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24251.

The reaction CH_(3)CH=CH_(2)+HBr overset("peroxide") to mainly gives

Answer»

2-bromopropane
2,2-dibromopropane
1-bromopropane
1, 2-dibromopropane

Solution :In presence of organic peroxide, the addition, of HBr occur accroding to Khrashch EFFECT ( orperoxide effect or anit Markownif=koff's rule ) according to which hydrogen of HBr is ATTACHED to the CARBON to fr double bond that has less NUMBER of hydrogens.
`CH_(3)CH_(2)=HBr overset(R_(2) O_(2)) to CH_(3)CH_(2)CH_(2)Br`
Discussion
24252.

The reaction CH_(3)CH=CH_(2)+HBr overset (M.R) tomainly gives

Answer»

2-bromopropane
2,2-dibromoproane
1-bromopropane
1,2-dibromopropane

Solution :The hydrogen atom of HBr is attched to the carbon atom of double BOND that ALREADY hasmore HYDROGENS. The M. Rule is BASED on STABILITY of carbonium ion
`CH_(3)CH= CH_(2)+HBr overset(M.R) to underset("2-bromopropane")(CH_(3)CHBr CH_(3))`
Discussion
24253.

The reaction CH_(3)CHBrCH_(3)+KOH overset(alc) toCH_(2)=CH-CH_(3)+KBr+H_(2)Ois an example of

Answer»

ADDITION reaction<BR>Sibstitution reaction
elimination reaction
Rerrangement reaction

Solution :It is a `beta` elimination reaction. The nuclelophilic power of `OH^(-)` is supplemented by `C_(2)H_(5)O^(-)`. The nucleophile extract the `beta`- H atom as `H^(+)` . The simultaneous removal of bromine atom takes place as `Br^(-)`.
Discussion
24254.

The reaction CH_3CH_2OH underset"453 K"overset(95% H_2SO_4)to CH_2=CH_2+H_2O is an example of

Answer»

DEHYDRATION
DEHYDROGENATION
HYDRATION
DECARBOXYLATION

ANSWER :A
Discussion
24255.

The reaction CH_3CH_2Clunderset"2-Cu I"overset"1-Li"to overset(CH_3CH_2Cl)to n-butane is known as

Answer»

WURTZ SYNTHESIS
Corey-House synthesis
Kolbe synthesis
Friedel-Craft's synthesis

Solution :This is Corey-House synthesis of ALKANES
Discussion
24256.

The reaction, CH_3Br+OH^-rarr CH_3OH+Br obeys the mechanism:

Answer»

`S_(N^1)`
`S_(N^2)`
`S_(E^1)`
`S_(E^2)`

ANSWER :B
Discussion
24257.

The reaction (CH_3)_3C-Br overset(H_2O)rarr (CH_3)_3COH is:

Answer»

ELIMINATION REACTION
substitution reaction
free RADICAL reaction
ADDITION reaction

Answer :B
Discussion
24258.

The reaction (CH_3)_3C -Br overset(H_2O)(to) (CH_3)_3C - OH is

Answer»

ELIMINATION
substitution
free RADICAL
displacement

ANSWER :B
Discussion
24259.

The reaction CH_3-undersetunderset(CH_3)|oversetoverset(CH_3)|C-ONa+CH_3CH_2-Cl overset(-NaCl)to CH_3-undersetunderset(CH_3)|oversetoverset(CH_3)|C-O-CH_2-CH_3 is called .

Answer»

Williamsons Synthesis
Williamson CONTINOUS etherification process
Etard reaction
Gatterman-Koch reaction

Answer :A
Discussion
24260.

The reaction : (CH_(3))_(3)CBroverset(H_(2)O)(to)(CH_(3))_(3)COH is

Answer»

ELIMINATION REACTION
substitution reaction
FREE radical reaction
addition reaction.

ANSWER :B
Discussion
24261.

The reaction CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-Ona+ CH_(3)CH_(2)Cl underset(-NaCl)to CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-O-CH_(2)-CH_(3) is called :

Answer»

Williamson Synthesis
Williamson CONTINUOUS etherification process
Etard reaction
Gatterman - Koch reaction

Solution :Given reaction is an important laboratory METHOD for the PREPARATION of symmetrical and UNSYMMETRICAL ethers. In this method, an alkyl halide is allowed to react with sodium ALKOXIDE.
Discussion
24262.

The reaction, CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-ON a+CH_(3)CH_(2)Cl to CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-O-CH_(2)CH_(3) is called

Answer»

Etard reaction
Gattermann-Kock reaction
Williamson synthesis
Williamson CONTINUOUS etherification process

Answer :C
Discussion
24263.

The reaction CH_3-underset(CH_3)underset(|)overset(CH_3)overset(|)C-ONa+CH_3CH_2Clunderset(-NaCl)rarrCH_3-underset(CH_3)underset(|)overset(CH_3)overset(|)C-O-CH_2-CH_3 is called

Answer»

Williamson synthesis
Williamson continuous etherification process
Etard REACTION
GATTERMAN- KOCH reaction

Answer :A
Discussion
24264.

The reaction , CH_3 COOC_2 H_5 underset(4[H])overset(Na + C_2 H_5 OH)to C_2 H_5 OH + CH_3 CH_2 OH , is called

Answer»

Claisen REDUCTION
Claisen CONDENSATION
Bouveault-Blanc reduction
Tischenko reduction

ANSWER :C
Discussion
24265.

The reaction CH_(3) COCl+H_(2) underset("auinoline")overset(Pd-BaSO_(4))to CH_(3)-overset(O)overset(||)(C) - H+HCl is called

Answer»

Cannizzaro's REACTION
STEPHEN's reduction
HALOFORM REATION
ROSENMUND's reduction

Answer :D
Discussion
24266.

The reaction CH_(3) CH_(2) Br overset("Alc." KOH)underset(Delta)(to) CH_2 = CH_2+ H_2O, is a/an

Answer»

ADDITION REACTION
SUBSTITUTION reaction
elimination reaction
rearrangement reaction

Answer :C
Discussion
24267.

The reaction, CH_2=CH_2 + CH_3COCloverset(AlCl_3)rarr gives the product:

Answer»

`CH_3COCH_2CH_2Cl`
`CH_3` . `CH_2` . `CH_2Cl`
`CH_3COCH_2` . `CH_2COCH_2`
`ClCH_2CH_2Cl`

ANSWER :D
Discussion
24268.

The reaction CH_(2)=CH-CH_(3)+HB rtoCH_(3)CHBr-CH_(3) is

Answer»

NUCLEOPHILIC addition
electrophilic addition
electrophilic substitution
free RADICAL addition

Answer :B
Discussion
24269.

The reaction CH_2=CH-CH_3-HBr to CH_3CHBr -CH_3 is

Answer»

NUCLEOPHILIC REACTION
Electrophilic reaction
Electrophilic reaction
FREE RADICAL addition

Answer :B
Discussion
24270.

The reaction, CH_2 = CHCHO overset (HX)rarr give:

Answer»

`CH_3CHXCHO`
`CH_2XCH_2CHO`
`CH_2 = CHCH X_2`
NONE of the above

Answer :B
Discussion
24271.

The reaction : CH_2 =CH+2 + CO + H_2O (steam) overset(H_3 PO_4 ,Delta )toCH_3 CH_2COOH is known as Koch reaction/ Mendius reaction.

Answer»

SOLUTION :KOCH REACTION
Discussion
24272.

The reaction CH -= CH + HCN overset(Hg^(2+))rarr CH_(2) = CHCN is an example of :

Answer»

Electrophilic addition
nucleophilic addition
nucleophilic substitution
FREE radical addition

Answer :B
Discussion
24273.

The reaction can be classified as……………………. .

Answer»

dehydration
Williams on alcoholsynthesis
WILLIAMSON ether synthesis
DEHYDROGENATION of alcohols

Solution :Cyclic ALCOHOL `to` sodium cyclic ALKOXIDE `to` williamson ether synthesis
Discussion
24274.

The reaction C_(6)H_(6) + CO + HCI overset(AICI_(3)) to C_(6)H_(5)CHO+ HCIIs named after

Answer»

Intermediate is `H- overset(+) C to |\ | O`
GATTERMANN -Koch
Friedel - Crafts acylation
intermediate FORMED in situ

Answer :A,B,D
Discussion
24275.

The reaction, C_(6)H_(5)ONa+CO_(2)+H_(2)O to C_(6)H_(5)OH+NaHCO_(3) suggests that

Answer»

Phenol is a stronger acid than carbonic acid
Carbonic acid is a stronger acid than phenol
WATER is a stronger acid than phenol
NONE of the above

Answer :B
Discussion
24276.

The reaction, C_(6)H_(5)OHoverset(CH_(3)COCl)underset("Pyridine")rarrC_(6)H_(5)C CH_(3) is called

Answer»

Reimer - Tiemann reaction
Schotten - Baumann reaction
acetylation
benzoylation.

Solution :The reaction of PHENOL with ACETYL chloride to form PHENYL ACETATE is called acetylation.
Discussion
24277.

The reaction, C_(6)H_(5)CONH_(2)overset(Br_(2)+KOH)underset(Delta)toC_(6)H_(5)NH_(2) is called

Answer»

Gabriel PHTHALIMIDE reaction
Hofmann bromamide reaction
Hofmann ammonolysis of ALKYL halides
Hofmann MUSTARD OIL reaction.

Answer :B
Discussion
24278.

The reaction :C_(6)H_(5)COCl+H_(2)overset(Pd,BaSO_(4))toC_(6)H_(5)CHO+HClis called

Answer»

ROSENMUND's reaction
Sandmeyer's reaction
HVZ reaction
Cannizzaro 's reaction.

Answer :A
Discussion
24279.

The reaction C_6H_5CHO + CH_3CHO rarr C_6H_5CH = CHCHO + H_2O

Answer»

BENZOIN CONDENSATION
Claisen condensation
ALDOL condensation
Condensation

Answer :B
Discussion
24280.

The reaction C_6H_5CHO + CH_3 CHO overset(NaOH) rarr C_6H_5-CH=CH-CHO+H_2O is known as

Answer»

Cannizzaro REACTION
ALDOL condensation
Claisen - SCHMIDT condensation
Benzoin condensation

Answer :C
Discussion
24281.

The reaction, C_(6)H_(5) NO_(2) + KOH(s) overset("Heat")rarr o- and p-nitrophenol is an example of

Answer»

Nucleophilic substitution
Electrophilic substitution
Free radical substitution
Electrophilic addition

Solution :Since `-NO_(2)` group is deactivating, therefore, in nitrobenzene, the RING can undergo the ATTACK of a NUCLEOPHILE at ortho and para positions to give nucleophilic substitution reaction.
Discussion
24282.

The reaction C_(6)H_(5)CH=CHCHO with NaBH_(4) yields

Answer»

`C_(6)H_(5)CH_(2)CH_(2)OH`
`C_(6)H_(5)CH=CHCH_(2)OH`
`C_(6)H_(5)CH_(2)CH_(2)CHO`
`C_(6)H_(5)CHOHCH_(3)`

ANSWER :B
Discussion
24283.

The reaction C_6H_6+ CH_3Cl underset("(anhydrous)")overset(AlCl_3)(rarr) HCl + C_6H_5CH_3 is

Answer»

FRIEDEL - CRAFTS ALKYLATION
ADDITION reaction
Friedel - Crafts ACYLATION
Friedel Crafts benzoylation

Answer :A
Discussion
24284.

The reaction C_(6) H_(5) CHO + CH_(3) CHO overset("dil.NaOH")(rarr) C_(6) H_(5)CH = CHCHO is called

Answer»

Benzoin CONDENSATION
Claisen condensation
Perkin reaction
Cannizzaro's reaction

Solution :`C_(6) H_(5) CHO + CH_(3) CHO OVERSET("DIL NaOH")(rarr) C_(6) H_(5) - CH = CH - CHO`
It is called claisen condensation.
Discussion
24285.

The reaction C_6 H_5 OHunderset( "Pyridine") overset( CH_3COCl) to C_6H_6OCOCH_3is called

Answer»

Reimer- Tiemann reaction
SCHOTTEN- Baumann reaction
Acetylation
BENZOYLATION

ANSWER :C
Discussion
24286.

The reaction C_(2)H_(5)ONa+C_(2)H_(5)I to C_(2)H_(5)OC_(2)H_(5)+NaI is known as

Answer»

Kolbe's synthesis
Wurtz's synthesis
Williamson's synthesis
GRIGNARD's synthesis

Solution :Williamson's synthesis is a METHOD for the PREPARATION of simple and mixed ethers. It involves the heating of alkyl halides with sodium or POTASSIUM ALKOXIDES.
`RONa+R'X rarr ROR'+NaX`
Discussion
24287.

The reaction : C_(2)H_(5)OH+SOCl overset("Pyridine")(to)C_(2)H_(5)Cl+SO_(2)+HCl is know as

Answer»

Kharasch effect
Williamson's synthesis
Darzen's procedure
Hunsdiecker reaction

Solution :Alkyl HALIDES are be prepared by TREATING alcohol with `SOCl_(2)`
`CH_(3)CH_(2)OH+SOCl_(2) to CH_(3)CH_(2)Cl+SO_(2)+HCL`
This reaction isknown as Darzen's procedure.
Note : `SOBr_(2) and SOI_(2)` are not used in this reaction because `SOBr_(2)`is less stable and `SOI_(2)` does not exist.
Discussion
24288.

The reaction, C_(2)H_(5)+KOHoverset(aq.)toC_(2)H_(5)OH+KBr is,

Answer»

a ELECTROPHILIC
a NUCLEOPHILIC
FREE radical
redox

Answer :B
Discussion
24289.

The reaction, C_2H_5I + KOHrarr C_2H_5OH + KI is called :

Answer»

HYDROXYLATION substitution
Electrophilic substitution
Nucleophilic substitution
Dehydroiodination

Answer :C
Discussion
24290.

The reactionC_2H_4 +Br_2 rarr CH_2Br-CH_2Br is an example of :

Answer»

Substitution
Oxidation
Addition
Double decomposition

Answer :C
Discussion
24291.

The reaction by which the salicylaldehyde is prepared when phenol is heated with CHCl_(3) and alcoholic KOH is known as .... .

Answer»

FRIEDEL CRAFT reaction
Reimer-Tiemann reaction
Grignard reaction
None of these

Solution :
Discussion
24292.

The reaction between water and [Fe(H_(2)O)_(6)]^(3+) gives _________ and H_(3)O^(+) ions and the solution formed is __________ is nature.

Answer»

Solution :`[Fe(H_(2)O)_(5)(OH)]^(2+)`, ACIDIC
Discussion
24293.

The reaction between phosphorus (P_(4)) and hydrogen (H_(2)) can result in the formation of phosphine (PH_(3)) as shown : P_(4)(s)+6H_(2)(g)hArr 4PH_(3)(g) The graph shows the change in concentration of hydrogen for this reaction in which the system was distrubed after four hours. Whichof the following could explain the change in hydrogen concentration at time = 4 hours?

Answer»

The volume on the REACTION VESSEL was decreased
A catalyst was added
The PRESSURE on the reaction MIXTURE was decreased
More phosphorus was added

Answer :A
Discussion
24294.

The reaction between primary amine, chloroform and alcoholic caustic potash is called

Answer»

WURTZ REACTION
Frankland reaction
CANNIZZARO's reaction
CARBYLAMINE reaction

SOLUTION :Carbylamine Reaction.
Discussion
24295.

The reaction between NO_((g))andBr_(2(g)) follows reaction mechanism as given below. NO_((g))+Br_(2(g))hArrNOBr_(2(g)) (Fast) NOBr_(2(g))+NO_((g))rarr2NOBr_((g)) (Slow) the order of reaction with respect to NO_((g)) is …...

Answer»

3
2
1
0

Answer :B
Discussion
24296.

The reaction between phenol and benzoyl chloride ishte present of sodium hydroxide is named as _______ reaction.

Answer»

Cannizaro
Reimer- Tiemann
Kolbe's
Schotten-Baumann

ANSWER :D
Discussion
24297.

The reaction between NH_(4)Cl solution and alkaline Nessler's reagent forms -

Answer»

`(HgNH_(2)CL+Hg)`

`K_(2)[O-Hg-NH_(2)Cl]I`
None of the above

ANSWER :B
Discussion
24298.

The reaction between NH_(2)^(-) and N_(2)O gives

Answer»

NO
`N_(3)^(-)`
`N_(2)O_(5)`
`NH_(2)NH_(2)`

Solution :`underset("AMIDE ion")(NH_(2)^(-)) + N_(2)O rarr underset("Azide ion")(N_(3)^(-) + H_(2)O`
Discussion
24299.

The reaction between N_(2) and H_(2) to from ammonia has K_(c)6xx10^(-2) at the temperaturee 500^(@)C. The numerical value of K_(p) for this reaction is

Answer»

<P>`1.5xx10^(-5)`
`1.5xx10^(5)`
`1.5xx10^(-6)`
`1.5xx10^(6)`

Solution :`K_(p)=K_(c)(RT)^(Deltan),Deltan=2-4=-2`
`K_(p)=6xx10^(-2)XX(0.0812xx773)^(-2)`
`K_(p)=(6xx10^(-2))/((0.0812xx773)^(2))=1.5xx10^(-5)`
Discussion
24300.

The reaction between H_(2)(g) and O_(2)(g) is highly feasible yet allowing the gases to stand at room temperature in the same vessel does not lead to the formation of water. Explain.

Answer»

Solution :Activation ENERGY for this REACTION is very high. THEREFORE the reaction does not TAKE PLACE.
Discussion