Ionic Equilibrium Test 7

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:An aqueous solution of ammonia consists of

Answers Choices:

\({H^ + }\)

\(O{H^ - }\)

\(NH_4^ + \)

\(NH_4^ + \) and \(O{H^ - }\)

Questions 2 of 50

Question:\(N{H_4}OH\) is weak base because

Answers Choices:

It has low vapour pressure

It is only slightly ionized

It is not a hydroxide of metal

It has low density

Questions 3 of 50

Question:Correct statement is

Answers Choices:

\(N{H_4}Cl\)gives alkaline solution in water

\(C{H_3}COONa\) gives acidic solution in water

\(C{H_3}COOH\) is a weak acid

\(N{H_4}OH\) is a strong base

Questions 4 of 50

Question:\(C{l^ - }\)is the conjugate base of

Answers Choices:

\(HCl{O_4}\)

\(1 \times {10^{ - 5}},\)

\(C{H_3}COONa\)

\(HCl{O_3}\)

Questions 5 of 50

Question:The strongest base from the following species is

Answers Choices:

\(N{H^{2 - }}\)

\(O{H^ - }\)

\({O^{2 - }}\)

\({S^{2 - }}\)

Questions 6 of 50

Question:The compound HCl behaves as …. in the reaction, \(HCl + HF \to H_2^ + Cl + {F^ - }\)

Answers Choices:

Weak base

Weak acid

Strong base

Strong acid

Questions 7 of 50

Question:The conjugate base of a strong acid is a

Answers Choices:

Strong base

Strong acid

Weak acid

Weak base

Questions 8 of 50

Question:The conjugate base of sulphuric acid is

Answers Choices:

Sodium hydroxide

Hydrochloric acid

Bisulphate ion

Barium hydroxide

Questions 9 of 50

Question:Which is strongest Lewis base

Answers Choices:

\(Sb{H_3}\)

\(As{H_3}\)

\(P{H_3}\)

\(N{H_3}\)

Questions 10 of 50

Question:Phenolphthalein does not act as an indicator for the titration between

Answers Choices:

\(NaOH\) and \(C{H_3}COOH\)

\({H_2}{C_2}{O_4}\) and \(KMn{O_4}\)

\(Ba{(OH)_2}\) and \(HCl\)

\(KOH\)and \({H_2}S{O_4}\)

Questions 11 of 50

Question:Which is not example of Bronsted Lowry theory

Answers Choices:

\(AlC{l_3}\)

\({H_2}S{O_4}\)

\(S{O_2}\)

\(HN{O_3}\)

Questions 12 of 50

Question:When \(FeC{l_3}\) gets soluble in water, then its solution represents which of the characteristics

Answers Choices:

Amphoteric

Acidic

Basic

Neutral

Questions 13 of 50

Question:Lewis acid are those substances

Answers Choices:

Which accept electron pair

Which provide \({H^ + }\)ion in the solution

Which give electron pair

Which accept \(O{H^ - }\)ion

Questions 14 of 50

Question:For an aqueous solution, the characteristic species of acid is

Answers Choices:

\({H^ + }\)ion

\({H_3}{O^ + }\)ion

\({H_2}^ + \)ion

\({H_4}{O^ + }\)ion

Questions 15 of 50

Question:Which is a Lewis base

Answers Choices:

\({B_2}{H_6}\)

\(LiAl{H_4}\)

\(Al{H_3}\)

\(N{H_3}\)

Questions 16 of 50

Question:Let the solubility of an aqueous solution of \(Mg{(OH)_2}\) be x then its \({k_{sp}}\) is

Answers Choices:

\(4{x^3}\)

\(108{x^5}\)

\(27{x^4}\)

\(9x\)

Questions 17 of 50

Question:The solubility product of \(BaS{O_4}\) at \(25^\circ C\) is \(1.0 \times {10^{ - 9}}\). What would be the concentration of \({H_2}S{O_4}\) necessary to precipitate \(BaS{O_4}\) from a solution of \(0.01\,M\,B{a^{2 + }}\)ions

Answers Choices:

\({10^{ - 9}}\)

\({10^{ - 8}}\)

\({10^{ - 7}}\)

\({10^{ - 6}}\)

Questions 18 of 50

Question:Which is the correct alternate for hydrolysis constant of \(N{H_4}CN\)

Answers Choices:

\(\sqrt {\frac{{{K_w}}}{{{K_a}}}} \)

\(\frac{{{K_w}}}{{{K_a} \times {K_b}}}\)

\(\sqrt {\frac{{{K_b}}}{c}} \)

\(\frac{{{K_a}}}{{{K_b}}}\)

Questions 19 of 50

Question:Which of the following salts undergoes hydrolysis

Answers Choices:

\(C{H_3}COONa\)

\(KN{O_3}\)

\(NaCl\)

\({K_2}S{O_4}\)

Questions 20 of 50

Question:At 298 K, the solubility product of \(PbC{l_2}\) is \(1.0 \times {10^{ - 6}}\). What will be the solubility of \(PbC{l_2}\)in moles/litre

Answers Choices:

\(6.3 \times {10^{ - 3}}\)

\(1.0 \times {10^{ - 3}}\)

\(3.0 \times {10^{ - 3}}\)

\(4.6 \times {10^{ - 14}}\)

Questions 21 of 50

Question:Solubility product is

Answers Choices:

The ionic product of an electrolyte in its saturated solution

The product of the solubilities of the ions of the electrolyte

The product of solubilities of the salts

The product of the concentration of the ions

Questions 22 of 50

Question:The solubility product of a sparingly soluble salt \(AB\) at room temperature is \(1.21 \times {10^{ - 6}}\). Its molar solubility is

Answers Choices:

\(1.21 \times {10^{ - 6}}\)

\(1.21 \times {10^{ - 3}}\)

\(1.1 \times {10^{ - 4}}\)

\(1.1 \times {10^{ - 4}}\)

Questions 23 of 50

Question:The precipitation occurs if ionic concentration is

Answers Choices:

Less than solubility product

More than solubility product

Equal to solubility product

None of these

Questions 24 of 50

Question:Which of the following cannot be hydrolysed

Answers Choices:

A salt of weak acid and strong base

A salt of strong acid and weak base

A salt of weak acid and weak base

A salt of strong acid and strong base

Questions 25 of 50

Question:\(pH\)of water is 7. When a substance \(Y\)is dissolved in water, the \(pH\)becomes 13. The substance \(Y\)is a salt of

Answers Choices:

Strong acid and strong base

Weak acid and weak base

Strong acid and weak base

Weak acid and strong base

Questions 26 of 50

Question:In which of the following salt hydrolysis takes place

Answers Choices:

\(KCl\)

\(NaN{O_3}\)

\(C{H_3}COOK\)

\({K_2}S{O_4}\)

Questions 27 of 50

Question:At \({90^o}C\) pure water has \([{H_3}{O^ + }] = {10^{ - 6}}\,M,\) the value of \({K_w}\) at this temperature will be

Answers Choices:

\({10^{ - 6}}\)

\({10^{ - 12}}\)

\({10^{ - 14}}\)

\({10^{ - 8}}\)

Questions 28 of 50

Question:Which salt will give basic solution on hydrolysis

Answers Choices:

\(KCN\)

\(KCl\)

\(N{H_4}Cl\)

\(C{H_3}COON{H_4}\)

Questions 29 of 50

Question:Which of the following sulphides has the lowest solubility product

Answers Choices:

\(FeS\)

\(MnS\)

\(PbS\)

\(ZnS\)

Questions 30 of 50

Question:Electrolytes when dissolved in water dissociate into their constituent ions. The degree of dissociation of an electrolyte increases with

Answers Choices:

Increasing concentration of the electrolyte

Decreasing concentration of the electrolyte

Decreasing temperature

Presence of a substance yielding a common ion

Questions 31 of 50

Question:An electrolyte

Answers Choices:

Gives complex ions in solution

Dissolves in water to give ions

Is ionized in the solid state

Generates ions on passing electric current

Questions 32 of 50

Question:Vant hoff factor of \(BaC{l_2}\) of conc. \(0.01M\) is 1.98. Percentage dissociation of \(BaC{l_2}\) on this conc. Will be

Answers Choices:

49

69

89

98

100

Questions 33 of 50

Question:In which of the following solutions, ions are present

Answers Choices:

Sucrose in water

Sulphur in \(C{S_2}\)

Caesium nitrate in water

Ethanol in water

Questions 34 of 50

Question:The \(pH\) of blood does not appreciably change by a small addition of an acid or a base because blood

Answers Choices:

Contains serum protein which acts as buffer

Contains iron as a part of the molecule

Can be easily coagulated

It is body fluid

Questions 35 of 50

Question:The \(pH\) of a \(0.001\,M\,NaOH\) will be

Answers Choices:

3

2

11

12

Questions 36 of 50

Question:The \(pH\) of a \({10^{ - 10}}M\,NaOH\) solution is nearest to

Answers Choices:

10

7

4

\( - 10\)

Questions 37 of 50

Question:Which will have maximum \(pH\)

Answers Choices:

Distilled water

\(1\,M\,\,N{H_3}\)

\(1\,M\,\,NaOH\)

Water saturated by chlorine

Questions 38 of 50

Question:When rain is accompained by a thunderstorm, the collected rain water will have a pH value

Answers Choices:

Slightly lower than that of rain water without thunderstorm

Slightly higher than that when the thunderstorm is not there

Uninfluenced by occurrence of thunderstorm

Which depends on the amount of dust in air

Questions 39 of 50

Question:Which of the following is the buffer solution of strong acidic nature

Answers Choices:

\(HCOOH + HCO{O^ - }\)

\(C{H_3}COOH + C{H_3}CO{O^ - }\)

\({H_2}{C_2}{O_4} + {C_2}O_4^{2 - }\)

\({H_3}B{O_3} + BO_3^{3 - }\)

Questions 40 of 50

Question:The pH of \(0.1\,M\,NaOH\) is

Answers Choices:

11

12

13

14

Questions 41 of 50

Question:pH of human blood is 7.4. Then \({H^ + }\) concentration will be

Answers Choices:

\(4 \times {10^{ - 8}}\)

\(2 \times {10^{ - 8}}\)

\(4 \times {10^{ - 4}}\)

\(2 \times {10^{ - 4}}\)

Questions 42 of 50

Question:The \(pH\) of \({10^{ - 5}}\)M aqueous solution of \(NaOH\)is

Answers Choices:

5

7

9

11

Questions 43 of 50

Question:The \(pH\) of \({10^{ - 7}}N\,HCl\) is

Answers Choices:

6

6.97

8

10

Questions 44 of 50

Question:When \(100\,\,ml\) of \(M/10\,\,NaOH\) solution and \(50\,\,ml\) of \(M/5\,\,HCl\) solution are mixed, the \(pH\) of resulting solution would be

Answers Choices:

0

7

Less than 7

More than 7

Questions 45 of 50

Question:What is the \(pH\)of \(Ba{(OH)_2}\)if normality is 10

Answers Choices:

4

10

7

9

Questions 46 of 50

Question:Pure water is kept in a vessel and it remains exposed to atmospheric \(C{O_2}\)which is absorbed, then its pH will be

Answers Choices:

Greater than 7

Less than 7

7

Depends on ionic product of water

Questions 47 of 50

Question:The \(pH\) of 0.001 molar solution of \(HCl\) will be

Answers Choices:

0.001

3

2

6

Questions 48 of 50

Question:The condition for minimum change in \(pH\) for a buffer solution is

Answers Choices:

Isoelectronic species are added

Conjugate acid or base is added

\(pH = p{K_a}\)

None of these

Questions 49 of 50

Question:What will be hydrogen ion concentration in moles \(litr{e^{ - 1}}\) of a solution, whose \(pH\) is 4.58

Answers Choices:

\(2.63 \times {10^{ - 5}}\)

\(3.0 \times {10^{ - 5}}\)

\(4.68\)

None of these

Questions 50 of 50

Question:Which of the following is a Lewis base

Answers Choices:

NaOH

\(N{H_3}\)

\(BC{l_3}\)

All of these