Chemistry questions
29404 published questions with worked solutions.
- r = k[A] for a reaction, 50% of A is decomposed in 120 minutes. The time taken for 90% decomposition of A is ________ minutes.
- A diatomic molecule has a dipole moment of 1.2 D. If the bond distance is 1 Å, then fractional charge on each atom is ________ ×...
- If 5 moles of an ideal gas expands from 10 L to a volume of 100 L at 300 K under isothermal and reversible condition then work,...
- In the reaction of potassium dichromate, potassium chloride and sulfuric acid (conc.), the oxidation state of the chromium in the...
- Number of moles of H⁺ ions required by 1 mole of MnO₄⁻ to oxidise oxalate ion to CO₂ is ________.
- 'Adsorption' principle is used for which of the following purification method?Not in JEE Main or NEET syllabus
- The correct sequence of electron gain enthalpy of the elements listed below is A. Ar B. Br C. F D. S Choose the most appropriate...
- The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have...
- Consider the oxides of group 14 elements SiO₂, GeO₂, SnO₂, PbO₂, CO and GeO. The amphoteric oxides are
- The metals that are employed in the battery industries are A. Fe B. Mn C. Ni D. Cr E. Cd Choose the correct answer from the...
- Match List I with List II List I: A. Glucose/NaHCO₃/Δ, B. Glucose/HNO₃, C. Glucose/HI/Δ, D. Glucose/Bromine water List II: I....
- The product (C) in the below mentioned reaction is: CH₃–CH₂–CH₂–Br → (KOH(alc), Δ) → A → (HBr) → B → (Δ, KOH(aq)) → C
- Identify correct statements from below: A. The chromate ion is square planar. B. Dichromates are generally prepared from...
- The correct statements from following are: A. The strength of anionic ligands can be explained by crystal field theory. B....
- For the given reaction, choose the correct expression of K_C from the following. Fe³⁺(aq.) + SCN⁻(aq.) ⇌ (FeSCN)²⁺(aq.)
- Integrated rate law equation for a first order gas phase reaction is given by (where P_i is initial pressure and P_t is total...
- Match List I with List II List I (Technique): A. Distillation, B. Fractional distillation, C. Steam distillation, D. Distillation...
- Identify the mixture that shows positive deviations from Raoult's law.
- Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Alcohols react...
- Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: pK_a value of...