Chemistry questions
29404 published questions with worked solutions.
- In the following sequence of reactions, CH_3CH_2OH P + I_2 A [ ether ] Mg B HCHO C H_2O D the compound ' D ' is
- In the chemical reaction, CH_3CH_2NH_2 - CHCl_3 + 3KOH (A) + (B) + 3H_2O, the compound (A) and (B) are respectively
- Which one of the following is the strongest base in aqueous solution?
- The ionization enthalpy of hydrogen atom is 1.312 10^6Jmol^ -1 . The energy required to excite the electron in the atom from n =...
- Which one of the following pairs of species have the same bond order?
- Oxidising power of chlorine in aqueous solution can be determined by the parameters indicated below: 12Cl_2(g) 12 _ diss H^ Cl(g)...
- Standard entropy of X_2, Y_2 and XY_3 are 60,40 and 50JK^ -1 mol^ -1 , respectively. For the reaction, 12X_2 + 32Y_2 XY_3, H =...
- For the following three reactions a, b and c, equilibrium constants are given: a. CO(g) + H_2O(g) CO_2(g) + H_2(g); K_1 b....
- Four species are listed below i. HCO_3^- ii. H_3O^+ iii. HSO_4^- iv. HSO_3F Which one of the following is the correct sequence of...
- The pK_a of a weak acid, HA, is 4.80. The pK_b of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding...
- In context with the industrial preparation of hydrogen from water gas (CO + H_2), which of the following is the correct statement?Not in JEE Main or NEET syllabus
- Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis isNot in JEE Main or NEET syllabus
- The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is
- Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised...
- In the following sequence of reactions, the alkene affords the compound ' B ' CH_3CH = CHCH_3 O_3 A H_2O/Zn B. The compound B is
- At 80°C, the vapour pressure of pure liquid ' A ' is 520 mmHg and that of pure liquid ' B ' is 1000 mm Hg. If a mixture solution...
- The vapour pressure of water at 20°C is 17.5 mmHg. If 18 g of glucose (C_6H_ 12 O_6) is added to 178.2 g of water at 20°C, the...
- Given E^ _ Cr^ 3+ /Cr = -0.72 V, E^ _ Fe^ 2+ /Fe = -0.42 V. The potential for the cell Cr|Cr^ 3+ (0.1M)||Fe^ 2+ (0.01M)|Fe is
- For a reaction 12A 2B, rate of disappearance of ' A ' is related to the rate of appearance of 'B' by the expression
- Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their...Not in JEE Main or NEET syllabus