Ionic Equilibrium Test 3

Total Questions:50 Total Time: 75 Min

Remaining:

Questions 1 of 50

Question:Aq. solution of sodium cyanide is

Acidic

Amphoteric

Basic

Netural

Questions 2 of 50

Question:Which of the following is the strongest acid

$${H_3}P{O_4}$$

$${H_2}S{O_4}$$

$$HN{O_2}$$

$$C{H_3}COOH$$

Questions 3 of 50

Question:An example of a Lewis acid is

$$NaCl$$

$${25^o}C$$

$$AlC{l_3}$$

$$SnC{l_4}$$

Questions 4 of 50

Question:Which of the following is a conjugated acid-base pair

$$HCl,\,\,NaOH$$

$$N{H_4}Cl,\,\,N{H_4}OH$$

$${H_2}S{O_4},\,\,HS{O_4}^ -$$

$$KCN,\,\,HCN$$

Questions 5 of 50

Question:The solution of strong acid and weak base $$N{H_4}Cl$$is

Acidic

Basic

Neutral

None of the above

Questions 6 of 50

Question:Lewis base is

$$C{O_2}$$

$$S{O_3}$$

$$S{O_2}$$

$$ROH$$

Questions 7 of 50

Question:$$1 \times {10^{ - 12}}$$ of $$1\,\,M\,\,{H_2}S{O_4}$$ will completely neutralize

$$10\,\,ml$$ of $$1\,\,M\,\,NaOH$$ solution

$$10\,\,ml$$ of $$2\,\,M\,\,NaOH$$ solution

$$5\,\,ml$$ of $$2\,\,M\,\,KOH$$ solution

$$5\,\,ml$$ of $$1\,\,M\,\,N{a_2}C{O_3}$$ solution

Questions 8 of 50

Question:The strength of an acid depends on its tendency to

Accept protons

Donate protons

Accept electrons

Donate electrons

Questions 9 of 50

Question:In Lewis acid-base theory, neutralization reaction may be considered as

Formation of salt and water

Competition for protons by acid and base

Oxidation reduction

Coordinate covalent bond formation

Questions 10 of 50

Question:The strongest acid is

$${H_3}As{O_4}$$

$${H_3}As{O_3}$$

$${H_3}P{O_3}$$

$${H_3}P{O_4}$$

Questions 11 of 50

Question:Which of the following is the strongest base

$${C_2}H_5^ -$$

$${C_2}{H_5}CO{O^ - }$$

$${C_2}{H_5}{O^ - }$$

$$O{H^ - }$$

Questions 12 of 50

Question:According to Bronsted-Lowry concept, base is a substance which is

A proton donor

An electron pair acceptor

A proton acceptor

An electron pair donor

Questions 13 of 50

Question:Which of the following is known as hydronium ion

$${H^ + }$$

$${H_2}{O^ + }$$

$${H_3}{O^ + }$$

$${H_2}O_2^ +$$

Questions 14 of 50

Question:The most acidic compound in water is

$$AlC{l_3}$$

$$BeC{l_2}$$

$$FeC{l_3}$$

None of these

Questions 15 of 50

Question:$$B{F_3}$$ is used as a catalyst in several industrial processes due to its

Strong reducing agent

Weak reducing agent

Strong Lewis acid nature

Weak Lewis acid character

Questions 16 of 50

Question:Orthoboric acid in aqueous medium is

Monobasic

Dibasic

Tribasic

All are correct

Questions 17 of 50

Question:According to Lewis concept which one of the following is not a base

$$O{H^ - }$$

$${H_2}O$$

$$A{g^ + }$$

$$N{H_3}$$

Questions 18 of 50

Question:Conjugate base of $$HBr$$is

$${H_2}B{r^ + }$$

$${H^ + }$$

$$B{r^ - }$$

$$B{r^ - }$$

Questions 19 of 50

Question:Molar heat of neutralization of $$NaOH$$ with $$HCl$$ in comparison to that of $$KOH$$ with $$HN{O_3}$$is

Less

More

Equal

Depends on pressure

Questions 20 of 50

Question:On addition of ammonium chloride to a solution of ammonium hydroxide

Dissociation of $$N{H_4}OH$$increases

Concentration of $$O{H^ - }$$increases

Concentration of $$O{H^ - }$$decreases

Concentration of $$NH_4^ +$$ and $$O{H^ - }$$increases

Questions 21 of 50

Question:The solubility product of a salt having general formula $$M{X_2},$$ in water is : $$4 \times {10^{ - 12}}$$. The concentration of $${M^{2 + }}$$ ions in the aqueous solution of the salt is

$$2.0 \times {10^{ - 6}}M$$

$$1.0 \times {10^{ - 4}}M$$

$$1.6 \times {10^{ - 4}}M$$

$$4.0 \times {10^{ - 10}}M$$

Questions 22 of 50

Question:A precipitate of $$AgCl$$ is formed when equal volumes of the following are mixed. $$[{K_{sp}}$$ for $$AgCl = {10^{ - 10}}]$$

$${10^{ - 4}}M\,AgN{O_3}$$ and $${10^{ - 7}}M\,HCl$$

$${10^{ - 5}}M\,AgN{O_3}$$ and $${10^{ - 6}}M\,HCl$$

$${10^{ - 5}}M\,AgN{O_3}$$ and $${10^{ - 4}}M\,HCl$$

$${10^{ - 6}}M\,AgN{O_3}$$ and $${10^{ - 6}}M\,HCl$$

Questions 23 of 50

Question:The solubility of silver chromate in 0.01 M $${K_2}Cr{O_4}$$ is $$2 \times {10^{ - 8}}mol\,d{m^{ - 3}}$$. The solubility product of silver chromate will be

$$8 \times {10^{ - 24}}$$

$$16 \times {10^{ - 24}}$$

$$1.6 \times {10^{ - 18}}$$

$$16 \times {10^{ - 18}}$$

Questions 24 of 50

Question:Which pair will show common ion effect

$$BaC{l_2} + Ba\,{(N{O_3})_2}$$

$$NaCl + HCl$$

$$N{H_4}OH + N{H_4}Cl$$

$$AgCN + KCN$$

Questions 25 of 50

Question:Which is least soluble in water

$$AgCl$$

$$AgF$$

$$AgI$$

$$A{g_2}S$$

Questions 26 of 50

Question:The solubility of $$PbC{l_2}$$is

$$\sqrt {{K_{sp}}}$$

$$^3\sqrt {{K_{sp}}}$$

$$^3\sqrt {\frac{{{K_{sp}}}}{4}}$$

$$\sqrt {8{K_{sp}}}$$

Questions 27 of 50

Question:The solubility product of $$1 \times {10^{ - 5}}$$ is $$1.44 \times {10^{ - 4}}$$ at$${100^o}C$$. The solubility of silver chloride in boiling water may be

$$0.72 \times {10^{ - 4}}\,M$$

$$1.20 \times {10^{ - 2}}\,M$$

$${80^o}C,$$

$$0.5\,M\,HCOOH,$$

Questions 28 of 50

Question:When $$N{H_4}Cl$$ is added to $$N{H_4}OH$$ solution, the dissociation of ammonium hydroxide is reduced. It is due to

Common ion effect

Hydrolysis

Oxidation

Reduction

Questions 29 of 50

Question:At 298 K, the solubility of $$PbC{l_2}$$ is $$2 \times {10^{ - 2}}mol/lit$$, then $${k_{sp}} =$$

$$1 \times {10^{ - 7}}$$

$$3.2 \times {10^{ - 7}}$$

$$1 \times {10^{ - 5}}$$

$$3.2 \times {10^{ - 5}}$$

Questions 30 of 50

Question:Solubility product for salt $$A{B_2}$$ is $$4 \times {10^{ - 12}}$$. Calculate solubility

$$1 \times {10^{ - 3}}gm\,\,mol\,/\,litre$$

$$1 \times {10^{ - 5}}gm\,\,mol\,/\,litre$$

$$1 \times {10^{ - 4}}gm\,\,mol\,/\,litre$$

$$1 \times {10^{ - 2}}gm\,\,mol\,/\,litre$$

Questions 31 of 50

Question:Solubility product of a salt AB is $$1 \times {10^{ - 8}}$$ in a solution in which concentration of A is $${10^{ - 3}}M$$. The salt will precipitate when the concentration of B becomes more than

$${10^{ - 4}}M$$

$${10^{ - 7}}M$$

$${10^{ - 6}}M$$

$${10^{ - 5}}M$$

Questions 32 of 50

Question:Which one of the following is most soluble

$$CuS\,({K_{sp}} = 8 \times {10^{ - 37}})$$

$$MnS\,({K_{sp}} = 7 \times {10^{ - 16}})$$

$$B{i_2}{S_3}\,({K_{sp}} = 1 \times {10^{ - 70}})$$

$$A{g_2}S\,({K_{sp}} = 6 \times {10^{ - 51}})$$

Questions 33 of 50

Question:The solubility product of $$PbC{l_2}$$ at $${20^o}C$$ is $$1.5 \times {10^{ - 4}}.$$ Calculate the solubility

$$3.75 \times {10^{ - 4}}$$

$$3.34 \times {10^{ - 2}}$$

$$3.34 \times {10^2}$$

None of these

Questions 34 of 50

Question:The solubility of $$S{b_2}{S_3}$$in water is $$1.0 \times {10^{ - 5}}$$mol / litre at 298 K. What will be its solubility product

$$108 \times {10^{ - 25}}$$

$$1.0 \times {10^{ - 25}}$$

$$144 \times {10^{ - 25}}$$

$$126 \times {10^{ - 24}}$$

Questions 35 of 50

Question:The ionic product of water at $${25^o}C$$ is $${10^{ - 14}}.$$ The ionic product at $${90^o}C$$ will be

$$1 \times {10^{ - 20}}$$

$$1 \times {10^{ - 12}}$$

$$1 \times {10^{ - 14}}$$

$$1 \times {10^{ - 16}}$$

Questions 36 of 50

Question:Which is generally true about ionic compounds

Have low boiling point

Have low melting point

Soluble in non polar solvents

Conduct electricity in the fused state

Questions 37 of 50

Question:0.2 molar solution of formic acid is ionized 3.2%. Its ionization constant is

$$1 \times {10^{ - 12}}$$

$$2.1 \times {10^{ - 4}}$$

$$1.25 \times {10^{ - 6}}$$

$$1 \times {10^{ - 14}}$$

Questions 38 of 50

Question:The $$pH$$ of a solution in which the $$[{H^ + }] = 0.01,$$is

2

1

4

3

Questions 39 of 50

Question:A is an aqueous acid; B is an aqueous base. They are diluted separately, then

$$pH$$ of A increases and $$pH$$ of B decreases

$$pH$$ of A increases and $$pH$$ of B decreases till $$pH$$ in each case is 7

$$pH$$ of A and B increase

$$pH$$ of B and A decrease

Questions 40 of 50

Question:By adding $$20\,ml$$ $$0.1\,N\,HCl$$ to $$20\,ml$$ $$0.001\,N\,$$ $$KOH,$$ the pH of the obtained solution will be

2

1.3

0

7

Questions 41 of 50

Question:Which of the following salt is acidic

$$N{a_2}S{O_4}$$

$$NaHS{O_3}$$

$$N{a_2}S{O_3}$$

$$N{a_2}S$$

Questions 42 of 50

Question:The $$pH$$ of a simple sodium acetate buffer is given by $$pH = p{K_a} + \log \frac{{[Salt]}}{{[Acid]}}$$$${K_a}$$of acetic acid $$= 1.8 \times {10^{ - 5}}$$If[Salt] =[Acid] = 0.1 M, the $$pH$$of the solution would be about

7

4.7

5.3

1.4

Questions 43 of 50

Question:A compound whose aqueous solution will have the highest $$pH$$

$$NaCl$$

$$N{a_2}C{O_3}$$

$$N{H_4}Cl$$

$$NaHC{O_3}$$

Questions 44 of 50

Question:Which of the following solutions can act as buffer

0.1 molar aq. $$NaCl$$

0.1 molar aq. $$C{H_3}COOH + 0.1$$molar $$NaOH$$

0.1 molar aq. ammonium acetate

None of the above

Questions 45 of 50

Question:In a solution of acid $${H^ + }$$concentration is $${10^{ - 10}}M.$$ The pH of this solution will be

8

6

Between 6 and 7

Between 3 and 6

Questions 46 of 50

Question:$${10^{ - 6}}M\,\,HCl$$ is diluted to 100 times. Its $$pH$$is

6

8

6.95

9.5

Questions 47 of 50

Question:The dissociation constant of HCN is $$5 \times {10^{ - 10}}$$. The $$pH$$ of the solution prepared by mixing 1.5 mole of HCN and 0.15 moles of KCN in water and making up the total volume to $$0.5\,d{m^3}$$ is

7.302

9.302

8.302

10.302

Questions 48 of 50

Question:If $${H^ + }$$ion concentration of a solution is increased by 10 times its pH will be

Increase by one

Remains unchanged

Decrease by one

Increase by 10

Questions 49 of 50

Question:A solution of weak acids is diluted by adding an equal volume of water. Which of the following will not change

Strength of the acid

The value of $$[{H_3}{O^ + }]$$

$$pH$$of the solution

The degree of dissociation of acid

Questions 50 of 50

Question:Which one of the following statements is not true

The conjugate base of $${H_2}PO_4^ -$$ is $$HPO_4^{2 - }$$
$$pH + pOH = 14$$ for all aqueous solutions
The $$pH$$ of $$1 \times {10^{ - 8}}M\,HCl$$ is 8
96,500 coulombs of electricity when passed through a $$CuS{O_4}$$ solution deposits 1 gram equivalent of copper at the cathode