11. Which can act as buffer 1) NH,Cl + HCl 2) CH2COOH + HACO, 43) 40mlof 0.1 MNaCN+20mlof 0.1M HCN 4) NaCl+NaOH

Which of the following may act as buffer? (A) NH_(4)Cl + NH_(4)OH] (B) CH_(3)COOH + CH_(3)COONa (C) 40ml of 0.1M NH_(4)OH +20ml" .of 0.1MHCl (D) All of these

How many of the following combination act as buffer (1) HCl+NaOH (2) CH_3COONa+CH_3COOH (3) H_2SO_4+Na_2SO_4 (4) H_2CO_3+NaOH (5) Na_2B_4O_7+H_3BO_3 (6) NH_4OH +NH_4Cl

How many of the following combination act as buffer (1) HCl+NaOH (2) CH_3COONa+CH_3COOH (3) H_2SO_4+Na_2SO_4 (4) H_2CO_3+NaOH (5) Na_2B_4O_7+H_3BO_3 (6) NH_4OH +NH_4Cl

26.Which of the following mixtures can act as a buffer ? A) NaOH+HCOONa(1:1" molar ratio) B) "HCOOH+NaOH(2:1" molar ratio) C) NH_(4)Cl +NaOH(2:1" molar ratio ) D) HCOOH+NaOH(1:1" molar ratio)

Calculate the pH of each of the following solution (i) 100 ml of 0.1 M CH_(3)COOH mixed with 100 ml of 0.1 M NaOH. (ii) 100 ml of 0.1 M CH_(3)COOH mixed with 50 ml of 0.1 m NaOH (iii) 50 ml of 0.1 M CH_(3)COOH mixed with 100 ml of 0.1 M NaOH. K_(a)(CH_(3)COOH)=1.8xx10^(-5)

Calculate the pH of each of the following solution (i) 100 ml of 0.1 M CH_(3)COOH mixed with 100 ml of 0.1 M NaOH. (ii) 100 ml of 0.1 M CH_(3)COOH mixed with 50 ml of 0.1 m NaOH (iii) 50 ml of 0.1 M CH_(3)COOH mixed with 100 ml of 0.1 M NaOH. K_(a)(CH_(3)COOH)=1.8xx10^(-5)

Which of the following is not a buffer ? HCN +NaCN, HCl+ NaCl ,NH_4OH+ NH_4Cl

{:("Column-I (mixed in equal volumes)" ,, "Column -II (Nature of solution)") , ( "A)" 0.2 M HCN + 0.1 M KOH ,, "P) Strong base"), ("B)" 0.2 M HCl + 0.1 M KCN ,, "Q) basic buffer") , ("C)" 0.2 M NH_(3) + 0.1 M HCl ,, "R) acidic buffer"), ("D)" 0.2 M KOH + 0.1 M NH_(4) Cl ,, "S) Strong acid"):}