Chemistry questions
29404 published questions with worked solutions.
- In the reduction of dichromate by Fe (II), the number of electrons involved per chromium atom is :
- For redox reaction, MnO_4^- + C_2O_4^ 2- + H^+ Mn^ 2+ + CO_2 + H_2O coefficient of reactants in balanced states are MnO_4^- ,...
- In the titration of CuSO_4 vs. Hypo in presence of KI, which statement is wrong?
- The number of mole of ferrous oxalate oxidised by one mole of KMnO_4 is:
- Oxalic acid on reacting with acidified KMnO_4 is oxidised to :
- What weight of HNO_3 is needed to convert 5 g I_2 into HIO_3 , HNO_3 NO ?
- In the compounds KMnO_4 and K_2Cr_2O_7 , the highest oxidation state is of the element
- What weight of HNO_3 is required to make 1 litre of 2N solution to be used as an oxidising agent in the reaction? 3Cu + 8HNO_3...
- The equivalent weight of SnCl_2 in the reaction, SnCl_2 + Cl_2 SnCl_4 is :
- The oxidation number of oxygen in KO_3 , Na_2O_2 is
- The number of mole of oxalate ions oxidized by one mole of MnO_4^- ion is:
- In the reaction, Cr_2O_7^ 2- + 14H^+ + 6I^- 2Cr^ 3+ + 3H_2O + 3I_2 , The eq.wt. of Cr^ 3+ is :
- What is the normality of a KMnO_4 solution to be used as an oxidant in acid medium, which contain 15.8 g of the compound in 100...
- When KMnO_4 as oxidising agent and ultimately forms MnO_4^ 2- , MnO_2 , Mn_2O_3 and Mn^ 2+ , the number of electrons transferred...
- What weight of FeSO_4 (mol. wt. = 152) will be oxidised by 200 mL of normal KMnO_4 solution in acidic solution?
- Among the properties given below, the set of properties shown by CN^- ion towards metal species is : 1. Reducing; 2. Oxidising ;...
- In which of the following reactions, hydrogen is acting as an oxidising agent?
- What weight of HNO_3 is needed to convert 5 g of iodine into iodic acid according to the reaction, I_2 + HNO_3 HIO_3 + NO_2 +...
- KMnO_4 acts as ....... indicator in its redox titrations.
- A 0.518 g sample of lime stone is dissolved in HCl and then the calcium is precipitated as CaC_2O_4 . After filtering and washing...