Preparation of Alkanes with Grignard Reagent

Q.

What happens when

(i) n-butyl chloride is treated with alcoholic KOH,

(ii) bromobenzene is treated with Mg in the presence of dry ether,

(iii) chlorobenzene is subjected to hydrolysis,

(iv) ethyl chloride is treated with aqueous KOH,

(v) methyl bromide is treated with sodium in the presence of dry ether,

(vi) methyl chloride is treated with KCN.

Q. Which of the following is not a disproportionation reaction:

1. $P_4+NaOH\to Na{H}_{2}P{O}_2+P{H}_3$
2. $Ba{C}_2+N_2\to Ba\left(C{N}_2\right)$
3. $H{g}_2{I}_2\to Hg{I}_2+Hg$
4. $Ca(OH{)}_2+C{l}_2\to CaOC{l}_2+H_{2}O$

Q. The diazonium salt of which of the following compounds will form a coloured dye on reaction with $\beta$ - Naphthol in NaOH ?

1. 
2. 
3. 
4. 

Q. $C{H}_{3}MgI$ will give methane with

1. $C_2{H}_{5}OH$
2. $C{H}_3-C{H}_2-N{H}_2$
3. $C{H}_3-CO-C{H}_3$
4. All of these

Q. Phenols react with ferric chloride solution to give:

1. Blue colouration
2. Purple colouration
3. Green Colouration
4. All of these

Q. Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

1. $C{H}_{3}C{H}_{2}OH$
2. $C{H}_{3}CHO$
3. $C{H}_{3}C{O}_{2}C{H}_2$
4. $C{H}_{3}COC{H}_3$

Q. Iodine reacts with concentrated $HN{O}_3$ to yield Y along with other products. The oxidation state of iodine in Y, is

1. 5
2. 3
3. 1
4. 7

Q. Grignard reagent is not prepared in aqueous medium but prepared; in ether medium because the reagent

1. Is highly reactive in ether
2. Reacts with water
3. Is insoluble in water
4. Becomes inactive in water

Q. Dihydrogen $\left(H_2\right)$ on reaction with metal ions and metal oxides:

1. Gets oxidised.
2. Gets reduced.
3. Does not react.
4. Can get oxidised or reduced.

Q. CH3CHO +\:HCHO \overset{conc . KOH}{→?

Q. The conversion of primary aromatic amines into diazonium salts is known as :

1. diazotisation
2. displacement
3. acylation
4. alkylation

Q.

$P_4+3NaOH+3H_{2}O⟶3Na\left(H_{2}P{O}_2\right)+P{H}_3$ is an example of:

1. Disproportionation reaction

2. Neutralisation reaction

3. Double decomposition reaction

4. Pyrolytic reaction

Q. The total number of monochloro alkanes (including stereoisomer) formed in the above reaction is :

1. $7$
2. $8$
3. $9$
4. $10$

Q. What is the change in oxidation number of carbon in the following reaction?
$CO\left(g\right)+\frac{1}{2}{O}_2\left(g\right)\to C{O}_2\left(g\right)$

1. $0\text{to}+4$
2. $-4\text{to}+4$
3. $+2\text{to}+4$
4. $-2\text{to}+4$

Q. $P$ in $H_{3}P{O}_4,H_{3}P{O}_3,HP{O}_3,P_2{O}_5$ and $P{H}_3$.

1. $+4,+2,+3,+5,-2$
2. $+5,+3,+5,+5,-3$
3. $+5,+3,+4,+5,-3$
4. None of the above

Q. 29. The reagent used to distinguish divinyl ether and chloromethyl vinyl ether would be ?

Q. Phenol to cumene

Q. The most suitable reagent for the followiing conversion, is:

1. $Na/liquidN{H}_3$

2. $H{g}^{2+}/H^{+},H_{2}O$

3. $Zn/HCl$

4. $H_2,Pd/C,quinoline$

Q. For the reaction
$I^{\ominus }+Cl{O}_3^{\ominus }+H_{2}S{O}_4\to C{l}^{\ominus }+HS{O}_4^{-}+I_2$
The correct statement(s) in the balanced equation is/ are:
(IIT-JEE-Advanced 2014)

1. Stoichiometric coefficient of $HS{O}_4^{-}$ is 6.
2. Iodide is oxidized.
3. Sulphur is reduced.
4. $H_{2}O$ is one of the products.

Q. What happens when we react methylbenzene with Br/hv , and also in presence of Br2/FeBr3 ? Would it be the same possibilities if it were chlorine ?

Q. Consider the reaction sequence $C_6{H}_{5}MgBr\stackrel{C{O}_2}{\to }\left(A\right)\underset{H_{2}O}{\overset{H^{+}}{\to }}\left(B\right)\stackrel{C_6{H}_{5}MgBr}{\to }\left(C\right)$
The product 'C' may be:

1. An alcohol
2. An aromatic hydrocarbon
3. An aromatic aldehyde
4. An aromatic carboxylic acid

Q. The reaction below is known as
$C_2{H}_{5}N{H}_2+C{S}_2+HgC{l}_2\stackrel{\Delta }{\to }{C}_2{H}_{5}N=C=S+HgS+2HCl$

1. Hoffmann Bromamide degradation
2. Hoffmann mustard oil reaction
3. Oxymercurvation - demercurvation reaction
4. None of these

Q. Ethanol can be oxidized stepwise. What is the first stable intermediate product when ethanol is oxidized with a mild oxidation agent?

1. $C{O}_2$
2. $C{H}_{3}COOH$
3. $C{H}_{3}CHO$
4. $C{H}_{3}OC{H}_3$

Q. $P_4+3NaOH+3H_{2}O⟶3Na\left(H_{2}P{O}_2\right)+P{H}_3$ is an example ofreaction.

1. Disproportionation
2. Neutralisation
3. Double decomposition
4. Pyrolytic

Q. The given reaction
$2FeC{l}_3+SnC{l}_2\to 2FeC{l}_2+SnC{l}_4$
Is an example of:

1. Third order reaction
2. First order reaction
3. Second order reaction
4. None of these

Q. Which of the following cannot form $C{H}_{3}COOH$ from $C_2{H}_{5}OH$?
A) PCC
B) PDC
C) $K_{2}C{r}_2{O}_7/H^{+}$
D)$KMnO4/H^{+}$

1. A and B only
2. C and D only
3. Only A
4. All A, B, C and D

Q. A given nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by $HN{O}_2$ to give an unstable compound B. B, on treatment with phenol, forms a beautiful coloured compound C with the molecular formula $C_{12}{H}_{10}{N}_{2}O$. The structure of compound 'A' isRead more on Sarthaks.com - https://www.sarthaks.com/231600/given-nitrogen-containing-aromatic-compound-reacts-with-followed-hno2-unstable-compound

1. 
2. 
3. 
4. 

Q. A given nitrogen - containing aromatic compound $A$ reacts with $Sn/HCl,$ followed by $HN{O}_2$ to give an unstable compund $B.B,$ on treatment with phenol, forms a beautiful coloured compund $C$ with the molecular formula $C_{12}{H}_{10}{N}_{2}O.$ The structure of compound $A$ is :

1. 
2. 
3. 
4. 

Q. What is the name of B?
[1 Mark]

1. Benzene
2. Phenol
3. Aniline
4. Chlorobenzene

Q. The aldol condensation of acetaldehyde results in the formation of:

1. $C{H}_{3}CO-CH\left(OH\right)-C{H}_3-CHO$
2. $C{H}_3-CH\left(OH\right)-C{H}_2-CHO$
3. $C{H}_{3}C{H}_{2}OH+C{H}_{3}COOH$
4. $C{H}_{3}C{H}_2-CH\left(OH\right)-CHO$