Biochemistry Freshers Online Exam Quiz
Biochemistry Freshers GK Quiz. Question and Answers related to Biochemistry Freshers. MCQ (Multiple Choice Questions with answers about Biochemistry Freshers
Calculate the ratio of the concentrations of acetate and acetic acid required in a buffer system of pH 5.30.
Options
A : 3.2
B : 3.3
C : 3.4
D : 3.5
Calculate the pKa of lactic acid, given that when the concentration of lactic acid is 0.010M and the concentration of lactate is 0.087M, the pH is 4.80.
Options
A : 4.0
B : 3.9
C : 3.3
D : 4.1
Calculate the pH of a mixture of 0.10M acetic acid and 0.20M sodium acetate. The pKa of acetic acid is 4.76.
Options
A : 5.1
B : 4.1
C : 6.1
D : 7.1
Which of the following mixture in aqueous solution of equimolar concentration acts as a buffer solution?
Options
A : HNO3 + NaOH
B : H2 SO4 + KOH
C : NH4 OH(excess) + HCl
D : CH3 COOH + NaOH(excess)
For an acid buffer solution the pH is 3. The pH can be increased by ____________
Options
A : Increasing the concentration of salt
B : Increasing the concentration of acid
C : Decreasing the concentration of salt
D : Independent of concentration of acid & salt
Which can act as buffer?
Options
A : NH4 Cl + HCl
B : CH3 COOH + H2 CO3
C : 40ml of 0.1M NaCN + 20ml of 0.1M HCN
D : NaCl + NaOH
1M NaCl and 1M HCl are present in an aqueous solution. The solution is ____________
Options
A : Not a buffer solution with pH < 7
B : Not a buffer solution with pH > 7
C : A buffer solution with pH < 7
D : A buffer solution with pH > 7
Buffer capacity is maximum when __________
Options
A : One mole of NH4Cl is added to two moles of NH4OH
B : One mole of NH4Cl is added to one moles of NH4OH
C : One mole of NH4Cl is added to one mole of NaOH
D : One mole of NaCl is added to one mole of NaOH
The buffer capacity is equal to __________
Options
A : ?n / ?pH
B : pH / ?n
C : ± 1pKa
D : ± 2pKa
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