x, y and z are

For the reaction: NH OCl N H Cl -> in basic medium, the coefficients of NH3,OCl and N2H4 for the balanced equation are respectively

In a balanced equation, H SO xHI H S yI zH O -> the value of x, y and z are

In the reaction, 2IO xSO 4H O 5SO 8H I -> The coefficient of SO2 in balanced equation is

In the redox reaction, xKMnO NH yKNO MnO KOH H O -> x and y are

In the following redox equation, 2+ 2- + 2+ 3+ 2 7 xUO +Cr O +yH aUO +zCr +bH O -> the value of coefficients x, y and z respectively, are

For the reaction, H PO NaOH NaH PO H O -> What is the equivalent weight of H3PO2? (mol. wt. is M)

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