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CBSE Questions for Class 11 Commerce Economics Use Of Statistical Tools Quiz 3 - MCQExams.com

The compound that does not produce nitrogen has by the thermal decomposition is:
  • NH4NO2
  • (NH4)2SO4
  • Ba(N3)2
  • (NH4)2Cr2O7
Which of the following compounds gives blood red colouration when its Lassaignes extract is treated with alkali and ferric chloride?
  • Thiourea
  • Diphenyl sulphide
  • Phenyl hydrazine
  • Benzamide
N2 is estimated in organic compound by
  • Duma's method
  • Carius method
  • Lassaigne's method
  • None of these
Choose the correct statement regarding the preparation of Lassaigne's extract of a given organic compound.
  • Li can be used on the place of Na
  • Li cannot be used on the place of Na because its compound are covalent in nature
  • Both A and B
  • None of these
Time series is an important statistical technique which is widely used by _________.
  • Scientists
  • Sociologists
  • Research workers
  • All of above
The molecular mass of a non-volatile organic compound is determined either by the Victor Meyer's.
method or Duma's method. 
  • True
  • False
Which among the following is not correctly matched with their colour? 
      Compound                            Colour
  • Na4[Fe(CN)5NOS]                  purple
  • Fe4[Fe(CN)6]3                           blue
  • Fe(CNS)3                                    blood red
  • AgCl                                               light yellow
Molecular mass of a volatile organic solid can be determined by :
  • Silver salt method
  • Platinichloride method
  • Victor Meyer's method
  • Kjeldahl's method
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