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. Cannizaros reaction takes place through the transfer of ____________________ from complex anion?
  1. hydrogen ion
  2. hydride ion
  3. oxide ion
  4. methoxide ion
Question. What do we call to sudden expansion of plasma ?
  1. Avogadros law
  2. Grahams law of diffusion
  3. Joule Thompson effect
  4. Daltons law of partial pressure
Question. Which of the following option is incorrect about gases ?
  1. All molecules move with same speed
  2. All molecules behave independently
  3. PV / RT = n
  4. All gases cannot be liquefied through Linds Method
Question. The spreading of fragrance or scent in air is due to_______________?
  1. Diffusion
  2. Effusion
  3. Attraction with air
  4. Low dsensity
Question. Which one of the following statement is not correct about benzene ?
  1. On hydrogenation 208 KJ/mole is liberated
  2. C-H bond length in benzene is 1.09 A?
  3. Molecular mass of benzene is 78.108
  4. Resonance energy of benzene is 150.5 K Cal/mole
Question. The molecules of CO2 in dry ice form__________________?
  1. Ionic crystal
  2. Covalent crystal
  3. Molecular crystal
  4. Any type of crystal
Question. Which of the following is the most suitable catalyst for ammonia synthesis ?
  1. Pt
  2. ZnO + Cr2O3
  3. Fe in fused mixture of Al2O3 + SiQ2 + MgO
  4. All of the above
Question. The cooling of molten urea by air in the tower is called______________________?
  1. prilling
  2. evaporation
  3. condensation
  4. crystallization
Question. Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?
  1. primary alcohol
  2. secondary alcohol
  3. tertiary alcohol
  4. dihydric alcohol
Question. Solubility product of AgCl is 2.0 x 10-10 mol2 dm-6. Maximum Concentration of Ag+1 ions in the solution is__________________?
  1. 2.0 x 10-10 mol dm-3
  2. 1.414 x 10-5 mol dm-3
  3. 1.0 x 10-10 mol dm-3
  4. 1.0 x 10-5 mol dm-3
Question. Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?
  1. 0.0002M HCI
  2. 0.2 mole of NaCI with 0.2 mole of HNO3
  3. 0.4 mole of CH3COOH with 0.4 mole of NaOH
  4. 0.4 mole of NH3 with 0.2 mole of HCI
Question. Non-stoichiometric compounds of transition elements are called___________________?
  1. hydrates
  2. hydrides
  3. binary compounds
  4. interstitial compounds
Question. What is the order of kinetics in the SN1 mechanism ?
  1. Zero
  2. First
  3. Second
  4. Third