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. Which of the following will be acidic_____________?
  1. propyne
  2. 1-butyne
  3. ethyne
  4. all of the above
Question. If internal energy of the system is increased ____________________?
  1. Change in state of the system is increased
  2. Temperature of the ystem may rise
  3. Chemical reaction may take place
  4. All
Question. The solution remaining after the formation of crystals is called ___________________?
  1. Mother liquor
  2. Dilute solution
  3. Residue
  4. both A & B
Question. The hydrolysis of Benzenetrizonide will yield three moles of____________________?
  1. Glyoxime
  2. Benzaldehyde
  3. Glycol
  4. Glyoxal
Question. The complete reduction carboxylic acid results in the formation of________________?
  1. Alkyne
  2. Alkene
  3. Alkane
  4. Alcohol
Question. Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be_______________?
  1. 16 gmol-1
  2. 32 gmol-1
  3. 48 gmol-1
  4. 64 gmol-1
Question. In a group ionic radius ?
  1. Increases
  2. Decreases
  3. No change
  4. Variable trend
Question. Voltaic cell is a_________________?
  1. irreversible cell
  2. reversible cell
  3. alkaline cell
  4. all of the above
Question. Which of the following technique is simple and efficient to purify a substance____________________?
  1. Filtration
  2. Sublimation
  3. Crystallization
  4. Solvent extraction
Question. In galvanic cell Zn acts as an anode so its value of standard reduction potential in comparison to coupled electrode would be________________?
  1. greater
  2. lesser
  3. sum of reduction and oxidation potentials
  4. none
Question. Molecular ions are formed by passing______________________?
  1. High energy electron beam
  2. ? – particle
  3. X-rays
  4. All of the above
Question. Number of moles in 1 kg of solvent is called_________________?
  1. normality
  2. molarity
  3. molality
  4. mole fraction
Question. Biocatalytical proteins are_________________?
  1. Enzymes
  2. Substrate
  3. Lipids
  4. any of above