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. Homogeneous mixture of two or more than two compounds is called__________________?
  1. solution
  2. compound
  3. radical
  4. ion
Question. The volume occupied by 1.4g CO at S.T.P is___________________?
  1. 22.4 dm3
  2. 2.24 dm3
  3. 1.12 cm3
  4. 1.12 dm3
Question. Non-metals usually form _________________ oxides?
  1. Acidic
  2. Amphoteric
  3. Neutral
  4. All of the above
Question. Purines and pyrimidines are_________________?
  1. Enzymes
  2. Nitrogenous bases
  3. Carbohydrates
  4. Lipids
Question. The correct electronic configuration of Cr is____________________?
  1. [Ar]4s23d4
  2. [Ar] 4s23d4
  3. [Ar]4s03d5
  4. [Ar]4s13d5
Question. Which of the following will have highest value of electron affinity_________________?
  1. F
  2. Cl
  3. Br
  4. I
Question. Vapour pressure is not affected by_______________?
  1. Surface area
  2. temperature
  3. intermolecular forces
  4. atmospheric pressure
Question. The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________?
  1. 3
  2. 2.7
  3. 2
  4. 1.5
Question. Energy of activation for backward reaction is less than forward reaction for ___________ reactio?
  1. Endothermic
  2. Exothermic
  3. Moderate
  4. Fast
Question. Second ionization potential of alkali metals are very high due to_______________?
  1. being s-block elements
  2. inert gas configurations
  3. ns1 electronic configuration
  4. being metals
Question. Formaldehyde and lactose are combined to produce throat lozenges named as__________________?
  1. formamint
  2. lactomint
  3. aldomint
  4. formalactose
Question. Size of filter paper is selected according to the amount of__________________?
  1. solution
  2. amount of insoluble solute
  3. amount of soluble solute
  4. Amount of solvent
Question. Which of the following will not form crystalline structure with opporitely charged ions_________________?
  1. H+
  2. H-
  3. Mg2+
  4. Ca2+