Chemistry questions
29404 published questions with worked solutions.
- Correct statements regarding alkyl halides (R−X) among the following are: A. Alcohol being less polar solvent as compared to...
- An organic compound "x" where molar ratio of C, O and H are equal, on treatment with 50% KOH under reflux followed by...
- A molecule (X) with structure CH₂=CH−CH₂−O−C(CH₃)=CH₂ (allyl isopropenyl ether) under mild acidic condition is hydrolysed to...
- Among Fe²⁺, Fe³⁺, Cr²⁺ and Zn²⁺, the ion that shows positive borax bead test and with highest ionisation enthalpy is:
- Consider the following two half-cell reactions along with the standard reduction potential given: CO₂ + 6H⁺ + 6e⁻ → CH₃OH + H₂O,...
- Number of paramagnetic ions among the following d- and f-block metal ions is _______. Mn²⁺, Cu²⁺, Zn²⁺, Yb²⁺, Sc³⁺, La³⁺, Gd³⁺,...
- The mass of iron converted into Fe₃O₄ by the action of 18 g of steam is: (Given: Molar mass of H, O and Fe are 1, 16 and 56 g...
- Given below are two statements: Statement (I): The correct sequence of bond lengths in the following species is: O₂⁺ < O₂ < O₂⁻ <...
- Consider the following data: (i) 2Al(s) + 6HCl(aq) → Al₂Cl₆(aq) + 3H₂(g), ΔH = −1200 kJ/mol (ii) H₂(g) + Cl₂(g) → 2HCl(g), ΔH =...
- The solubility product constants of Ag₂CrO₄ and AgBr are 32x and 4y respectively at 298 K. The value of ( molarity of Ag _2 CrO...
- An electrochemical cell is constructed using half cells in the direction of spontaneous change: Fe(OH)₂(s) + 2e⁻ → Fe(s) +...
- t₁₀₀% is the time required for the 100% completion of the reaction while t₁/₂ is the time required for 50% of the reaction to be...
- Given below are two statements: Statement (I): The first ionisation enthalpy of the elements Na, Mg, Cl and Ar follows the order...
- Given below are two statements: Statement (I): Oxidising power of halogens decreases in the order F₂ > Cl₂ > Br₂ > I₂, which is...
- Which of the following sets includes all the species that will change the orange colour of K₂Cr₂O₇ in acidic medium?
- Match List-I with List-II. List-I (Chromium (III) Complexes) (en = ethylene diamine): A. [Cr(CN)₆]³⁻ B. [CrF₆]³⁻ C. [Cr(H₂O)₆]³⁺...
- Given below are two statements: Statement (I): 1,2,3-Trihydroxypropane can be separated from water by simple distillation....
- Given below are two statements: Statement (I): Benzyl chloride reacts faster in S_N1 mechanism than ethyl chloride. Statement...
- In IUPAC nomenclature, the correct order of decreasing priority of functional group is:
- Match List-I with List-II. List-I (Mixture of Compounds): A. Diethyl amine + Ethyl amine B. Acetaldehyde + Acetone C. Ethanol +...