Standard Electrode Potentials

Q. Consider the following statements
(i) Common oxidation state of Pr, Nd, Tb and Dy is +4 state.
(ii) $Z{r}^{4+}\text{and}H{f}^{4+}$ posses almost the same ionic radii.
(iii) $C{e}^{4+}$ can act as an oxidizing agent.
Which of the above is/are true?

1. (i) and (iii)
2. (ii) and (iii)
3. (ii) only
4. (i) and (ii)

Q. The correct order of $E^0{M}^{2+}/M$ values with negative sign for the four successive elements Cr, Mn, Fe and Co is

1. Fe ›Mn›Cr›Co
2. Cr›Mn›Fe›Co
3. Mn›Cr›Fe›Co
4. Cr›Fe›Mn›Co.

Q. Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest $E_{M^{3+}/M^{2+}}^0$ value?

1. Cr(Z = 24)
2. Mn (Z = 25)
3. Fe (Z = 26)
4. Co (Z = 27)

Q. Copper can displace hydrogen gas from dilute acids – True or False?

1. True
2. False

Q. Which of the following element belongs to the third transition series of the periodic table?

1. Sc
2. Re
3. Rh
4. Tc

Q. How many 'series' of transition elements are present in the periodic table?

1. One
2. Two
3. Three
4. Four

Q. Which of the following element belongs to the first transition series of the periodic table?

1. V
2. Zr
3. Ta
4. Y

Q. The oxidation state of mercury in amalgam, calomel and corrosive sublimate is:

1. 0, +1, +2
2. +1, +2, +1
3. +1, +1, +2
4. 0, +1, +1

Q. Which of the following elements have positive reduction potential?

1. Zn
2. Fe
3. Cu
4. All of these

Q.

State your observation, when calcium hydroxide is heated with ammonium chloride crystals.

Q.

Name a gas which turns:
Anhydrous copper sulphate powder blue.

Q.

For which element of first transition series the oxidation potential value
$(M\to M^{2+}+2e^{-})$ is lowest

1. Mn

2. Fe

3. Cu

4. Ni

Q.

State one chemical test between each of the following pairs:
Ferrous Nitrate and lead nitrate.

Q.

What happens when $\mathrm{AgCl}$ is doped with ${\mathrm{CdCl}}_2$. What is the name of this defect?

Q. How can we identify that it is a oxidation potetial or reduction potential (given in the question )? ??

Q.

Is Chromate And Chromium The Same Thing?

Q.

Name two metals which will displace hydrogen from dilute acids, and two metals which will not.

Q. Calculate the work done when 1mole of zinc dissolves in HCl at 273 K in 1) An open beaker 2) A closed container at 300 K

Q. Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is excepted to have the highest $E^0{M}^{3+}/M^{2+}$ value?

1. Co(Z=27)
2. Cr(Z=24)
3. Fe(Z=26)
4. Mn(Z=25)

Q.

Which has higher electron affinity: $\mathrm{Cl}$ or ${\mathrm{Na}}^{+}$?

Q. 1 Ferrous sulphate on heating gives:- 1)SO2 and SO3 2)SO2 only 3)SO3 only 4)H2S only

Q. 1.A substance having higher reduction potential must have lower oxidation potential.A substance having lower reduction potential must have higher oxidation potential.A substance having lower oxidation potential must have higher reduction potential.A substance having higher oxidation potential must have lower reduction potential. ARE THESE STATEMENTS CORRECT? 2.does the value of log x increase with the value of x? are the laws for logx also true for lnx?

Q. The standard reduction potential values of three metallic cations, $X,Y,Z$ are $0.52,-3.03$ and $-1.18\text{V}$ respectively. The order of reducing power of the corresponding metals is:

1. $Y>Z>X$
2. $X>Y>Z$
3. $Z>Y>X$
4. $Z>X>Y$

Q. The correct option(s) to distinguish nitrate salts of $M{n}^{2+}$ and $C{u}^{2+}$ taken separately is (are)

1. $M{n}^{2+}$ shows the characteristic green colour in the flame test
2. Only $C{u}^{2+}$ shows the formation of precipitate by passing $H_{2}S$ in acidic medium
3. Only $M{n}^{2+}$ shows formation of precipitate by passing $H_{2}S$ in faintly basic medium
4. $C{u}^{2+}/Cu$ has higher reduction potential than $M{n}^{2+}/Mn$ (measured under similar conditions)

Q. Metallic elements are described by their standard electrode potential, fusion enthalpy, atomic size, etc. The alkali metals are characterised by which of the following properties?

1. High negative standard electrode potential
2. 
   High boiling point
3. Large atomic size
4. High density

Q.

1. $\left[Ar\right]3d^9$
2. $\left[Ar\right]3d^{10}$
3. $\left[Kr\right]4d^9$
4. $\left[Kr\right]4d^{10}$

Q. Which of the following compound is formed when $C{O}_2$ gas is passed through an aqueous solution of sodium chromate?

1. $Cr{\left(OH\right)}_3$ is precipitated
2. Yellow solution of $N{a}_{2}C{r}_2{O}_7$ is formed
3. No reaction
4. Yellow solution of $C{r}_2{\left(C{O}_3\right)}_2$ is formed

Q. The physical and chemical properties of elements are the periodic function of their atomic numbers. This was stated by :

1. Mendeleev
2. Lothar Meyer
3. Moseley
4. Bohr

Q. If reduction potential of an element is negative of oxidation potential, then why the oxidation potential of water is -1.23 and its reduction potential is -0.83?

Q. What are inner transition elements? Decide which of the following atomic numbers are the atomic numbers of the inner transition elements : $29,59,74,95,102,104$.