NCERT/Class 10/Science/Acids, Bases and Salts

Acids, Bases and Salts

Class 10 · Science

149 questions49 easy50 medium50 hard

Sample Questions

Q1.How does the process of water softening using washing soda work?

  • AWashing soda absorbs the minerals physically
  • BWashing soda reacts with soluble Ca²⁺ and Mg²⁺ salts to form insoluble carbonates, removing them
  • CWashing soda raises the pH so that minerals dissolve more
  • DWashing soda converts hard water salts to NaCl

Q2.Dry HCl gas does not change the colour of dry litmus paper because:

  • AHCl is not an acid
  • BLitmus paper is defective
  • CH+ ions are not formed in the absence of water
  • DHCl gas is neutral

Q3.The colour of methyl orange in acidic solution is:

  • AYellow
  • BRed
  • COrange
  • DPink

Q4.The reaction between an acid and a base to produce salt and water is called:

  • ACombustion
  • BNeutralisation
  • CDecomposition
  • DDisplacement

Q5.Plaster of Paris should be stored in a moisture-proof container because:

  • AIt dissolves in moisture
  • BIt absorbs moisture and sets into hard gypsum
  • CIt changes colour
  • DIt becomes toxic

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

AgClArrhenius theoryBaSO₄ precipitationBaking SodaBleaching PowderCH₃COONaCO₂ detectionCO₂ productionCO₂ testCa(OCl)ClCaCO₃ and Ca(HCO₃)₂CaCO₃ with acidsCaO and waterCaSO₄ insolubilityChlor-alkali ProcessHCl in stomachHydronium IonH⁺ concentrationH₂ productionH₂SO₄ storageImportance of pHIndicatorsNaCl identificationNaHCO₃NaHCO₃ preparationNaOH productionNa₂CO₃ with HClNeutralisation ReactionPlaster of ParisProperties of AcidsProperties of BasesSalts and their PropertiesSolvay processWashing SodaWater of Crystallisationacid-base indicatorsacid-base reactionsacid-base theoriesacid-carbonate reactionacidic solutionsacids reacting with metalsacids with carbonatesacids with metalsamphoteric natureantacidsbaking sodabaking soda as antacidbaking soda usesbasic hydrolysisbee stingbleaching powderbleaching powder preparationblood pHcalcium hydroxidecaustic sodachemical inertness of glasschlor-alkali processchloride testcleaning actioncolour changescommon names of basescommon saltsconcentrated H₂SO₄conjugate acid-basecopper sulphatecorrosiondegree of ionisationdehydrationdilutiondilution of acidsdiprotic acidsdisproportionationdistinguishing solutionsdouble displacementefflorescenceelectrode productselectrolysiselectrolysis of brineenzymes and pHexcess acidexothermic reactionexperimental analysisfire extinguishergypsumhard waterhydrated saltshydrogen gas productionhydrolysisidentifying acidsidentifying acids and basesidentifying unknown substancesidentifying unknownsimportance of pHindustrial chemistryinterpreting pH valuesionisationlime water testlitmus indicatorlogarithmic scalemethyl orangemolarity calculationmole conceptnatural indicatorsneutral saltsneutralisationneutralisation in agricultureneutralisation in daily lifeneutralisation reactionordering by acidity/basicityoxidising acidspH ScalepH and digestionpH below 5.5pH calculationpH of saltspH scalepassivationphenolphthaleinpreparation of bleaching powderproperties of H₂SO₄properties of acidsproperties of basesqualitative analysisrainwater pHrate of reactionreaction inhibitionreaction productsreaction stagesreactivity seriessafety in labsalt hydrolysissaponificationselective dischargesetting mechanismslaked limesoap is basicsodium carbonatesodium carbonate preparationsodium hydrogen carbonatesodium hydroxidesoil pHsolubility of saltsstepwise protonationstoichiometrystrong acid + strong basestrong acid + weak basestrong acidsstrong basessulphate testtaste of acidstemperature conditionsthermal decompositiontitrationtooth decayturmeric as indicatortwo-step reactionuniversal indicatorwashing sodawashing soda useswasp stingwater autoionisationwater of crystallisationwater softeningweak acid + strong baseweak acid + strong base saltsweak acidsweak bases

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