Chemistry questions
29404 published questions with worked solutions.
- 'W' g of a non-volatile electrolyte solid solute of molar mass 'M' gmol ^ -1 when dissolved in 100 mL water, decreases vapour...
- At 27^ C in presence of a catalyst, activation energy of a reaction is lowered by 10 kJ mol ^ -1 . The logarithm ratio of k(...
- Arrange the following carbanions in the decreasing order of stability I. p -Br- C_6H_4 - C H_2 II. C_6H_5 - C H_2 III. p - CH_3O...
- Given below are two statements : Statement I: K>Mg>Al>B is the correct order in terms of metallic character. Statement II :...
- Electricity is passed through an acidic solution of Cu^ 2+ till all the Cu^ 2+ was exhausted, leading to the deposition of 300 mg...
- Consider two Group IV metal ions X^ 2+ and Y^ 2+ . A solution containing 0.01 M X^ 2+ and 0.01 M Y^ 2+ is saturated with H_2S....
- The hydrogen spectrum consists of several spectral lines in Lyman series (L_1, L_2, L_3 ; L_1 has lowest energy among Lyman...
- X and Y are the number of electrons involved, respectively during the oxidation of I^- to I_2 and S^ 2- to S by acidified...
- Two liquids A and B form an ideal solution at temperature T K. At T K, the vapour pressures of pure A and B are 55 and 15 k Nm⁻²...
- Consider the following gaseous equilibrium in a closed container of volume "V" at T(K). P_2(g)+Q_2(g) 2PQ(g) 2 moles each of...
- Pair of species among the following having same bond order as well as paramagnetic character will be-
- The wavelength of light absorbed for the following complexes are in the order. [Co(NH_3)_6]^ 3+ (I); [Co(H_2O)_6]^ 3+ (II);...
- A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3 g of aniline....
- Find out the statements which are not true. A. Resonating structure with more number of covalent bonds and lesser charge...
- The correct order of C, N, O and F in terms of second ionisation potential is
- In the Group analysis of cations, Ba^ 2+ & Ca^ 2+ are precipitated respectively as
- The wavelength of spectral line obtained in the spectrum of Li^ 2+ ion, when the transition takes place between two levels whose...
- Given below are two statements : Statement I : The dipole moment of R-CN is greater than R-NC and R-NC can undergo hydrolysis...
- At 298 K, the mole percentage of N_2(g) in air is 80%. Water is in equilibrium with air at a pressure of 10 atm. What is the mole...
- "X" is an oxoanion of the lightest element of group 7 (in the periodic table). The metal is in +6 oxidation state in "X". The...