CBSE Questions for Class 11 Commerce Economics Use Of Statistical Tools Quiz 1 - MCQExams.com

What is qualitative analysis?
  • Identification of unknown substance by direct observation
  • Identification of unknown substance by chemical tests.
  • Both A & B
  • None of the above
Statistics studies _________ information.
  • qualitative
  • quantitative
  • isolated
  • nominal
The colour of bromine solution is :
  • Red
  • Purple
  • Orange
  • Green
  • Blue
Which term is the best match for the color of a chemical substance students make note of:
  • qualitative data
  • inference
  • observation
  • quantitative data
  • hypothesis
In sodium extract nitrogen is present as:
  • sodamide
  • sodium cyanide
  • sodium nitrite
  • sodium nitrate
Purity of organic liquid can be checked by its characteristic :
  • boiling point
  • volume
  • solubility in water
  • solubility in alcohol
Ammonium nitrate on heating gives ___________.
  • nitric oxide
  • nitrogen
  • nitrogen peroxide
  • nitrous oxide
The indicator which is used to find the strength of caustic soda solution with the help of oxalic acid is:
  • Methyl orange
  • Phenolphthalein
  • Potassium permanganate
  • None of the above
Sodium extract gives blood red colour when treated with $$FeCl_{3}$$. Formation of blood red colour confirms the presence of:
  • only nitrogen
  • only sulphur
  • only halogens
  • both nitrogen and sulphur
Which of the following elements in an organic compound cannot be detected by Lassaigne's test?
  • Nitrogen
  • Sulphur
  • Chlorine
  • Hydrogen
Yellow ammonium sulphide can separate :
  • $$CdS$$ and $${As}_{2}S_{3}$$
  • $${Bi}_{2}{S}_{3}$$ and $$CuS$$
  • $$PbS$$ and $${Bi}_{2}{S}_{3}$$
  • $$HgS$$ and $$PbS$$
The dark turquoise-green solid copper(II) carbonate dissolves in hydrochloric acid to form a :
  • green-blue solution of copper(II) chloride
  • red solution of copper(II) chloride
  • green-blue solution of copper(II) chlorinate
  • green-blue solution of carbon dioxide
The fusion of an organic compound with solid sodium hydroxide is undertaken for testing nitrogen, sulphur and halogens. This test is called:
  • Dumas method
  • Carius method
  • Kjeldahl's method
  • Lassaigne's test
Amongst the following elements present in an organic compound, the one which has no direct test for detection is :
  • $$Cl$$
  • $$N$$
  • $$S$$
  • $$O$$
 YearsProduction of Car P Production of Car QProduction of Car R 
2001 76 59 28
2002 82 62 36
2003 65 4742 
2004 70 54 31
2005 85 57 49
2006 80 68 38
Direction (1-2) : Study the following table which shows the production of three different types of cars over the years.
The difference between the total production of three cars in the year $$2004$$ and $$2006$$ is _____.
  • $$11$$
  • $$43$$
  • $$31$$
  • $$28$$
 YearsProduction of Car P Production of Car QProduction of Car R 
2001 76 59 28
2002 82 62 36
2003 65 4742 
2004 70 54 31
2005 85 57 49
2006 80 68 38
Direction (1-2) : Study the following table which shows the production of three different types of cars over the years.
The average production of which of the following types of cars was maximum?
  • $$Q$$
  • $$P$$
  • $$R$$
  • All are equal
Passing $${H}_{2}S$$ gas into a mixture of $${ Mn }^{ 2+ },{ Ni }^{ 2+ },{ Cu }^{ 2+ },{ Hg }^{ 2+ }$$ ions in acidified aqueous solution precipitates:
  • $$CuS$$ and $$HgS$$
  • $$MnS$$ and $$CuS$$
  • $$MnS$$ and $$NiS$$
  • $$NiS$$ and $$HgS$$
In Lassaigne's test, the organic compound is fused with a piece of sodium metal  in order to:
  • increase the ionisation of the compound
  • decrease the melting point of the compound
  • increase the reactivity of the compound
  • convert the covalent compound into a mixture of ionic compounds
Statistics is a __________.
  • science
  • art
  • language
  • mathematics
Which of the following method is generally adopted by governments?
  • Indirect oral interview
  • Direct personal observation
  • Valid questionnaries
  • Information through agencies
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