Chemistry Question Papers Class 11 Online Exam Quiz
Chemistry Question Papers Class 11 GK Quiz. Question and Answers related to Chemistry Question Papers Class 11. MCQ (Multiple Choice Questions with answers about Chemistry Question Papers Class 11
What is the buffer capacity if 3 moles are added in 5 litres of the solution to change the pH by 2 units?
Options
A : 0.2
B : 0.5
C : 0.15
D : 0.3
Buffer capacity of a buffer is given as two units for a change in pH by Unity. Then what is the number of moles of acid or base, added in one litre of the solution?
Options
A : 2
B : 0.5
C : 1
D : 4
If 0.20 mol/L CH3COOH and 0.50 mol/L CH3COO– together make a buffer solution, calculate the pH of the solution if the acid dissociation constant of CH3COOH is 1.8 × 10-5.
Options
A : 2.09
B : 5.14
C : 2.65
D : 3.98
If the pH of a substance is given by 3 then what is the pOH of the substance?
Options
A : 3
B : 7
C : 14
D : 11
Note that the pKa here is given by 4.752, a buffer is made using 0.8 M acetic acid and 1 M Sodium Acetate what do you think its pH is(log10/8 = 0.097)?
Options
A : 4.84
B : 4.85
C : 4.849
D : 4.846
Which of the following is not an acidic buffer?
Options
A : Acetic Acid-Sodium acetate
B : Boric acid-borax
C : Ammonium hydroxide-ammonium chloride
D : All are acidic buffers
Buffer solution is destroyed when _____________
Options
A : addition of weak base
B : addition of strong acid or base
C : addition of weak acid
D : addition of a salt
Which of the following is an equation used to calculate the pH of a buffer solution for an acidic buffer?
Options
A : pH = pKa + log[salt]/[acid]
B : pOH = pKa + log[salt]/[acid]
C : pH = pKb + log[salt]/[acid]
D : pH = pKa + log[salt][acid]
Carbonic acid and sodium bicarbonate are present in blood as a buffer.
Options
A : true
B : false
C :
D :
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