MCQs4All - Chemistry Collection

Chemistry MCQs for NTS, FPSC, CSS, PPSC, PMS, UTS, FTS, OTS, Teaching, CT, PTC, SST, B.Ed, M.Ed of past papers

Question. First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
  1. They are more reactive
  2. They have greater atomic radii
  3. They have smaller atomic sizes
  4. All
Question. The diffusion of gases at absolute zero will be________________?
  1. Unchanged
  2. Slightly decreased
  3. Slightly increased
  4. Zero
Question. Clemmensens reduction infolves the reduction of___________________?
  1. ketone
  2. aldehyde
  3. alkane
  4. all of the above
Question. When one hydrogen atom of alkane is removed then it is called________________?
  1. alkene
  2. alkyl
  3. aldehyde
  4. saturated hydrocarbon
Question. Which one of the following will be sulphonated readily ?
  1. Chlorobenzene
  2. Toluene
  3. Nitrobenzene
  4. Benzene
Question. The yellow colour in photochemical smog is due to presence of__________________?
  1. dinitrogen oxide
  2. nitrogen dioxide
  3. chlorine gas
  4. chlorine dioxide
Question. Enzynies that catalyze the transfer of groups within molecule are called_________________?
  1. Isomerases
  2. Lyases
  3. Transferases
  4. Ligases
Question. Decrease in oxidation number is called__________________?
  1. oxidation
  2. reduction
  3. oxidation-reduction
  4. all of above represent same entity
Question. The solid particles only posses_____________________?
  1. Translational motion
  2. Vibrational motion
  3. Rotational motion
  4. All of above motions
Question. Photographic plates are coated with a thin film of _________________?
  1. AgNO3
  2. AgI
  3. AgCl
  4. AgBr
Question. At which electrode the reduction of the solution is occurring in Al-Ag cell_____________?
  1. A
  2. Ag
  3. Both
  4. Neither
Question. Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing___________________?
  1. NH2Cl
  2. NHCI2
  3. NCI2
  4. all of the above
Question. Reacting bromine with benzene in the presence of sunlight will result in_______________?
  1. The rupturing of benzene ring
  2. Substitution reaction
  3. Addition reaction
  4. No-reaction