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. The metal which is used in thermite process because of its activity is____________________?
  1. iron
  2. copper
  3. aluminium
  4. zinc
Question. List of elements based on hydrogen scale is called________________?
  1. periodic table
  2. groups
  3. periods
  4. electrochemical series
Question. Which of the following is an amide________________?
  1. R-NH2
  2. RCONH2
  3. R – NH – R
  4. C6H5NH2
Question. Which catalyst is used in contact process ?
  1. Fe2O3
  2. V2O5
  3. SO3
  4. Ag2O
Question. In K2Cr2O7 the oxidation number of chromium is____________________?
  1. 7
  2. 6
  3. -7
  4. -6
Question. Across short period the melting and boiling point increase upto __________________?
  1. IIIA group
  2. IVA group
  3. VA group
  4. VIA group
Question. Which of the following is different with respect to physical appearance ?
  1. Arsenic
  2. Phosphorus
  3. Antimony
  4. Bismuth
Question. Plasma is used in_________________?
  1. Fluorescent bulb
  2. Neon signs
  3. Lasers
  4. All of these
Question. If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ?
  1. H2 is deposited at cathode
  2. Colour of the solution becomes fade
  3. Cu is deposited at anode
  4. All are possible
Question. Methanol can be obtained from_________________?
  1. water gas
  2. destructive distillation of wood
  3. methane
  4. all
Question. Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?
  1. one / seventeen
  2. sixteen / seventeen
  3. one / three
  4. two / three
Question. Which one is not the absolute term of the element _________________ ?
  1. Ionization energy
  2. Electron affinity
  3. Electro negativity
  4. Atomic size
Question. For a gas where volume and pressures are 1dm3 and 2 atm respectively what should be its new volume when pressure is increased to 6 atm at constant temperature ?
  1. 1/2dm3
  2. 1/3dm3
  3. 1/4dm3
  4. 2/3dm3