19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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 are same.
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 which the same element in a …
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. 3Fe 4H …
In which of the following compounds is the oxidation state of carbon is zero?
Which of the following statements is wrong?
Which of the following statements is incorrect?
Consider the following unbalanced redox reaction: H₂O + AX + BY → HA + OY + X2B The possible oxidation states of B and Y in BY are, respectively,
Which of the following will not be oxidized by O₃?
In the compound YBa₂Cu₃O₇ which shows superconductivity, what is the oxidation state of Cu? Assume that the rare earth element yttrium is in its usual +3 oxidation state. (a) (b)
Assertion: HNO₃ acts only as an oxidizing agent, while HNO₂ acts both as an oxidizing agent and a reducing agent. Reason: The oxidation number of N in HNO₃ is maximum
Which of the following acids possesses oxidizing, reducing and complex forming properties? REDOX REACTIONS
In which of the following pairs is there the greatest difference in the oxidation numbers of the underlined elements?
In which of the following cases is the oxidation state of N atom wrongly calculated?
In which of the following pairs is there the greatest difference is the oxidation numbers of the oxidation numbers of the central atom?
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