Oxidising and Reducing Nature

Q. 34. What is the stability order for the following carbanions----- A) benzylic carbanion B) phenyl carbanion C) allylic carbanion D) vinyl carbanion

Q. Which one of the following oxide is neutral in nature?

1. $CO$
2. $SnO$
3. $PbO$
4. $GeO$

Q. the s†an dard reduction potential value of three metallic cations x, y and z are 0.52, -3.303 and -1.18 v respectively the order of reducing power of the corresponding metals is

Q. Which halide is least stable and has doubtful existence ?

1. $C{I}_4$
2. $Ge{I}_4$
3. $Sn{I}_4$
4. $Pb{I}_4$

Q.

Read the following and select one the correct answer.

Statement I: $P{b}^{4+}$ compounds are stronger oxidizing agents than $S{n}^{2+}$ compounds

Statement II: The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to inert pair effect.

1. Statement I and Statement II are both correct. Statement II correctly explains Statement I

2. Statement I and Statement II are both correct. Statement II does not explain Statement I

3. Statement II is correct and Statement I is wrong

4. Statement I is correct and Statement II is wrong

Q. Arrange according to their stability order 1. A 3 degree carbonation 2. A 3 degree carboanion 3. A 3 degree free radical

Q. Why $PbC{l}_4$ exist but $Pb{I}_4$ doesn't ?

1. because $I^{-}$ get oxidised to $I_2$
2. because $I^{-}$ is a strong reducing agent
3. because $I_2$ is a gas
4. because $I^{-}$ is a strong oxidising agent

Q.

It is because of the inability of $n{s}^2$ electrons of the valence shell to participate in bonding that

1. $S{n}^{2+}$ is oxidizing while $P{b}^{2+}$ is reducing

2. $S{n}^{2+}$ and $P{b}^{2+}$ are both oxidizing and reducing

3. $S{n}^{4+}$ is reducing while $P{b}^{4+}$is oxidizing

4. $S{n}^{2+}$ is reducing while $P{b}^{4+}$is oxidizing

Q. Ge(II) compounds are powerful reducing agents whereas Pb(IV) compounds are strong oxidants, because

1. $\text{Pb is more electropositive than Ge}$
2. $\text{Ionization potential of lead is less than that of Ge}$
3. $\text{Ionic radii of}P{b}^{2+}\text{and}P{b}^{4+}\text{are larger than those of}G{e}^{2+}\text{and}G{e}^{4+}$
4. $\text{Lead is heavier than Germanium}$

Q. Which of the following is/are not oxidising agents?

Q. Why $PbC{l}_4$ exist but $Pb{I}_4$ doesn't ?

1. because $I^{-}$ get oxidised to $I_2$
2. because $I^{-}$ is a strong reducing agent
3. because $I_2$ is a gas
4. because $I^{-}$ is a strong oxidising agent

Q. Which of the following reason is correct about the statement "All members of Group IA have similar reactivity"?

1. They have the same number of protons
2. They have valence electrons with the same quantum numbers
3. They have the same number of neutrons
4. They have the same number of electrons
5. They have similar outer-shell electron configurations

Q. $$\begin{gathered} Moststablecarbanionis \\ \left(1\right)CH\equiv C^{⊝} \\ \left(2\right)H_{2}C=\stackrel{⊝}{C}H \\ \left(3\right)C{H}_3-\stackrel{\stackrel{C{H}_3}{|}}{\underset{\underset{C{H}_3}{|}}{C}}-\stackrel{⊝}{C}{H}_2 \\ \left(4\right)C{H}_3-\stackrel{\stackrel{C{H}_3}{|}}{\underset{\underset{C{H}_3}{|}}{C}}=\stackrel{⊝}{C}H \end{gathered}$$