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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 [math]NH_2^-[/math]?
  1. [math]NH_4OH[/math]
  2. [math]NH_3[/math]
  3. [math]H_2N"-"OH[/math]
  4. [math]C_6H_5NH_2[/math]
Grade 12 Acids and Bases
Which of the following reactions represents the titration of a weak acid with a strong base?
  1. [math]CH_3COOH + NaOH rarr CH_3COONa + H_2O[/math]
  2. [math]HCl + NaOH rarr NaCl + H_2O[/math]
  3. [math]NH_4OH + HCl rarr H_2O + NH_4Cl[/math]
  4. [math]NH_4OH + CH_3COOH rarr CH_3COONH_4 + H_2O[/math]
Grade 12 Acids and Bases
Which of the following salts is formed from a strong acid and a weak base?
  1. [math]NH_4Cl[/math]
  2. [math]CH_3COONH_4[/math]
  3. [math]KCN[/math]
  4. [math]KNO_3[/math]
Grade 12 Acids and Bases
Which substance is not a Lewis acid?
  1. [math]NH_3[/math]
  2. [math]BF_3[/math]
  3. [math]CaCl_2[/math]
  4. [math]AlCl_3[/math]
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. [math]K_h = 5.76 xx 10^-10[/math][math][/math]
  2. [math]K_h = 7.56 xx 10^-8[/math]
  3. [math]K_h = 3.54 xx 10^-6[/math]
  4. [math]K_h = 6.7 xx 10^-5[/math]
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
Grade 12 Acids and Bases
H₂CO₃ is the conjugate acid of HCO₃⁻.
  1. True
  2. False
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