Ionic Equilibrium Test 4

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Which of the following is the strongest conjugate base

Answers Choices:

\(C{l^ - }\)

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

\(S{O_4}^{ - - }\)

\(N{O_2}^ - \)

Questions 2 of 50

Question:\(NaOH\) is a strong base because

Answers Choices:

It gives \(O{H^ - }\)ion

It can be oxidized

It can be easily ionized

Both 1 and2

Questions 3 of 50

Question:In the equilibrium HClO4+H2O \( \leftrightarrow \) H2O++\(ClO_4^ - \)

Answers Choices:

\(HCl{O_4}\) is the conjugate acid of \({H_2}O\)

\({H_2}O\) is the conjugate acid of \({H_3}{O^ + }\)

\({H_3}{O^ + }\)is the conjugate base of \({H_2}O\)

\(ClO_4^ - \) is the conjugate base of \(HCl{O_4}\)

Questions 4 of 50

Question:Which of the following would be expected to form ionic solution in water

Answers Choices:

\(CC{l_4}\)

\({O_2}\)

\(NaBr\)

\(CHB{r_3}\)

Questions 5 of 50

Question:The conjugate acid of \(HPO_3^{2 - }\)is

Answers Choices:

\({H_3}P{O_4}\)

\({H_3}P{O_3}\)

\({H_2}PO_3^ - \)

\(PO_4^{3 - }\)

Questions 6 of 50

Question:Which of the following compounds are diprotic

Answers Choices:

\({H_2}P{O_5}\)

\({H_2}S\)

\(HCl{O_3}\)

\({H_3}P{O_3}\)

Questions 7 of 50

Question:The salt that forms neutral solution in water is

Answers Choices:

\(N{H_4}Cl\)

\(NaCl\)

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

\({K_3}B{O_3}\)

Questions 8 of 50

Question:The aqueous solution of which one of the following is basic

Answers Choices:

\(HOCl\)

\(NaHS{O_4}\)

\(N{H_4}N{O_3}\)

\(NaOCl\)

Questions 9 of 50

Question:An aqueous solution of aluminium sulphate would show

Answers Choices:

An acidic reaction

A neutral reaction

A basic reaction

Both acidic and basic reaction

Questions 10 of 50

Question:The aqueous solution of \(AlC{l_3}\) is acidic due to the hydrolysis of

Answers Choices:

Aluminium ion

Chloride ion

Both aluminium and chloride ion

None of these

Questions 11 of 50

Question:The aqueous solution of ammonium chloride is

Answers Choices:

Neutral

Basic

Acidic

Amphoteric

Questions 12 of 50

Question:Which of the following is not a Lewis acid

Answers Choices:

\(B{F_3}\)

\(AlC{l_3}\)

\(HCl\)

\(LiAl{H_4}\)

Questions 13 of 50

Question:In a saturated solution of electrolyte, the ionic product of their concentration are constant at constant temperature and this constant for electrolyte is known as

Answers Choices:

Ionic product

Solubility product

Ionization constant

Dissociation constant

Questions 14 of 50

Question:Some salts although containing two different metallic elements give test for only one of them in solution. Such salts are

Answers Choices:

Double salts

Normal salts

Complex salts

Basic salts

Questions 15 of 50

Question:A white salt is readily soluble in water and gives a colourless solution with a \(pH\)of about 9. The salt would be

Answers Choices:

\(N{H_4}N{O_3}\)

\(C{H_3}COONa\)

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

\(CaC{O_3}\)

Questions 16 of 50

Question:If the solubility of a sparingly soluble salt of the type \(B{A_2}\) (giving three ions on dissociation of a molecule) is \(x\) moles per litre, then its solubility product is given by

Answers Choices:

\({x^2}\)

\(2{x^3}\)

\(4{x^2}\)

\(4{x^3}\)

Questions 17 of 50

Question:The solubility product of silver sulphide is \(3.2 \times {10^{ - 11}}.\)Its solubility at the experimental temperature is

Answers Choices:

\(2 \times {10^{ - 4}}\)moles per litre

\(6 \times {10^{ - 6}}\)moles per litre

\(1.2 \times {10^{ - 5}}\)moles per litre

\(8 \times {10^{ - 4}}\)moles per litre

Questions 18 of 50

Question:At equilibrium, if to a saturated solution of \(NaCl,\,HCl\) is passed, \(NaCl\) gets precipitated because

Answers Choices:

\(HCl\) is a strong acid

Solubility of \(NaCl\) decreases

Ionic product of \(NaCl\) becomes greater than its \({K_{sp}}\)

\(HCl\) is a weak acid

Questions 19 of 50

Question:Which one of the following compounds is a Lewis acid

Answers Choices:

\(PC{l_3}\)

\(BC{l_3}\)

\(NC{l_3}\)

\(CHC{l_3}\)

Questions 20 of 50

Question:In hydrolysis of a salt of weak acid and strong base, \({A^ - } + {H_2}O\) \( \leftrightarrow \) \(HA + O{H^ - },\) the hydrolysis constant \(({K_h})\) is equal to.…

Answers Choices:

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

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

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

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

Questions 21 of 50

Question:At infinite dilution, the percentage ionisation for both strong and weak electrolytes is

Answers Choices:

1%

20%

50%

100%

Questions 22 of 50

Question:The degree of ionization of a compound depends on

Answers Choices:

Size of solute molecules

Nature of solute molecules

Nature of vessel used

Quantity of electricity passed

Questions 23 of 50

Question:The best conductor of electricity is a 1.0 M solution of

Answers Choices:

Boric acid

Acetic acid

Sulphuric acid

Phosphoric acid

Questions 24 of 50

Question:The colour of an electrolyte solution depends on

Answers Choices:

The nature of the anion

The nature of the cation

The nature of both the ions

The nature of the solvent

Questions 25 of 50

Question:At 25\(^\circ \)C, the dissociation constant of a base BOH is \(1.0 \times {10^{ - 12}}\). The concentration of Hydroxyl ions in 0.01 M aqueous solution of the base would be

Answers Choices:

\(2.0 \times {10^{ - 6}}mol\,{L^{ - 1}}\)

\(1.0 \times {10^{ - 5}}mol\;{L^{ - 1}}\)

\(1.0 \times {10^{ - 6}}mol\,{L^{ - 1}}\)

\(1.0 \times {10^{ - 7}}mol\;{L^{ - 1}}\)

Questions 26 of 50

Question:Aqueous solution of \(HCl\) has the \(pH = 4\). Its molarity would be

Answers Choices:

4 M

0.4 M

0.0001 M

10 M

Questions 27 of 50

Question:The compound whose 0.1 M solution is basic is

Answers Choices:

Ammonium acetate

Calcium carbonate

Ammonium sulphate

Sodium acetate

Questions 28 of 50

Question:The following reaction is known to occur in the body \(C{O_2} + {H_2}O\) \( \leftrightarrow \) \({H_2}C{O_3}\) \( \leftrightarrow \) \({H^ + } + HCO_3^ - .\) If \(C{O_2}\)escapes from the system

Answers Choices:

\(pH\) will decrease

Hydrogen ion concentration will decrease

\({H_2}C{O_3}\) concentration will be unaltered

The forward reaction will be promoted

Questions 29 of 50

Question:The pH of the solution containing \(10\,ml\) of a \(0.1\,N\,NaOH\) and \(10\,ml\) of \(0.05\,N\) \({H_2}S{O_4}\) would be

Answers Choices:

1

0

7

> 7

Questions 30 of 50

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

Answers Choices:

7.01

Between 7 and 8

Between 9 and 10

Greater than 10

Questions 31 of 50

Question:\(20ml\) of \(0.5N\,HCl\) and \(35\,ml\) of \(0.1N\,NaOH\) are mixed. The resulting solution will

Answers Choices:

Be neutral

Be basic

Turn phenolphthalein solution pink

Turn methyl orange red

Questions 32 of 50

Question:The \(pH\) of a 0.02 M solution of hydrochloric acid is

Answers Choices:

2

1.7

0.3

2.2

Questions 33 of 50

Question:Amongst the following solutions, the buffer solution is

Answers Choices:

\(N{H_4}Cl + N{H_4}OH\)solution

\(N{H_4}Cl + NaOH\)solution

\(N{H_4}OH + HCl\)solution

\(NaOH + HCl\)solution

Questions 34 of 50

Question:The \(pH\) of solution having \([O{H^ - }] = {10^{ - 7}}\) is

Answers Choices:

7

14

Zero

\( - 7\)

Questions 35 of 50

Question:At \({80^o}C,\) distilled water has \([{H_3}{O^ + }]\) concentration equal to \(1 \times {10^{ - 6}}\,\,mole/litre.\) The value of \({K_w}\)at this temperature will be

Answers Choices:

\(1 \times {10^{ - 6}}\)

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

\(1 \times {10^{ - 12}}\)

\({K_{SP}}\)

Questions 36 of 50

Question:The \(pH\) value of \(0.1\,\,M\,\,NaOH\) solution is (when there is a given reaction \([{H^ + }]\,[O{H^ - }] = {10^{ - 15}}\))

Answers Choices:

13

12

11

2

Questions 37 of 50

Question:The \(pH\) of a solution obtained by mixing \(50\,\,ml\) of \(0.4\,\,N\,\,HCl\) and \(50\,\,ml\) of \(0.2\,\,N\,\,NaOH\)is

Answers Choices:

\( - \log 2\)

\( - \log 0.2\)

1

2

Questions 38 of 50

Question:Which of the following is a buffer

Answers Choices:

\(NaOH + C{H_3}COONa\)

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

\(1 \times {10^{ - 4}}\)

\(N{H_4}OH + C{H_3}COON{H_4}\)

Questions 39 of 50

Question:The concentration of hydronium \(({H_3}{O^ + })\) ion in water is

Answers Choices:

Zero

\(1 \times {10^7}\,gm\,\,ion/litre\)

\(1 \times {10^{ - 14}}\,gm\,\,ion/litre\)

\(1 \times {10^{ - 7}}\,gm\,\,ion/litre\)

Questions 40 of 50

Question:A solution whose pH value is less than 7 will be

Answers Choices:

Basic

Acidic

Neutral

Buffer

Questions 41 of 50

Question:The \(pH\) of a \({10^{ - 10}}\) molar \(HCl\) solution is approximately

Answers Choices:

10

7

1

14

Questions 42 of 50

Question:The \({H^ + }\)ion concentration is \(1.0 \times {10^{ - 6}}\) mole/litre in a solution. Its pH value will be

Answers Choices:

12

6

18

24

Questions 43 of 50

Question:Which buffer solution out of the following will have \(pH > 7\)

Answers Choices:

\(C{H_3}COOH + C{H_3}COONa\)

\(HCOOH + HCOOK\)

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

\(N{H_4}OH + N{H_4}Cl\)

Questions 44 of 50

Question:The \(p{K_a}\) of equimolecular sodium acetate and acetic acid mixture is 4.74. If \(pH\) is

Answers Choices:

7

9.2

4.74

14

Questions 45 of 50

Question:The gastric juice in our stomach contains enough \(HCl\) to make the hydrogen ion concentration about \(0.01\,\,mole/litre.\) The \(pH\)of gastric juice is

Answers Choices:

0.01

1

2

14

Questions 46 of 50

Question:Addition of which chemical will decrease the hydrogen ion concentration of an acetic acid solution

Answers Choices:

\(N{H_4}Cl\)

\(A{l_2}{(S{O_4})_3}\)

\(AgN{O_3}\)

\(HCN\)

Questions 47 of 50

Question:\(Ka\)of \({H_2}{O_2}\)is of the order of

Answers Choices:

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

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

\({10^{ - 16}}\)

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

Questions 48 of 50

Question:Equivalent weight of an acid

Answers Choices:

Depends on the reaction involved

Depends upon the number of oxygen atoms present

Is always same

None of the above

Questions 49 of 50

Question:The \(pH\)value of \(0.1\,\,M\,\,HCl\)is approximately 1. What will be the approximate \(pH\)value of 0.05 \(M\,\,{H_2}S{O_4}\)

Answers Choices:

0.05

0.5

1

2

Questions 50 of 50

Question:The \({K_{sp}}\) of \(Mg{(OH)_2}\) is \(1 \times {10^{ - 12}},\,0.01M\,Mg{(OH)_2}\) will precipitate at the limiting pH

Answers Choices:

3

9

5

8