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Chemistry Mcqs

All the following variables are used to describle gases except__________________?

  • (A)  pressure
  • (B)  volume
  • (C)  moles
  • (D)  density
Submitted By :Ali Uppal


Submitted By :Ali Uppal


Submitted By :Ali Uppal


The nucleus of an atom of every element will always contain____________________?

  • (A)  neutrons
  • (B)  protons and electrons
  • (C)  protons
  • (D)  protons and neutrons
Submitted By :Ali Uppal


Which of the following methods is used to estimate hydrogen in an organic compound ?

  • (A)  Combustion method
  • (B)  Dumas method
  • (C)  Kjeldahls method
  • (D)  All of the above methods are for different purposes
Submitted By :Ali Uppal


Isotopes differ in_________________?

  • (A)  properties which depend upon mass
  • (B)  arrangement of electrons in orbitals
  • (C)  chemical properties
  • (D)  all of the above
Submitted By :Ali Uppal


Combustion analysis is performed to determine__________________?

  • (A)  Empirical formula
  • (B)  Molecular mass
  • (C)  Molecular formula
  • (D)  Formula mass
Submitted By :Ali Uppal


Qualitative analysis is carried out for _________________?

  • (A)  identification of elements
  • (B)  estimation of amounts of elements
  • (C)  molar ration of elements
  • (D)  molar volume of elements
Submitted By :Ali Uppal


Which of the following statements is wrong about isotopes ?

  • (A)  they possess different mass number
  • (B)  they possess different physical properties
  • (C)  they possess same chemical properties
  • (D)  they possess different position in the periodic table
Submitted By :Ali Uppal


The mass of decimole of electrons (NA) is___________________?

  • (A)  1.008 mg
  • (B)  0.184 mg
  • (C)  0.054 mg
  • (D)  5.4 mg
Submitted By :Ali Uppal