Synthesis of Ethers

Q. Best method for preparation of given compound by williamson's ether synthesis is

1. 
2. 
3. 
4. 

Q.

Write the reactions of Williamson synthesis of 2-ethoxy-3-methylpentane starting from ethanol and 3-methylpentan-2-ol.

Q. A grignard reagent can not be made by reacting magnesium with

1. Ethyl iodide
2. Methyl amine
3. Butyl bromide
4. Propyl chloride

Q. The oxidation of $S{O}_2$ by $O_2$ to $S{O}_3$ is an exothermic reaction according to equation $2S{O}_2\left(g\right)+O_2\left(g\right)\rightleftharpoons 2S{O}_3\left(g\right)+\text{Heat}$. The yield of $S{O}_3$ will be maximum if

1. temperature is increased and pressure is kept constant
2. temperature is reduced and pressure is increased
3. both temperature and pressure are increased
4. both temperature and pressure are reduced

Q. why is o-nitrophenol a major product in nitration of phenol ? whereas in case of halogenation para form a major product.why?

Q. What are some ways you would suggest to learn different chemical equations easily?
they are pretty confusing to me and i am atressig about it.
How to learn them! I dont want to use the "ratta" method. So a way hich i can use to understand equations. Specially those equations which have catalysts in it.
a same equation can have different products just by changing the catalyst. So any way to remember this also?
Please give an explained answer.

Q. Which of the following will not give Hofmann-Bromamide reaction ?

1. 
2. 
3. 
4. 

Q.

Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert -butyl ether can't be prepared by this method.Explain.

Q. Which of the following is an example of symmetrical or simple ether?

1. $C_6{H}_5-O-C{H}_2-C{H}_3$
2. $C{H}_3-O-C{H}_2-C{H}_3$
3. $C{H}_3-C{H}_2-O-C{H}_2-C{H}_2-C{H}_3$
4. 

Q. Given below are two statements:

Statement I: The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.

Statement II: The nuceophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.

In the light of the above statements, choose the most appropriate answer from the options given below:

1. Statement I is false but statement II is true
2. Statement I is true but statement II is false
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false

Q.

Preparation of ethers by acid dehydration of secondary or tertiary alcohols is not a suitable method. Give reason.

Q. Given:From the following compound(s), which on reaction with $HN{O}_3$ will give the product having degree of rotation, $[\alpha {]}_D=-{52.7}^{\circ }$ is/are:

1. 
2. 
3. 
4. 

Q. Nucleophilicity of halides in non polar, aprotic polar and polar protic solvents ?

Q. The complete hydrolysis of RCN under acidic conditions gives:

1. RCOOH
2. $RCON{H}_2$
3. $RC{H}_{2}N{H}_2$
4. $RN{H}_2$
   

Q.

Write the names of reagents and equations for the preparation of the following ether by Williamson's synthesis.
1-propoxypropane

Ethoxybenzene

2-methoxy-2-methylpropane

1-methoxyethane

Q. The conversion of ethyl bromide to ethyl iodide using sodium iodide and dry acetone, this reaction is known as:

1. Swartz reaction
2. Finkelstein reaction
3. Halogenation
4. Wurtz reaction

Q.

What is the difference between ${\mathrm{S}}_{\mathrm{N}}1$ and ${\mathrm{E}}_1$?

Q. Account for the following
Ko2 is paramagnetic
LiI iodide is more soluble than KI in ethanol

Q. Ether is obtained from ethyl alcohol in presence of $H_{2}S{O}_4$ at ?

1. $113K$
2. $443K$
3. $413K$
4. $213K$

Q.

Illustrate the examples the limitations of Williamson's synthesis for the preparation of certain types of ethers.

Q.

An organic compound A(C₂H₆O) reacts with Na to give compound B with evolution of H₂gas. A is heated with conc H₂SO₄ at 413K to give compound C. Compound A is :

1. Ethanol

2. Anisole

3. Methoxy methane

4. Ethanoic acid

Q. Anisole is the product obtained from phenol by the reaction known as:

1. Coupling
2. Etherification
3. Oxidation
4. Esterification

Q. Why bimolecular dehydration not suitable for preparation of ethyl methyl ether.

Q.

The reaction of sodium ethoxide with ethyl iodide to form diethyl ether is termed

1. Electrophilic substitution

2. Nucleophilic substitution

3. Electrophilic addition

4. Nucleophilic addition

Q. Which compound gives reaction with 2, 4-dinitrophenyl hydrazine?

1. Formaldehyde
2. Acetone
3. Acetaldehyde
4. All of these

Q. What is the product formed when ethyl alcohol reacts with diazomethane in the presence of fluoroboric acid $\left(HB{F}_4\right)$ as a catalyst.

1. Ethoxy benzene
2. 1-Propoxy propane
3. Ethyl methyl Ether
4. 1-Ethoxy-2, 2-dimethyl propane

Q.

Give reason:

Ammonium nitrate is not used for the production of ammonia.

Q. Which of the following are converted to an aromatic species on the loss of hydride ion?

1. I, II, III
2. I, III, IV
3. I, III, V
4. III, IV, V

Q. What would be the major product of following reaction?

1. 
2. 
3. 
4. 

Q. List-I contains reactions and List-II contains major products.

1. P-1, 5; Q-2; R-3; S-4
2. P-1, 4; Q-2; R-4; S-3
3. P-1, 4; Q-1, 2;R-3, 4; S-4
4. P-4, 5; Q-4; R-4; S-3, 4