JEE Main questions
34495 published questions with worked solutions.
- 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 +...
- Consider the three aromatic molecules (P, Q and R) whose structures have been given below: P is N,N-dimethylaniline, Q is...
- Match List-I with List-II. List-I (Vitamin): A. Vitamin B₁ B. Vitamin B₂ C. Vitamin B₆ D. Vitamin C List-II (Name): I. Pyridoxine...
- A salt with few drops of conc. HCl gives apple green colour in flame test. The group precipitate of the salt is dissolved in...
- 5.33 g of CrCl₃·6H₂O, which is a 1 : 3 electrolyte, is dissolved in water and is passed through a cation exchanger. The chloride...
- Consider the isomers of hydrocarbon with molecular formula C₅H₁₀. These isomers do not decolourise KMnO₄ solution. These isomers...
- One mole of an alkane (x) requires 8 mole oxygen for complete combustion. Sum of number of carbon and hydrogen atoms in the...
- For reaction A → P, rate constant k = 1.5 × 10³ s⁻¹ at 27°C. If activation energy for the above reaction is 60 kJ mol⁻¹, then the...
- At the transition temperature T, A ⇌ B and ΔG° = 105 − 35logT where A and B are two states of substance X. The transition...
- Let [·] denote the greatest integer function. If the domain of the function f(x) = ^ -1 ( 4x+2[x] 3 ) is [α, β], then 12(α + β)...
- If the set of all solutions of |x² + x − 9| = |x| + |x² − 9| is [α, β] ∪ [γ, ∞), then (α² + β² + γ²) is equal to:
- Let z be a complex number such that |z + 2| = |z − 2| and arg ( z+3 z-i ) = 4. Then |z|² is equal to: