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Twelfth Grade (Grade 12) Acids and Bases Questions

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Grade 12 Acids and Bases
A solution with a pH of less than 7 is called                .
  1. neutral
  2. acidic
  3. basic
  4. poison
Grade 12 Acids and Bases
Which of the following helps to neutralize acids and bases?
  1. buffers
  2. viscous membranes
  3. selectively permeable membranes
  4. citric acids
Grade 12 Acids and Bases
In volumetric analysis, the auxiliary reagent is known as the                  .
  1. indicator
  2. standard solution
  3. titrant
  4. titrate
Grade 12 Acids and Bases
What is the conjugate acid of NH-2?
  1. NH4OH
  2. NH3
  3. H2N-OH
  4. C6H5NH2
Grade 12 Acids and Bases
Which of the following reactions represents the titration of a weak acid with a strong base?
  1. CH3COOH+NaOH→CH3COONa+H2O
  2. HCl+NaOH→NaCl+H2O
  3. NH4OH+HCl→H2O+NH4Cl
  4. NH4OH+CH3COOH→CH3COONH4+H2O
Grade 12 Acids and Bases
Which of the following salts is formed from a strong acid and a weak base?
  1. NH4Cl
  2. CH3COONH4
  3. KCN
  4. KNO3
Grade 12 Acids and Bases
Which substance is not a Lewis acid?
  1. NH3
  2. BF3
  3. CaCl2
  4. AlCl3
Grade 12 Acids and Bases
Which of the following is used as an indicator for the titration of 0.1 M acetic acid with 0.1 M sodium hydroxide?
  1. Thymol blue
  2. Methyl orange
  3. Bromothymol blue
  4. Phenolphthalein
Grade 12 Acids and Bases
What do you call the solution that is added from the buret in a titrimetric analysis?
  1. Titrant
  2. Titrate
  3. Indicator
  4. Reagent
Grade 12 Acids and Bases
Which of the following substances are considered secondary standards?
  1. Sodium thiosulphate
  2. Silver nitrate
  3. Potassium dichromate
  4. Succinic acid
Grade 12 Acids and Bases
Which of the following substance is used as a primary standard in an acid-base titration?
  1. Potassium Hydrogen Phthalate
  2. Silver Nitrate
  3. Sodium Oxalate
  4. Potassium Dichromate
Grade 12 Acids and Bases
The percentage hydrolysis of 0.01 M solution of sodium acetate at 298 K is 0.024. Calculate the hydrolysis constant of the salt.
  1. Kh=5.76×10-10
  2. Kh=7.56×10-8
  3. Kh=3.54×10-6
  4. Kh=6.7×10-5
Grade 12 Acids and Bases
Which of the following instrumental techniques is used for determining the end point of a volumetric titration?
  1. Conductometry
  2. Chromatography
  3. Mass Spectrometry
  4. Turbidimetry
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