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

Acids, Bases and Salts

Class 10 · Science

149 questions49 easy50 medium50 hard

Sample Questions

Q1.Acid found in ant sting is:

  • AAcetic acid
  • BCitric acid
  • CMethanoic acid
  • DOxalic acid

Q2.Why does Plaster of Paris set hard when mixed with water, and what is the chemical equation for this process?

  • AIt absorbs water physically; no chemical change occurs
  • BCaSO₄·½H₂O + 3/2 H₂O → CaSO₄·2H₂O; it rehydrates to gypsum
  • CCaSO₄ + 2H₂O → Ca(OH)₂ + SO₂; calcium hydroxide cements
  • DIt melts and re-crystallises as a new salt when water is added

Q3.Five solutions A, B, C, D, E have pH 4, 1, 11, 7, 9. The strongly acidic solution is:

  • AA
  • BB
  • CC
  • DD

Q4.Acids turn blue litmus paper to:

  • ABlue
  • BRed
  • CGreen
  • DYellow

Q5.2NaOH(aq) + Zn(s) -> Na2ZnO2(s) + H2(g). The product Na2ZnO2 is:

  • ASodium oxide
  • BSodium zincate
  • CZinc hydroxide
  • DSodium zinc chloride

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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