Chemistry questions
29404 published questions with worked solutions.
- Number of paramagnetic complexes among the following is _______. [MnBr₄]²⁻, [NiCl₄]²⁻, [Ni(CN)₄]²⁻, [Ni(CO)₄], [CoF₆]³⁻,...
- 'x' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of...
- Consider the reaction 2H₂S(g) + 3O₂(g) → 2H₂O(l) + 2SO₂(g). The magnitude of enthalpy change for the reaction in kJ mol⁻¹ is...
- Solid carbon, CaO and CaCO₃ are mixed and allowed to attain equilibrium at T K. CaCO₃(s) ⇌ CaO(s) + CO₂(g) K_p1 = 0.08 atm; C(s)...
- In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with Fe^ 3+...
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : A reaction...
- Given below are two statements : Statement I : A unit formed by the attachment of a base to 1' position of sugar is known as...
- A compound is formed by two elements A and B. The element B forms cubic close packed structure and atoms of A occupy 1/3 of...Not in JEE Main or NEET syllabus
- The stability of Cu^ 2+ is more than Cu^ + salts in aqueous solution due to :
- Match List-I with List-II. List-I: A. Coke B. Diamond C. Fullerene D. Graphite List-II: I. Carbon atoms are sp^3 hybridised II....
- Some tranquilizers are listed below. Which one from the following belongs to barbiturates?Not in JEE Main or NEET syllabus
- Which of the following statements are NOT correct? A. Hydrogen is used to reduce heavy metal oxides to metals. B. Heavy water is...Not in JEE Main or NEET syllabus
- For a certain reaction, the rate = k[A]^2[B], when the initial concentration of A is tripled keeping concentration of B constant,...
- Which one is an example of heterogenous catalysis?Not in JEE Main or NEET syllabus
- The element expected to form largest ion to achieve the nearest noble gas configuration is :
- The correct order of energies of molecular orbitals of N_2 molecule, is :
- Intermolecular forces are forces of attraction and repulsion between interacting particles that will include : A. dipole - dipole...
- The number of bonds, bonds and lone pair of electrons in pyridine, respectively are :
- Select the correct statements from the following A. Atoms of all elements are composed of two fundamental particles. B. The mass...
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : In equation...