Factors Affecting Electrolysis

Q. A solution of $CuS{O}_4$ is electrolysed for $10\text{minutes}$ with a current of $1.5$ amperes. What is the mass of copper deposited at the cathode?

Q. Which of the following does not react with oxygen directly?
$Zn,Ti,Pt,Fe$

Q.

How can you verify Faradays First Law of Electrolysis experimentally?

Q. Which of the following expressions regarding the electrolysis of an electrolytic solution is represented correctly?

1. $m=\frac{QF}{nM}$
2. $m=\frac{QM}{nF}$
3. $m=\frac{ItF}{nM}$
4. $m=\frac{Itn}{MF}$

Q. Select the incorrect statement(s) regarding conductivity of electrolytic (ionic) solution.

1. It increases with increase in size of solvated ions
2. It decreases with increases in temperaure.
3. It increases with increases in temperaure.
4. Both (a) and (b)

Q.

Electrolytic refining is used to purify which of the following metals?

1. $Cu\text{and}Zn$
2. $Zr\text{and}Ti$
3. $Ge\text{and}Si$
4. $Zn\text{and}Hg$

Q. What does negative sign in the expression $E^0{}_{Z{n}^{2+}/Zn}=-0.76V$ mean?

Q. 1. An electric current is passed through silver voltmeter connected to a water voltmeter. The cathode of silver voltmeter weighted 0.108g more at the end of the electrolysis. The volume of oxygen evolved at STP is?

Q. 50. What is the n factor to be used in faraday s equation for electrolysis of water. It is given as 4 but I think it should be 2

Q. Consider a cell given below
$Cu\mid C{u}^2+\mid \mid C{l}^{-}\mid \mid C{l}_2,Pt$
Write the reactions that occur at
anode and cathode.

Q. If equal quantities of electricity three voltameter containing FeSo, Fe (SO4)3 and Fe(NO3)3, then which of the following is not true? (1) Amount of iron deposited in Feso4 and are passed throug . Fe (SO4)3 is equal 2 (2) Amount of iron deposited in Fe(NO3)3 is of (3) Amount of iron deposited in Fe2(SO4)3 and (4) Same gas will evolve in all three cases at the amount of iron deposited in FeSO Fe(NO2), are equal anode

Q. Reduction potential of four elements P, Q, R, Sis-2.90, 0.34, 1.20 and -0.76 and Reactivitydecreases in the order(a) P>Q>R>S(c)R> Q> S> P(b) Q> P> R>S(d) P>S>a>R

Q. 51. The equivalent conductances of sodium acetate, sodium chloride and hydrochloric acid are 83, 127 and 426 ohm cm2/eq at 250^° c respectively.calculate the equivalent conductance of acetic acid solution.

Q. Given that the standard potentials ($E^0$) of $C{u}^{2+}/Cu\text{and}C{u}^{+}/Cu$ are $0.34V$ and $0.522V$ respectively, the $E^0$ of $C{u}^{2+}/C{u}^{+}$ is-

1. $+0.158V$
2. $-0.158V$
3. $-0.182V$
4. $0.182V$

Q. the highest electrical conductivity from the following aqueous 1.0.1 M acetic acid 2.0.1M chloroacetic acid 3.0.1 M fluoroacetic acid 4.0.1 M difluroacetic acid

Q. 82.How much O2 gas will be collected at the anode at 300 K temperature and 1 bar pressure if 2.5 ampere current is passed for one hour in electrolysis of aqueous solution of Na2SO4

Q. The total number of lattice point in an FCC unit cell will be

Q. In electrolysis, if the duration of the passage of current is doubled, then the mass liberated is

1. Doubled
2. Halfed
3. Increased
4. Remains the same

Q. Which of the following statement(s) is/are incorrect for anode electrode?

1. Oxidation reaction occurs at anode
2. Anode act as a source of electrons
3. Anode has negative polarity
4. Both oxidation and reduction occurs at anode

Q. Calculate the potential of hydrogen electrode in contact with a solution whose $pH$ is $10$

Q. Which of the following acids is used in car batteries?

1. Hydrochloric acid
2. Nitric acid
3. Sulphuric acid
4. Carbonic acid

Q. The acid used in lead storage battery is:

1. hydrochloric acid
2. nitric acid
3. phosphoric acid
4. sulphuric acid

Q. Why electrons arent responsible for conduction of electricity in liquids And why ions arent responsible for conduction of electricity in solids

Q. A cell is formed by immersing two $Cd$ electrodes in $CdS{O}_4$ solutions having concentrations of $0.1M$ and $0.5M$ at ${25}^{\circ }C$.
Which of the following(s) is/are true for the given cell?

Take:
$log5\approx 0.7$

1. Cell representation for spontaneous cell is
   $Cd\left(s\right)|C{d}^{2+}(aq,0.1M)||C{d}^{2+}(aq,0.5M)|Cd\left(s\right)$
2. $E_{cell}=0$
3. Cell representation for spontaneous cell is
   $Cd\left(s\right)|C{d}^{2+}(aq,0.5M)||C{d}^{2+}(aq,0.1M)|Cd\left(s\right)$
4. $E_{cell}=0.20$

Q. A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide
State one condition to ensure that the deposit is smooth, firm, and long-lasting.

Q. During the process Of electrolytic refining Of copper, metals that are present as impurities and settle as anode mud are :

1. $\text{Fe and Ni}$
2. $\text{Ag and Au}$
3. $\text{Sn and Ag}$
4. $\text{Pb and zn}$

Q. Given that the standard potential ($E^{\circ }$) of $C{u}^{2+}/Cu$ and $C{u}^{+}/Cu$ are $0.340\text{V}$ and $0.522\text{V}$ respectively. The $E^{\circ }$ of $C{u}^{2+}/C{u}^{+}$ is:

1. $-0.182\text{V}$
2. $-0.158\text{V}$
3. $+0.158\text{V}$
4. $0.182\text{V}$

Q.

i) How many hours does it take to reduce 3 mol of Fe⁺⁺⁺ to Fe⁺⁺ with 2.0 A current? ( F= 96500 C)

ii) State faraday laws of electrolysis.

Q. Why is iodine the most electropositive ?Why not astatine ?

Q. Detail explanation about positive and negative value of electrode potential in electrochemical series? Detailed explanation of graphs when molar conductivities of strong and weak electrolytes are given