Halogenation of Alpha Carbon

Q.

Addition of HBr to propene yields 2-bromopropane, while in the presence of benzoyl peroxide, the same reaction yields 1-bromopropane. Explain and give mechanism.

Q. The correct order of reactivity of the given chlorides with acetate in acetic acid is :

1. 
2. 
3. 
4. 

Q.

Write the structure of the major organic product in each of the following reactions:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

(vii)

(viii)

Q.

Which is more reactive benzaldehyde and acetaldehyde?

Q. 1)Calculate n -factor for Al2O3 for the following reaction. Al(excess) +O2 Al2O3 2)If x gram of Al2O3 is formed , y gram of Al is consumed in the reaction .Find realtion between x and y.( Use concept of gram equivalent).

Q. Which of the following will react with water?

1. $CHC{l}_3$
2. $C{l}_{3}C.CHO$
3. $CC{l}_4$
4. $ClC{H}_{2}C{H}_{2}Cl$

Q.

1. True
2. False

Q. Ethylene glycol on oxidation with periodic acid gives

1. Glycollic acid
2. Glycol
3. Oxalic acid
4. Formaldehyde

Q.

What are the three types of Substitution?

Q.

$C{H}_{3}CHO$ and $C_6{H}_{5}C{H}_{2}CHO$ can be distinguished by:

1. Benedict's test

2. Iodoform test

3. Tollen's reagent test

4. Fehling's solution test

Q. 4-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives:

1. 
2. 
3. 
4. 

Q.

Which of the following does not show iodoform test?

1. Ethyl methyl ketone

2. Isopropyl alcohol

3. $3$- Methyl– $2$– butanone

4. Isobutyl alcohol

Q. The structure of the starting compound P used in the reaction given below is:

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1. 
2. 
3. 
4. 

Q. The equation M+(x+y)NH3-->[M(NH3)x]⁺+[e(NH3)y]^- in this equation M is a alkali metal what is the meaning of x and y in the equation. I

Q. Identify the correct combination of true (T) and false (F) of the given three statements.
STATEMENT-1: Acetophenone gives aldol condensation.
STATEMENT-2: Benzaldehyde is more reactive than acetaldehyde towards nucleophilic addition.
STATEMENT-3: Benzophenone has $\alpha -$Hydrogens.

1. TTT
2. FFF
3. TFF
4. TFT

Q. What is the increasing order of reactivity of the following in an E2 reaction with ethanolic KOH solution?

1. I < II < III < IV
2. I < II < IV < III
3. III < I < II < IV
4. IV < III < II < I

Q. In the below given reaction:
A and B are respectively are:

1. Base and Base
2. Base and Acid
3. Acid and Acid
4. Acid and Base

Q. The compound that will not give Iodoform on treatment with alkali and iodine is :

1. acetone
2. ethanol
3. diethyl ketone
4. isopropyl alcohol

Q. Which of the following statement is correct?

1. Formaldehyde on heating with $I_2$ and alkali gives yellow ppt.
2. Ethanol is the only primary alcohol which gives haloform reaction.
3. All secondary alcohol gives haloform reaction.
4. All ketones gives haloform reaction.

Q. what is basic bessemer process? give associated reactions in details.

Q. Which of the following(s) will undergo acid-base reaction with Grignard reagent ?

1. $R^{\prime }N{H}_2$
2. $R-OH$
3. $R-C{O}_{2}H$
4. $H_{2}S$

Q. Which pair of products would result from the acid cleavage of phenyl propyl ether with HBr at an elevated temperature?

1. Phenol and 1-propanol
2. Bromobenzene and 1-propanol
3. Bromobenzene and 1-bromopropane
   
4. Phenol and 1-bromopropane

Q. Methanol and ethanol are distinguished by-

1. Treating with Schiff's reagent
2. Treating with Lucas reagent
3. Heating with iodine and alkali
4. Treating with $Cr{O}_3$ in dil. $H_{2}S{O}_4$

Q.
After Lucas test at room temperature, if mixture remains clear than which alcohol is confirmed?

1. Isopropyl alcohol
2. n-butyl alcohol
3. Tertiary butyl alcohol
4. None of the above

Q.

$C{H}_{3}COC{H}_{2}Cl\stackrel{O{H}^{-},C{l}_2}{\to }$ Product P is

1. $ClC{H}_{2}COC{H}_{2}Cl$

2. $C{H}_{3}COCHC{l}_2$

3. $Bothaandb$

4. $ClC{H}_{2}COOH+C{H}_{3}Cl$

Q. Identify the correct combination of true (T) and false (F) of the given three statements.
STATEMENT-1: Acetophenone gives aldol condensation.
STATEMENT-2: Benzaldehyde is more reactive than acetaldehyde towards nucleophilic addition.
STATEMENT-3: Benzophenone has $\alpha -$Hydrogens.

1. TTT
2. FFF
3. TFF
4. TFT

Q.

Aldehydes and ketones have

Q. A compound A has molecular formula $C_{2}C{l}_{3}OH$. It reduces Fehling’s solution and on oxidation gives a monocarboxylic acid B. A is obtained by action of $C{l}_2$ on ethyl alcohol. A is:

1. CHCl₃
2. CH₃Cl
3. chloro acetic acid
4. chloral

Q. Reaction of Chlorobenzene with $C{H}_{3}Cl$ in presence of $AlC{l}_3$ gives:

1. Toulene
2. Only o-chloro toulene
3. m-chloro toulene
4. Mixture of o- and p-chlorotoulene

Q. Assertion :$p$-methyl benzyl carbocation (I) is more stable than benzyl carbocation (II). Reason: Heterovalent or no bond resonance.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct