Ionic equilibrium

Concentration of the Ag+ ions in a saturated solution of Ag2 2 C O4 is 2.24 10 mol L -4 -1 ×

solubility product of Ag2 2 C O4 is (NEET–2017)

• a) 2.42 10-8 × mol3

  L-3

• b) 2.66 10-12 × mol3

  L-3

• c) 4.5 10-11 × mol3

  L-3

• d) 5.619 × 10–12 mol3

  L-3

Following solutions were prepared by mixing different volumes of NaOH of HCl different

concentrations. (NEET – 2018)

i. 60 mL M

10

HCl + 40mL M

10

NaOH ii. 55 mL M

10

HCl + 45 mL M

10

NaOH

iii. 75 mL M

5

HCl + 25mL M

5

NaOH iv. 100 mL M

10

HCl + 100 mL M

10

NaOH

pH of which one of them will be equal to 1?

• a) iv

• b) i

• c) ii

• d) iii

The solubility of BaSO4

in water is 2.42 10 gL -3 -1 × at 298K. The value of its solubility product

( ) K

sp will be (NEET -2018). (Given molar mass of BaSO =233g mol 4

-1 )

• a) 1.08 10 mol L -14 2 -2 ×

• b)1.08 10 mol L -12 2 -2 ×

• c) 1.08 10 mol L -10 2 -2 ×

• d) 1.08 10 mol L -8 2 -2

pH of a saturated solution of Ca(OH)2 is 9.TheSolubility product (Ksp ) of Ca(OH)2

• a) 0.5 10-15 ×

• b) 0.25 10-10 ×

• c) 0.125 10-15 ×

• d) 0.5 10-10

Conjugate base for Bronsted acids H₂0 and HF are

• a) - + OH and H FH , respectively 2

• b) H O and F , respectively 3

• C) OH^- and F ^- r

• d) H O and H F , respectively

Which will make basic buffer?

• a) 50 mL of 0.1M NaOH+25mL of 0.1M CH3

  COOH

• b) 100 mL of 0.1M CH C3 4 OOH+100 mL of 0.1M NH OH

• c) 100 mL of 0.1M HCl+200 mL of 0.1M NH O4 H

• d) 100 mL of 0.1M HCl+100 mL of 0.1M NaOH

Which of the following fluro compounds is most likely to behave as a Lewis base?

(NEET – 2016)

• a) BF3

• b) PF3

• c) CF4

• d) SiF4

Which of these is not likely to act as Lewis base?

• a) BF3

• b) PF3

• c) CO

• d) F–

. The aqueous solutions of sodium formate, anilinium chloride and potassium cyanide are

respectively

• a) acidic, acidic, basic

• b) basic, acidic, basic

• c) basic, neutral, basic

• d) none of these

The percentage of pyridine (C H N) 5 5 that forms pyridinium ion (C H NH) 5 5 in a 0.10M

aqueous pyridine solution -9

b 55 (K for C H N= 1.7 10 ) × is

• a) 0.006%

• b) 0.013%

• c) 0.77%

• d) 1.6%