Ionic Equilibrium Test 1

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:A white substance having alkaline nature in solution is

Answers Choices:

\(NaN{O_3}\)

\(N{H_4}Cl\)

\(N{a_2}C{O_3}\)

\(F{e_2}{O_3}\)

Questions 2 of 50

Question:Which of the following can act both as Bronsted acid and Bronsted base

Answers Choices:

\(C{l^ - }\)

\(HCO_3^ - \)

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

\(O{H^ - }\)

Questions 3 of 50

Question:In the equilibrium \(C{H_3}COOH + HF\)\( \leftrightarrow \) \(C{H_3}COO{H_2}^ + + {F^ - }\)

Answers Choices:

\({F^ - }\)is the conjugate acid of \(C{H_3}COOH\)

\({F^ - }\)is the conjugate base of \(HF\)

\(C{H_3}COOH\) is the conjugate acid of \(C{H_3}COO{H_2}^ + \)

\(C{H_3}COO{H_2}^ + \) is the conjugate base of \(C{H_3}COOH\)

Questions 4 of 50

Question:The compound that is not a Lewis acid is

Answers Choices:

\(HSO_4^ - \)

\(AlC{l_3}\)

\(BeC{l_2}\)

\(N{H_3}\)

Questions 5 of 50

Question:\({H^ + }\) is a

Answers Choices:

Lewis acid

Lewis base

Bronsted-Lowry base

None of the above

Questions 6 of 50

Question:Dissociation of \({H_3}P{O_4}\)takes place in following steps

Answers Choices:

1

2

3

4

Questions 7 of 50

Question:\(100\,\,ml\)of \(0.2\,\,M\,\,{H_2}S{O_4}\) is added to \(100\,\,ml\) of \(0.2\,\,M\,\,NaOH.\) The resulting solution will be

Answers Choices:

Acidic

Basic

Neutral

Slightly basic

Questions 8 of 50

Question:\({H_3}B{O_3}\) is

Answers Choices:

Monobasic and weak Lewis acid

Monobasic and weak Bronsted acid

Monobasic and strong Lewis acid

Tribasic and weak Bronsted acid

Questions 9 of 50

Question:(i) A strong acid has a weak conjugate base (ii) An acid is an electron pair acceptor. The above statements (i) and (ii)

Answers Choices:

Correct

Wrong

(i) Correct and (ii) Wrong

(i) Wrong and (ii) Correct

Questions 10 of 50

Question:The pH is less than 7, of the solution of

Answers Choices:

\(FeC{l_3}\)

\(NaCN\)

\(NaOH\)

\(NaCl\)

Questions 11 of 50

Question:What is the conjugate base of \(O{H^ - }\)

Answers Choices:

\({O_2}\)

\({H_2}O\)

\({O^ - }\)

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

Questions 12 of 50

Question:Which of the following is a Lewis base

Answers Choices:

\(C{H_4}\)

\({C_2}{H_5}OH\)

Acetone

Secondary amine

Questions 13 of 50

Question:Conjugate base of \(N{H_3}\) is

Answers Choices:

\(NH_4^ \oplus \)

\(NH_2^ \oplus \)

\(NH_2^\Theta \)

\({N_2}\)

Questions 14 of 50

Question:Which of the following species is an acid and also a conjugate base of another acid

Answers Choices:

\(HSO_4^ - \)

\({H_2}S{O_4}\)

\(O{H^ - }\)

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

Questions 15 of 50

Question:Among the following, the weakest base is

Answers Choices:

\({H^ - }\)

\(CH_3^ - \)

\(C{H_3}{O^ - }\)

\(C{l^ - }\)

Questions 16 of 50

Question:Which of the following is not lewis base

Answers Choices:

\(N{H_3}\)

\(P{H_3}\)

\({(C{H_3})_3}N\)

\(H{N_3}\)

Questions 17 of 50

Question:Neutralization of an acid with a base invariably results in the production of

Answers Choices:

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

\(O{H^ - }\)

\({H_2}O\)

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

Questions 18 of 50

Question:The conjugate acid of \(HPO_4^{2 - }\)is

Answers Choices:

\({H_2}PO_4^ - \)

\(PO_4^{3 - }\)

\({H_3}P{O_4}\)

\({H_3}P{O_3}\)

Questions 19 of 50

Question:The indicator used in the titration of sodium carbonate with sulphuric acid is

Answers Choices:

Phenolphthalein

Methyl orange

Potassium ferrocynide

Potassium ferricynide

Questions 20 of 50

Question:According to Bronsted law, water is a/an

Answers Choices:

Base

Acid

Acid and base both

Salt

Questions 21 of 50

Question:The conjugate base of \({H_2}PO_4^ - \) is

Answers Choices:

\({H_3}P{O_4}\)

\({P_2}{O_5}\)

\(PO_4^{3 - }\)

\(HPO_4^{2 - }\)

Questions 22 of 50

Question:Conjugate base of \(HSO_4^ - \) is

Answers Choices:

\(SO_4^{2 - }\)

\({H_2}S{O_4}\)

\({H_3}SO_4^ + \)

None of these

Questions 23 of 50

Question:Solubility product of a sulphide MS is \(3 \times {10^{ - 25}}\)and that of another sulphide NS is \(4 \times {10^{ - 40}}\). In ammoniacal solution

Answers Choices:

Only NS gets precipitated

Only MS gets precipitated

No sulphide precipitates

Both sulphides precipitate

Questions 24 of 50

Question:Which of the following salts when dissolved in water will get hydrolysed

Answers Choices:

\(NaCl\)

\(N{H_4}Cl\)

\(KCl\)

\(N{a_2}S{O_4}\)

Questions 25 of 50

Question:Solubility product of \(BaC{l_2}\) is \(4 \times {10^{ - 9}}\). Its solubility in moles/litre would be

Answers Choices:

\(1 \times {10^{ - 3}}\)

\(1 \times {10^{ - 9}}\)

\(4 \times {10^{ - 27}}\)

\(1 \times {10^{ - 27}}\)

Questions 26 of 50

Question:Which hydroxide will have lowest value of solubility product at normal temperature \(({25^o}C)\)

Answers Choices:

\(Mg\,{(OH)_2}\)

\(Ca\,{(OH)_2}\)

\(Ba\,{(OH)_2}\)

\(Be\,{(OH)_2}\)

Questions 27 of 50

Question:The solubility of \(AgI\) in \(NaI\) solution is less than that in pure water because

Answers Choices:

AgI forms complex with NaI

Of common ion effect

Solubility product of AgI is less than that of NaI

The temperature of the solution decreases

Questions 28 of 50

Question:The solubility product of \(BaS{O_4}\) is \(1.5 \times {10^{ - 9}}.\) The precipitation in a 0.01 \(M\,\,B{a^{2 + }}\)solution will start, on adding \({H_2}S{O_4}\) of concentration

Answers Choices:

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

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

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

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

Questions 29 of 50

Question:On passing \({H_2}S\) gas through a highly acidic solution containing \(C{d^{2 + }}\)ions, \(CdS\)is not precipitated because

Answers Choices:

Of common ion effect

The solubility of \(CdS\)is low

\(C{d^{2 + }}\)ions do not form complex with \({H_2}S\)

The solubility product of \(CdS\) is low

Questions 30 of 50

Question:Which of the following will occur if a 0.1 M solution of a weak acid is diluted to \(0.01\,M\) at constant temperature

Answers Choices:

\([{H^ + }]\) will decrease to 0.01 M

\(pH\) will decrease

Percentage ionization will increase

\({K_a}\) will increase

Questions 31 of 50

Question:The precipitate of \(Ca{F_2}\)\(({K_{sp}} = 1.7 \times {10^{ - 10}})\) is obtained when equal volumes of the following are mixed

Answers Choices:

\({10^{ - 4}}M\,C{a^{2 + }} + {10^{ - 4}}M\,{F^ - }\)

\({10^{ - 2}}M\,C{a^{2 + }} + {10^{ - 3}}M\,{F^ - }\)

Both 1,2

None of these

Questions 32 of 50

Question:In the reaction: \({H_2}S\) \( \leftrightarrow \) \(2{H^ + } + {S^{ - - }}\), when \(N{H_4}OH\) is added, then

Answers Choices:

\({S^{ - - }}\) is precipitate

No action takes places

Concentration of \({S^{ - - }}\) decreases

Concentration of \({S^{ - - }}\) increases

Questions 33 of 50

Question:What is the solubility of calcium fluoride in a saturated solution, if its solubility product is \(3.2 \times {10^{ - 11}}\)

Answers Choices:

\(2.0 \times {10^{ - 4}}\,mole/litre\)

\(12.0 \times {10^{ - 3}}\,mole/litre\)

\(0.2 \times {10^{ - 4}}\,mole/litre\)

\(2 \times {10^{ - 3}}\,mole/litre\)

Questions 34 of 50

Question:The following equilibrium exists in an aqueous solution of hydrogen sulphide : \({H_2}S\) \( \leftrightarrow \) \({H^ + } + H{S^ - }\)If dilute \(HCl\) is added to an aqueous solution of \({H_2}S\) without any change in temperature

Answers Choices:

The equilibrium constant will change

The concentration of \(H{S^ - }\)will increase

The concentration of undissociated \({H_2}S\) will decrease

The concentration of \(H{S^ - }\)will decrease

Questions 35 of 50

Question:The concentration of KI and KCl in certain solution containing both is 0.001M each. If 20 ml of this solution is added to 20 ml of a saturated solution of AgI in water? What will happen

Answers Choices:

AgCl will be precipitated

AgI will be precipitated

Both AgCl and AgI will be precipitated

There will be no precipitated

Questions 36 of 50

Question:Theory of ionization was given by

Answers Choices:

Rutherford

Graham

Faraday

Arrhenius

Questions 37 of 50

Question:Degree of dissociation of \(0.1\,N\,\,C{H_3}COOH\) is (Dissociation constant \( = 1 \times {10^{ - 5}}\))

Answers Choices:

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

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

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

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

Questions 38 of 50

Question:pH of a \({10^{ - 3}}M\) solution of hydrochloric acid will be

Answers Choices:

1.3

2

3

4.5

Questions 39 of 50

Question:What is the correct relationship between the \(pHs\) of isomolar solutions of sodium oxide \((p{H_1})\), sodium sulphide \((p{H_2}),\) sodium selenide \((p{H_3})\) and sodium telluride \((p{H_4})\)?

Answers Choices:

\(p{H_1} > p{H_2} = p{H_3} > p{H_4}\)

\(p{H_1} < p{H_2} < p{H_3} < p{H_4}\)

\(p{H_1} < p{H_2} < p{H_3} = p{H_4}\)

\(p{H_1} > p{H_2} > p{H_3} > p{H_4}\)

Questions 40 of 50

Question:0.02 M monobasic acid dissociates 2% hence, \(pH\) of the solution is

Answers Choices:

0.3979

1.3979

1.699

3.3979

Questions 41 of 50

Question:A solution of \(MgC{l_2}\) in water has pH

Answers Choices:

< 7

> 7

7

14.2

Questions 42 of 50

Question:An acidic buffer solution can be prepared by mixing solution of

Answers Choices:

Ammonium acetate and acetic acid

Ammonium chloride and hydrochloric acid

Sulphuric acid and sodium sulphate

Acetic acid and sulphuric acid

\(NaCl\) and \(NaOH\)

Questions 43 of 50

Question:A certain buffer solution contains equal concentration of \(3.9 \times {10^{ - 5}}\) and \(HX.\) The \({K_b}\) for \({H^ - }\) is \({10^{ - 10}}.\) The \(pH\)of the buffer is

Answers Choices:

4

7

10

14

Questions 44 of 50

Question:When an acid or alkali is mixed with buffer solution, then \(pH\)of buffer solution

Answers Choices:

Not changes

Changes slightly

Increases

Decreases

Questions 45 of 50

Question:When \(pH\) of a solution decreases, its hydrogen ion concentration

Answers Choices:

Decreases

Increases

Rapidly increases

Remains always constant

Questions 46 of 50

Question:The hydrogen ion concentration in a given solution is \(6 \times {10^{ - 4}}.\) Its \(pH\) will be

Answers Choices:

6

4

3.22

2

Questions 47 of 50

Question:If \(pH\)of \(A,\,\,B,\,\,C\)and \(D\)are 9.5, 2.5, 3.5 and 5.5 respectively, then strongest acid is

Answers Choices:

A

C

D

B

Questions 48 of 50

Question:The concentration of hydrogen ion in water is

Answers Choices:

8

\(1 \times {10^{ - 7}}\)

7

\(1/7\)

Questions 49 of 50

Question:\(pH\) of blood is maintained constant by mechanism of

Answers Choices:

Common ion effect

Buffer

Solubility

All of these

Questions 50 of 50

Question:Assuming complete dissociation, which of the following aqueous solutions will have the same \(pH\)value

Answers Choices:

\(N{H_3}\) of \(0.01\,\,M\,\,HCl\)

\(_{10}\frac{1}{{{K_a}}}\) of \(0.01\,\,M\,\,{H_2}S{O_4}\)

\(50\,\,ml\) of \(_{10}\frac{1}{{{K_a}}}\)

Mixture of 50 \(ml\) of \(0.02\,\,M\,\,{H_2}S{O_4}\) and \(50\,\,ml\) of \(0.02\,\,M\,\,NaOH\)