TN State Board Samacheer Kalvi Online Test for 12th Std - Chemistry - English - Ionic Equilibrium

Question 1 Of 10

Which of the following can act as lowery – Bronsted acid well as base?

HCl SO42- HPO42- Br–

Question 2 Of 10

Which of the following relation is correct for degree of hydrolysis of ammonium acetate?

h = (sqrt{frac{K_{h}}{K_{a} cdot K_{b}}})

Question 3 Of 10

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

BF3 PF3 CF4 SiF4

Question 4 Of 10

H2PO4– the conjugate base of …………….

PO43- P2O5 H3PO4 HPO42-

Question 5 Of 10

Concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.24 x 10-4 mol L-1 solubility product of Ag2C2O4 is ………………

2.42 x 10-8 mol3 L-3 2.66 x 10-12 12 mol3 L-3 45 x 10-11 mol3 L-3 5.619 x 10-12 mol3 L-3

Question 6 Of 10

The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5NH) in a 0.10M aqueous pyridine solution (Kb for C5H5N = 1.7 x 10-9) iS ……………..

0.006% 0.013% 0.77% 1.6%

Question 7 Of 10

MY and NY3, are insoluble salts and have the same Ksp values of 6.2 x 10-13 at room temperature. Which statement would be true with regard to MY and NY3?

The salts MY and NY3 are more soluble in O.5 M KY than in pure water The addition of the salt of KY to the suspension of MY and NY3 will have no effect on The molar solubities of MY and NY3 in water are identical The molar solubility of MY in water is less than that of NY3

Question 8 Of 10

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

BF3 PF3 CO F–

Question 9 Of 10

Dissociation constant of NH4OH is 1.8 x 10-5 the hydrolysis constant of NH4Cl would be …………….

1.8 x 10-19 5.55 x 10-10 5.55 x 10-5 1.80 x 10-5

Question 10 Of 10

Which will make basic buffer?

50 mL of 0.1M NaOH + 25mL of 01M CH3COOH 100 mL of 0.1M CH3COOH + 100 mL of 0.1M NH4OH 100 mL of 0.1M HCI + 200 mL of 0.1M NH4OH 100 mL of 0.1M HCI + 100 mL of O.1 M NaOH

Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 12th Standard Chemistry - English Medium - Ionic Equilibrium

Samacheer Kalvi 12th Chemistry - Ionic Equilibrium - Book Back Questions in English Medium