Origins of government

Q. Given
$E_{C{l}_2/C{l}^{-}}^{\circ }=1.36V,E_{C{r}^{3+}/Cr}^{\circ }=-0.74V{E}_{C{r}_2{O}_7^{2-}/C{r}^{3+}}^{\circ }=1.33V,E_{Mn{O}_4^{-}/M{n}^{2+}}^{\circ }=1.51V$
Among the following, the strongest reducing agent is

1. $Cr$
2. $M{n}^{2+}$
3. $C{r}^{3+}$
4. $C{l}^{-}$

Q.

The British described the tribal people as ____________.

Q.

Which of the below given options are correct for the electrolysis of aqueous copper sulphate solution with platinum electrode?

1. Copper is oxidized.

2. oxygen is evolved at cathode

3. Platinum is deposited

4. oxygen is evolved at anode

Q. Which is the institution that maintains social order and provides public services?

1. School
2. CBI
3. Government
4. Election Commission

Q. Who, among the following, are required to run a government?

1. Criminals
2. Teachers
3. Police
4. Ministers

Q. Which among the following groups never needed any form of government?

1. Villagers
2. The Harappans
3. People in cities
4. Tribals

Q. Primitive communities did not see a strong need for a government whereas the well established communities needed a government to administer them.

1. tribal
2. agricultural
3. urban
4. religious

Q. For the reduction of /( NO_{3}^{\ominus } \) ion in an aqueous solution, $E^{\ominus }$ is +0.96 V, the values of $E^{\ominus }$ for some metal ions are given below:
$\left(i\right)V^{2+}\left(aq\right)+2e^{-}\to V;E^{\ominus }=-1.19V$
$\left(ii\right)F{e}^{3+}\left(aq\right)+3e^{-}\to Fe;E^{\ominus }=-0.04V$
$\left(iii\right)A{u}^{3+}\left(aq\right)+3e^{-}\to Au;E^{\ominus }=+1.40V$
$\left(iv\right)H{g}^{2+}\left(aq\right)+2e^{-}\to Hg;E^{\ominus }=+0.86V$

The pair(s) of metals that is/are oxidized by NO_{3}^{\ominus } in aqueous solution is/are
(IIT-JEE, 2010)

1. (a) Fe and Au
2. (b) Hg and Fe
3. (c) V and Hg
4. (d) Fe and V

Q. This question and the following one were a part of a linked comprehension in the (IIT-JEE, 2008) exam.

Redox reactions play a pivotal role in chemistry and biology. The values of standard redox potential $\left(E_{\ominus }\right)$ of two half cell reactions decided which way the reaction is expected to proceed. A simple example is a Daniell cell in which zinc goes into solution and copper gets deposited. Given below are a set of half cell reactions (acidic medium) along with their $E_{\ominus }$ (V with respect to normal hydrogen electrode) values. Using this data, obtain correct explanations for the follwing questions.
$I_2+2e^{-}\to 2I_{\ominus };E^{\ominus }=0.54$
$C{l}_2+2e^{-}\to 2C{I}_{\ominus };E^{\ominus }=1.36$
$M{n}^{3+}+e^{-}\to M{n}^{2+};E^{\ominus }=1.50$
$F{e}^{3+}+e^{-}\to F{e}^{2+};E^{\ominus }=0.77$
$O_2+4H^{⨁}+4e^{-}\to 2H_{2}I;E^{\ominus }=1.23$

Among the following, identify the correct statement.

1. Chloride ion is oxidized by $O_2.$
2. $F{e}^{2+}$ is oxidized by iodine.
3. Iodide ion is oxidized by chlorine.
4. $M{n}^{2+}$ is oxidized by chlorine.

Q. Given, $E_{C{r}^{(}3+)/Cr}^0=-0.74V;E_{Mn{O}_4^{-}/M{n}^{2+}}^0=1.51V$
$E_{C{r}_2{O}_7^{2-}/C{r}^{3+}}^0=1.33V;E_{Cl/C{l}^{-}}^0=1.36V$
Based on the data given above strongest oxidising agent will be

1. $C{l}^{-}$
2. $C{r}^{3+}$
3. $M{n}^{2+}$
4. $Mn{O}_4^{-}$

Q.

Here is a list of metals and their potentials. Pick the ones which are stronger oxidizing agents than hydrogen electrode. You can pick more than one.

1. Metal 'A' Reduction potential- 3.4

2. Metal 'B' Oxidation potential- 2.3

3. Metal 'C' Reduction potential- 1.4

4. Metal 'D' Oxidation potential- 0.9

Q.

Element that acts as ___ always has ___ position in the electrochemical series.

1. Cathode and Higher

2. Anode and Lower

3. Anode and Higher

4. Cathode and Lower

Q. The tribals relied on a government to solve their problems.

1. False
2. True