Hydroboration

Q. The major product formed in the following reaction

1. 
2. 
3. 
4. 

Q. Which of the following methods can not be used for the preparation of aldehydes and ketones?

1. Oxidation of alcohols
2. Dehydrogenation of alcohol
3. Oxidation by $HI{O}_4$
4. Dehydration of alkynes

Q. Which alkene gives a meso compound upon reaction with $B{r}_2$ in $C{H}_{2}C{l}_2$?

1. 
2. 
3. 
4. 

Q. What will be the product of above reaction?

1. 
2. 
3. 
4. 

Q. Which of the following reagent is used for the following reaction?

$C{H}_{3}C{H}_{2}C{H}_3\stackrel{?}{\to }C{H}_{3}C{H}_{2}CHO$

1. Maganese acetate
2. Molybdenum oxide
3. Potassium permanganate
4. Copper at high temperature and pressure

Q. Identify the starting material of the following reaction:

1. 
2. 
3. 
4. 

Q. What will be the product of the given reaction?

1. 
2. 
3. 
4. 

Q.
Identify product X:

1. 
2. 
3. 
4. 

Q. Which of the following is not required for the conversion of trialkyl borane to an alcohol?

1. Diborane
2. Water
3. Sodium hydroxide
4. Hydrogen peroxide

Q. In the reaction sequence
The product 'B' is

1. 
2. 
3. 
4. 

Q. $C{H}_{3}Br\underset{\text{dry ether}}{\overset{Na}{\to }}X\underset{△}{\overset{(C{H}_{3}COO{)}_{2}Mn}{\to }}Y$

Predict 'X' and 'Y'

1. X- $HCHO$
   Y- $C{H}_{3}COOH$
2. X- $C{H}_4$
   Y- $HCHO$
3. X- $C{H}_3-C{H}_3$
   Y- $C{H}_{3}COOH$
4. X- $C{H}_3-C{H}_3$
   Y- $HCOOH$

Q. Find the product of the above reaction

1. 
2. 
3. 
4. 

Q. Product 'Z' is:

1. Optically active $1^o$ alcohol
2. Optically inactive $1^o$ alcohol
3. Optically active $2^o$ alcohol
4. Optically active $3^o$ alcohol

Q. The Cannizzaro reaction is not given by

1. Trimethylacetaldehye
2. Acetaldehyde
3. Benzaldehyde
4. Formaldehyde

Q. Cannizzaro reaction will be given by:

1. (i), (ii), (iii)
2. (i) and (ii)
3. (ii) and (iii)
4. (i) and (iv)

Q.
The product $A$ is:

1. 
2. 
3. 
4. 

Q. The major product of the following reaction is

1. 
2. 
3. 
4. 

Q.

1. 

2. 

3. 

4. 

Q. Hydroboration-oxidation of $C{H}_{3}CH=C{H}_2$ gives:

1. $C{H}_{3}C{H}_{2}C{H}_{2}OH$
2. $C{H}_{3}CH\left(OH\right)C{H}_3$
3. $C{H}_{3}CH\left(OH\right)C{H}_{2}OH$
4. $C{H}_{3}COC{H}_3$

Q. In the reaction given below.


Reagent X could be

1. $PC{l}_5$
2. $\text{conc.}{H}_{2}S{O}_4$
3. $SOC{l}_2$
4. $HCl$

Q. $\text{Trans-2-butene}+B{r}_2\stackrel{CC{l}_4}{\to }$

1. 
2. 
3. 
4. 

Q.
Product $A$ is:

1. 
2. 
3. 
4. 

Q.

The product of following reaction is

1. 
2. 
3. 
4. 

Q.

Which of the following compound would yield trialkyl borane as shown below when treated with $B{H}_3$ and THF ?

1. 2 - Methyl but-1-ene

2. 2 - Methyl but-2-ene

3. 3 - Methyl but-1-ene

4. 3 - Methyl but-1-ene

Q. Assume general laboratory reagents are available at your disposal and that multiple steps may be needed:
Which of the following sequence(s) helps convert styrene to 2-phenylacetaldehyde?

1. Hybroboration oxidation; followed by Oxidation by PCC
2. 1. $B{r}_2/C{H}_{2}C{l}_2$; 2. $Et{O}^{-}/EtOH$ 3. $Si{a}_{2}BH$, followed by $H_2{O}_2,O{H}^{-}$
3. Neither a nor b
4. Both a and b

Q. The hydrides of boron are called :

1. Boron hydrogen compounds
2. Hydrogen borides
3. Boranes
4. Hydroboric acids

Q. An optically active halide when allowed to react with $C{N}^{-}$ gives a racemic mixture. The halide is most likely to be

1. Primary
2. secondary
3. tertiary
4. none of the above

Q.

Propene $C{H}_3-CH=C{H}_2$ can be converted into 1-propanol by oxidation. Which set of reagents among the following is ideal to affect the conversion ?

1. $\frac{Os{O}_4}{C{H}_{2}C{l}_2}$

2. alkaline $KMn{O}_4$

3. $B_2{H}_6$ and alkaline $H_2{O}_2$

4. $O_3/Zn$ dust

Q. Methyl magnesium bromide $\to$ 2-Methylpropan-2-ol.

Q.

The product of following reaction is

1. 
2. 
3. 
4.