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MCQs4All - Chemistry MCQs for NTS, FPSC, CSS, IELTS, TOEFL

Question. Separation of a solid from its hot saturated solution by cooling is called__________________?
  1. vapourization
  2. solvent extraction
  3. filtration
  4. crystallization
Question. Chemical equilibrium state is_______________?
  1. dynamic state
  2. static state
  3. free state
  4. unidirectional state
Question. _______________ can expel proteons from paraffins ?
  1. Electron
  2. Positron
  3. Neutron
  4. None of above has such capability
Question. In the van der Waals equation (P + n2a / v2) (v – nb) = nRT which of the following statement is not true ?
  1. n2a/v correct for the intermolecular forces.
  2. nb correct for the volume occupied by gas molecules.
  3. at high densities the equation reduces to the ideal gas law
  4. all of the above statements are correct.
Question. ________________ is study about energy of a chemical system ?
  1. thermochemistry
  2. thermodynamics
  3. chemical kinetics
  4. stoichiometry
Question. The atoms of same element having same atomic number but different mass number are called____________________?
  1. Isobars
  2. Isomers
  3. Isotopes
  4. Isotropes

Chemistry MCQs for NTS, FPSC, CSS, PPSC, PMS, UTS, FTS, OTS, Teaching, CT, PTC, SST, B.Ed, M.Ed of past papers
Question. Orgosterol is__________________?
  1. Orgocalciferol
  2. Vitamin D2
  3. Sterol
  4. all of the above
Question. For industrial preparation of CH3CHO catalytic promoter is_________________?
  1. PdCl2
  2. Cu2Cl2
  3. CuCl2
  4. PbCl2
Question. Acid present in acid rain may be__________________?
  1. H2SO4
  2. HNO3
  3. both A and B
  4. none
Question. A single chlorine free radical can destroy how many ozone molecules ?
  1. 10
  2. 100
  3. 10000
  4. 100000
Question. Secondary cell is_____________________?
  1. rechargeable
  2. non rechargeable
  3. electrolytic cell
  4. Daniel cell
Question. A reaction has values of ?H and ?S which are both positive. The reaction __________________?
  1. Is spontaneous
  2. Spontaneity is temperature dependent
  3. Has an increasing free energy
  4. Is non-spontaneous
Question. In how many forms do matter exists ?
  1. Three
  2. Four
  3. Five
  4. Two
Important MCQs
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Question: Nitrogen occurs in plant and animals in the form of ___________?
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