NCERT/Class 11/Chemistry/Some Basic Concepts of Chemistry

Some Basic Concepts of Chemistry

Class 11 · Chemistry

95 questions32 easy42 medium21 hard

Sample Questions

Q1.2.00 x 10^3 g of N2 reacts with 1.00 x 10^3 g of H2 to form NH3. The mass of NH3 formed is:

  • A2428 g
  • B5610 g
  • C56100 g
  • D3000 g

Q2.The mole fraction of ethanol in a solution containing 2 moles of ethanol and 8 moles of water is:

  • A0.2
  • B0.25
  • C0.8
  • D0.5

Q3.The law of multiple proportions was proposed by:

  • ALavoisier
  • BProust
  • CDalton
  • DGay Lussac

Q4.The number 34.216 rounded to three significant figures is:

  • A34.2
  • B34.3
  • C34.0
  • D34.22

Q5.According to Gay Lussac's Law, gases combine in:

  • ASimple ratio by mass
  • BSimple ratio by volume
  • CComplex ratio by mass
  • DComplex ratio by volume

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

Atomic MassAverage Atomic MassAvogadro's NumberClassification of MatterConcentration TermsDalton's Atomic TheoryDimensional AnalysisEmpirical FormulaFormula MassImportance of ChemistryLaws of Chemical CombinationLimiting ReagentMass PercentMolalityMolar MassMolarityMole ConceptMole FractionMolecular FormulaMolecular MassNature of MatterPercentage CompositionProperties of MatterSI UnitsScientific NotationSignificant FiguresStates of MatterStoichiometry

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