SN2 Reaction Mechanism

Q. Dinitrogen and dihydrogen react with each other to produce ammonia according to the following chemical equation:
$N_2\left(g\right)+3H_2\left(g\right)\to 2N{H}_3\left(g\right)$

$A$: Calculate the mass of ammonia produced if $2.00\times {10}^{3}g$ dinitrogen reacts with $1.00\times {10}^{3}g$ of dihydrogen.

$B$: Will any of the two reactants remain unreacted?

$C$: If yes, which one and what would be its mass?

Q.

Which compound in each of the following pairs will react faster in $S_{N}2$reaction with $\overline{O}H$ ?

$C{H}_{3}BrorC{H}_{3}I$

$(C{H}_3{)}_{3}CClorC{H}_{3}Cl$

Which compound in each of the following pairs will react faster in $S{N}_2$reaction with $\overline{O}H$ ?

Q.

The order of reactivity of haloalkenes is RI>RCl>RBr

Why

Q.

What is a protic solvent?

Q.

Which of the following molecules can act as a nucleophile and an electrophile?

1. ${\mathrm{CH}}_3{\mathrm{NH}}_2$

2. ${\mathrm{CH}}_3\mathrm{Cl}$

3. ${\mathrm{CH}}_3\mathrm{CN}$

4. ${\mathrm{CH}}_3\mathrm{OH}$

Q. ntWhat is the mechanism of Birnbaum simonini reaction?n

Q.

Write a short note on inorganic benzene.

Q.

The stability of the following alkali metal chlorides follows the order:

1. NaCl > KCl > LiCl > CsCl

2. KCl > CsCl > NaCl > LiCl

3. LiCl > KCl > NaCl > CsCl

4. CsCl > KCl > NaCl > LiCl

Q. nta chemical reaction A TO B rate of reaction doubleswhen concof A incresed 8 times.order of reaction w.r.t AIS?n

Q.

Why is Bromine used when dissolved in ${\mathrm{CCl}}_4$ or water?

Q.

Define aprotic solvents.

Q. In the reaction,
2Al + 6HCl = 2Al^3+ + 6Cl^- + 3H2
(a) 11.2L H2 at STP is produced for every mole of HCl consumed.
(b) 6L HCl is consumed for every 3L H2 produced.
(c) 33.6L H2 is produced regardless of temperature and pressure for every mole Al that reacts.
(d) 67.2L H2 at STP is produced for every mole Al that reacts.

Q. When $Ph-OH$ reacts with $C_2{H}_{5}I$ with anhydrous $C_2{H}_{5}OH$ as the solvent in the presence of ethoxide ions, what is the product of this reaction?

1. $Ph-Me$
2. $Ph-O-Me$
3. $Ph-O-Et$
4. $Ph-Et$

Q. Hio4 converts primary, secondary , and tertiary alcohol in what

Q.

The correct pair of ambident nucleophiles are (i)$\mathrm{AgCN}/\mathrm{KCN}$ (ii) $\mathrm{RCOOAg}/\mathrm{RCOOK}$ (iii)${\mathrm{AgNO}}_2/{\mathrm{KNO}}_2$ (iv) $\mathrm{AgI}/\mathrm{KI}$

1. (i) and (iii) only

2. (ii) only

3. (ii) and (iii) only

4. (i) only

Q. Which of the following haloalkanes is most reactive

1. 2–bromopropane
2. 1-bromopropane
3. 2–chloropropane
4. 1–chloropropane

Q.

Write the equation of the reaction of hydrogen iodide with:

I-propoxypropane

Methoxybenzene

Benzyl ethyl ether

Q.

Complete and balance the equation

$\mathrm{KOH}+{\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4\to$

Q. Propane nitrile may be prepared by heating

1. Propyl alcohol with KCN
2. Ethyl alcohol with KCN
3. Ethyl chloride with KCN
4. propyl chloride with KCN

Q. $(C{H}_3{)}_{3}COH$ on heating with copper at 573K gives:

1. $C{H}_3-C=C{H}_2|C{H}_3$
2. $C{H}_{3}C{H}_{2}COOH,C{H}_{3}COOH$
3. $C{H}_{3}COC{H}_3,C{O}_2$
4. $C{H}_{3}COC{H}_3,C{H}_{3}COOH$

Q. Will benzaldehyde do not have alpha hydrogen?

Q. Why in some element whose coordination no is 6 and ligand is NH3 hybridization is d2sp3 and sometimes sp3d2

Q.

The back - side attack on 2 - bromobutane by methoxide $\left(C{H}_3{O}^{\ominus }\right)$ gives the product shown below. Which Fischer projection represents 2 - bromobutane used as the reactant in this reaction?

1. 
   

2. 
   

3. 
   

4. 
   

Q.

Identify A and B in the following reaction

Q. $PC{l}_5\left(g\right)\to PC{l}_3\left(g\right)+C{l}_2\left(g\right)$

In the above first order reaction the concentration of $PC{l}_5$ reduces from initial concentration $50mol{L}^{-1}to10mol{L}^{-1}in120\text{minutes at}300K$. The rate constant for the reaction at $300K$ is $x\times {10}^{-2}mi{n}^{-1}$. The value of $x$ is _______________.

$Given:log5=0.6989$

Q.

$\left(\mathrm{R}\right)-2-\mathrm{Iodobutane}$ is treated with $\mathrm{NaI}$in acetone and allowed to stand for a long time. The product eventually formed is:

1. $(\pm )-2-\mathrm{iodobutane}$

2. $\left(\mathrm{R}\right)-2-\mathrm{iodobutane}$

3. $(\pm )-1,2-\mathrm{diiodobutane}$

4. $\left(\mathrm{S}\right)-2-\mathrm{iodobutane}$

Q. Why are aryl halides less reactive than alkyl halides towards nucleophilic substitution reactions ?

Q. which of the following molecule stabilizes by removal of electron 1)C2 2)O2 3)N2 4)H2

Q. Predict the order of reactivity of the following compounds in $S_{N}1$ and $S_{N}2$ reactions :
The four isomeric bromobutanes
$C_6{H}_{5}C{H}_{2}Br,C_6{H}_{5}CH\left(C_6{H}_5\right)Br,C_6{H}_{5}CH\left(C{H}_3\right)Br,C_6{H}_{5}C\left(C{H}_3\right)\left(C_6{H}_5\right)Br$

Q. Which of the following compound has electrovalent linkage?

1. $C{H}_{3}Cl$
2. $NaCl$
3. $C{H}_{3}OH$
4. $C{H}_{3}COOH$