19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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 AsO +MnO +2H O → The n…
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
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. Natu…
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, respectively, in bot…
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