Chemistry questions
29404 published questions with worked solutions.
- Identify correct conversion during acidic hydrolysis from the following : (A) starch gives galactose. (B) cane sugar gives equal...
- Concentrated nitric acid is labelled as 75% by mass. The volume in mL of the solution which contains 30 g of nitric acid is...
- Match List-I with List-II List-I (Complex): (A) [CoF6]³⁻ (B) [NiCl4]²⁻ (C) [Co(NH3)6]³⁺ (D) [Ni(CN)4]²⁻ List-II (Hybridisation of...
- Given below are two statements : Statement (I) : According to the Law of Octaves, the elements were arranged in the increasing...
- Which of the following is/are not correct with respect to energy of atomic orbitals of hydrogen atom? (A) 1s < 2p < 3d < 4s (B)...
- Identify correct statements : (A) Primary amines do not give diazonium salts when treated with NaNO2 in acidic condition. (B)...
- Identify the inorganic sulphides that are yellow in colour : (A) (NH4)2S (B) PbS (C) CuS (D) As2S3 (E) As2S5 Choose the correct...
- The spin only magnetic moment (μ) value (B.M.) of the compound with strongest oxidising power among Mn2O3, TiO and VO is _______...
- Consider the following data : Heat of formation of CO2(g) = –393.5 kJ mol⁻¹ Heat of formation of H2O(l) = –286.0 kJ mol⁻¹ Heat of...
- Electrolysis of 600 mL aqueous solution of NaCl for 5 min changes the pH of the solution to 12. The current in Amperes used for...
- A group 15 element forms dπ–dπ bond with transition metals. It also forms hydride, which is a strongest base among the hydrides...
- Total number of molecules/species from following which will be paramagnetic is ______. O_2, O_2^+, O_2^-, NO, NO_2, CO,...
- Total number of nucleophiles from the following is :- NH_3, PhSH, (H_3C)_2S, H_2C=CH_2, HO^-, H_3O^+, (CH_3)_2CO, >=NCH3
- The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising...
- The molar conductivity of a weak electrolyte when plotted against the square root of its concentration, which of the following is...
- At temperature T, compound AB_ 2(g) dissociates as AB_ 2(g) AB_ (g) + 1 2 B_ 2(g) having degree of dissociation x (small compared...
- Choose the correct statements. (A) Weight of a substance is the amount of matter present in it. (B) Mass is the force exerted by...
- The correct increasing order of stability of the complexes based on _o value is : (I) [Mn(CN)_6]^ 3- (II) [Co(CN)_6]^ 4- (III)...
- Match List-I with List-II. List-I (Complex): (A) [MnBr_4]^ 2- (B) [FeF_6]^ 3- (C) [Co(C_2O_4)_3]^ 3- (D) [Ni(CO)_4] List-II...
- For a Mg | Mg²⁺ (aq) || Ag⁺(aq) | Ag the correct Nernst Equation is :