Oxidation of Alcohols

Q. Which of the following alcohols will form an aldehyde or a ketone as a product on oxidation with $H^{+}/K_{2}C{r}_2{O}_7$.

1. $1^{\circ }$ alcohol
2. $2^{\circ }$ alcohol
3. $3^{\circ }$ alcohol
4. Both $1^{\circ }$ and $2^{\circ }$ alcohol

Q.

n-Propyl alcohol and isopropyl alcohol can be chemically distinguished by:

1. Phosphorus pentachloride

2. Reduction

3. Oxidation with potassium dichromate

4. ozonolysis

Q. Which of the following metal alkoxides is used in oxidation as well as reduction reaction?

1. Aluminium alkoxides
2. Sodium alkoxides
3. Magnesium alkoxides
4. Zinc alkoxides

Q. Which of the following compounds undergo periodic oxidation?

1. 
2. 
3. 
4. All the above

Q.

n-Propyl alcohol and isopropyl alcohol can be chemically distinguished by:

1. Phosphorus pentachloride

2. Reduction

3. Oxidation with potassium dichromate

4. ozonolysis

Q. In this given reaction

$HOC{H}_2-C{H}_{2}OH\stackrel{\left[X\right]}{\to }HCHO+HCHO$
[X] will be:

$\left(a\right)lmoleofHI{O}_4\left(b\right)2molesofHI{O}_{4}j$
$\left(c\right)conc.HN{O}_3\left(d\right)Mn{O}_2$

1. $a$
2. $b$
3. $c$
4. $d$

Q. The oxidation cleavage of 1, 2-diol by a periodic acid or periodic salt to give corresponding carbonyls is known as Malaprade oxidation.

Vicinal diols can also be oxidized to form aldehydes and ketones by lead tetraacetate. This oxidation cleavage is analogous to malaprade oxidation and is known as Criegee oxidation.

When Halohydrin is treated with $A{g}_{2}O$ or Silver salt, it gives pinacol-pinacolone type rearrangement called semi-pinacol rearrangement.
List-I contains reactions and List-II contains products that can be formed.



Which of the following options has the correct combination considering reaction in List-I and their product(s) in List-II?

1. $\left(II\right)\to \left(P\right),\left(T\right)and\left(IV\right)\to \left(S\right)$
2. $\left(II\right)\to \left(U\right)and\left(IV\right)\to \left(S\right)$
3. $\left(II\right)\to \left(P\right),\left(U\right)and\left(IV\right)\to \left(Q\right),\left(R\right),\left(S\right)$
4. $\left(II\right)\to \left(P\right)\left(U\right)and\left(IV\right)\to \left(R\right)$

Q. Arrange the following glycols in order of decreasing rate of oxidation with periodic acid.

1. I > II > III
2. II > III > I
3. III > II > I
4. All will be oxidized at the same rate.

Q.

For oxidizing alcohols, several oxidants – each with a multivalent central atom as the active species – can be used. When Dess-Martin periodinane (DMP), with I as the multivalent atom is used, how many bonds to oxygen atoms does each central multivalent atom have just before and immediately after the oxidation respectively?

1. 7 – before, 5 – after

2. 6 – before, 4 – after

3. 5 – before, 3 – after

4. 4 – before, 2 – after

Q. Reagent(s) used in the conversion of $R-C{H}_2-OH\to R-CHO:$

1. $PCC/C{H}_{2}C{l}_2$
2. $Cu,{300}^{\circ }\text{C}$
3. $Cr{O}_3$
4. All of the above

Q.

The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one is:

1. Acidic permanganate

2. Acidic dichromate

3. Chromic anhydride in glacial acetic acid

4. Pyridinium chlorochromate

Q. The oxidation cleavage of 1, 2-diol by a periodic acid or periodic salt to give corresponding carbonyls is known as Malaprade oxidation.

Vicinal diols can also be oxidized to form aldehydes and ketones by lead tetraacetate. This oxidation cleavage is analogous to malaprade oxidation and is known as Criegee oxidation.

When Halohydrin is treated with $A{g}_{2}O$ or Silver salt, it gives pinacol-pinacolone type rearrangement called semi-pinacol rearrangement.
List-I contains reactions and List-II contains products that can be formed.



Which of the following options has the correct combination considering reaction in List-I and their product(s) in List-II?

1. $\left(II\right)\to \left(P\right),\left(T\right)and\left(IV\right)\to \left(S\right)$
2. $\left(II\right)\to \left(U\right)and\left(IV\right)\to \left(S\right)$
3. $\left(II\right)\to \left(P\right),\left(U\right)and\left(IV\right)\to \left(Q\right),\left(R\right),\left(S\right)$
4. $\left(II\right)\to \left(P\right)\left(U\right)and\left(IV\right)\to \left(R\right)$

Q.

For oxidizing alcohols, several oxidants – each with a multivalent central atom as the active species – can be used. When $NaOCl$, with Cl as the multivalent atom is used, how many bonds to oxygen atoms does each central multivalent atom have just before and immediately after the oxidation respectively?

1. 1 – before, 1 – after

2. 2 – before, 0 – after

3. 2 – before, 1 – after

4. 1 – before, 0 – after

Q. For the given reaction

$\left(a\right)C{H}_2=CH-\stackrel{OH}{\stackrel{|}{CH}}-C{H}_3\stackrel{\left[X\right]}{\to }C{H}_2=CH-\stackrel{O}{\stackrel{||}{C}}-C{H}_3$
[X] will be:
$\left(a\right)C{l}_2/NaOH\left(b\right)Fentonreagent$
(c) Aluminium tertbutoxide $\left(b\right)K_{2}C{r}_2{O}_7/H^{@}/△$

1. $a$
2. $b$
3. $c$
4. $d$