Chemistry questions
29404 published questions with worked solutions.
- Titration of KI with H_2O_2 in presence of acid is a :
- In the equation, SnCl_2 + 2HgCl_2 Hg_2Cl_2 + SnCl_4 . The equivalent weight of stannous chloride (molecular weight = 190) will be...
- In alkaline condition KMnO_4 reacts as follows: 2 KMnO_4 + 2 KOH 2 K_2MnO_4 + H_2O + O . The eq. wt. of KMnO_4 is:
- The oxidation number of Xe in XeF_4 and XeO_2 is
- In the following reaction M^ x+ + MnO_4^- MO_3^- + Mn^ 2+ + 1 2 O_2 , if one mole of MnO_4^- oxidises 2.5 moles of M^ x+ , then...
- The oxidation state of Fe in Fe_3O_4 is
- Arrange the following as increase in oxidation number (i) Mn^ 2+ (ii) MnO_2 (iii) KMnO_4 (iv) K_2MnO_4
- The equivalent weight of iron in Fe_2O_3 would be:
- The eq. wt. of Na_2S_2O_3 as reductant, in the reaction Na_2S_2O_3 + 5 H_2O + 4 Cl_2 2 NaHSO_4 + 8 HCl , is:
- The eq. wt. of I_2 in the change I_2 IO_3^- is:
- In an experiment 50 mL of 0.1 M solution of a salt reacted with 25 mL of 0.1 M solution of sodium sulphite. The half equation for...
- In which of the following reactions, chlorine acts as an oxidising agent? (i) CH_3CH_2OH + Cl_2 CH_3CHO + HCl (ii) CH_3CHO + Cl_2...
- A group of methods of quantitative chemical analysis involving the measurement of volume of reacting substance is known as:
- The oxidation states of iodine in HIO_4 , H_3IO_5 and H_5IO_6 are respectively
- What volume of 0.40 M Na_2S_2O_3 would be required to react with the I_2 liberated by adding excess of KI to 50 mL of 0.20 M...
- The difference in the oxidation numbers of the two types of sulphur atoms in Na_2S_4O_6 is
- Equivalent mass of IO_4^- when it is converted to I_2 in acid medium:
- The eq. wt. of Fe_3O_4 in Fe_3O_4 + KMnO_4 Fe_2O_3 + MnO_2 is:
- In the reaction, SO_2 + 2 H_2S 3 S + 2 H_2O the substance that oxidizes is,
- Amount of oxalic acid present in a solution can be determined by its titration with KMnO_4 solution in the presence of H_2SO_4 ....