Chemistry questions
29404 published questions with worked solutions.
- During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in...
- How can an electrochemical cell be converted into an electrolytic cell?
- Arrange the following elements in the increasing order of number of unpaired electrons in it. (A) Sc (B) Cr (C) V (D) Ti (E) Mn...
- Match List-I with List-II. List-I (Alkali Metal): (A) Li (B) Na (C) Rb (D) Cs List-II (Emission Wavelength in nm): (I) 589.2 (II)...Not in JEE Main or NEET syllabus
- The incorrect statement regarding the geometrical isomers of 2-butene is:
- Given below are two statements: Statement I: PF₅ and BrF₅ both exhibit sp³d hybridisation. Statement II: Both SF₆ and...
- The number of ions from the following that are expected to behave as oxidising agent is: Sn⁴⁺, Sn²⁺, Pb²⁺, Tl³⁺, Pb⁴⁺, Tl⁺
- The correct statements among the following, for a "chromatography" purification method is:
- Evaluate the following statements related to group 14 elements for their correctness. (A) Covalent radius decreases down the...
- Match List-I with the List-II List-I (Reaction): (A) N₂(g) + O₂(g) → 2NO(g) (B) 2Pb(NO₃)₂(s) → 2PbO(s) + 4NO₂(g) + O₂(g) (C)...
- Consider the given reaction, identify the major product P. CH₃–COOH → (i) LiAlH₄ (ii) PCC (iii) HCN/⁻OH (iv) H₂O/⁻OH, Δ → "P"
- The correct IUPAC name of [PtBr₂(PMe₃)₂] is:
- Match List-I with List-II List-I (Tetrahedral Complex): (A) TiCl₄ (B) [FeO₄]²⁻ (C) [FeCl₄]⁻ (D) [CoCl₄]²⁻ List-II (Electronic...
- The ratio K_P K_C for the reaction: CO(g) + 12O₂(g) ⇌ CO₂(g) is:
- An amine (X) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains...
- For the reaction at 298 K, 2A + B → C, ΔH = 400 kJ mol⁻¹ and ΔS = 0.2 kJ mol⁻¹ K⁻¹. The reaction will become spontaneous above...
- Total number of species from the following with central atom utilising sp² hybrid orbitals for bonding is ............. NH₃, SO₂,...
- Consider the two different first order reactions given below: A + B → C (Reaction 1), P → Q (Reaction 2). The ratio of the half...
- For hydrogen atom, energy of an electron in first excited state is −3.4 eV, K.E. of the same electron of hydrogen atom is x eV....
- Among VO₂⁺, MnO₄⁻ and Cr₂O₇²⁻, the spin-only magnetic moment value of the species with least oxidizing ability is ………………. BM...