94420 + Interview Questions in Chemistry in Class 12 Page 1822 InterviewSolution

91051.	(A) Caro's acis has S atom in + 6 oxidation state (R ) Caro's acid contains the peroxo o _(2) ^(2-) group
Answer» Both (A) and (R ) are TRUE and (R ) is the CORRECT EXPLANATION of (A) Both (A) and (R ) are true and (R ) is not the correct explanation of (A) (A) is true but (R ) is false Both (A) and (R )are false Answer :A

Discussion

91052.	A Carnot engine, whose temperature of the source is 400K receives 200 calories of heat at this temperature and rejects 150 calaroies of heat to the sink. What is the temperature of the sink? Also, calculate the efficiency of the engine
Answer» ANSWER :`(300 K, 25%)`

Discussion

91053.	A Carnot engine, having an efficiency of eta=1//10 as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is
Answer» 99 J 90 J 1 J 100 J Answer :B

Discussion

91054.	Carnallite is an example of
Answer» Both (A) and (R) are TRUE and (R) is the correct EXPLANATION of (A) Both (A) and (R) are true and (R) is not the correct explanationof (A) (A) is true but (R) is false Both (A) and (R) are false Answer :D

Discussion

91055.	A Carnot engine has an efficiency of 40% . If the temperature of the reservoir is 280 K, what is the temperature of the source ?
Answer» ANSWER :(466.6 K)

Discussion

91056.	(A) Carboxylic acids (R-overset(O)overset(\|\|)C-OH) have a carbonyl group but it does not give the test of carbonyl group. Due to resonance double, the bond character of group is greatly reduced.
Answer» If both (A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A). If both (A) and (R) are correct but (R) is not correct explanation of (A). If (A) is correct but (R) is INCORRECT. If (A) is incorrect but (R) is correct. ANSWER :A

Discussion

91057.	(A) Carboxylic acids contain a carbonyl group but do not give characteristic reactions of the carbonyl group. (R) Double bond character of C = O bond in carboxylic acids is greatly reduced due to resonance, as compared to that in aldehydes and ketones.
Answer» Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A) Both (A) and (R) are true and (R) is not the correct explanation of (A) (A) is true but (R) is false Both (A) and (R) are false Answer :A

Discussion

91058.	A carboxylic acid X is treated with bromine(1 mole) in the presence of a little phosphouus. The isolated product is heated with a strong base and then oxidized with O_(3)//Zn-H_(2)O. one of the two oxidation products is a netural compound which reacts with hydroxylamine to give an oxime, X can be
Answer» `CH_(3)CH_(2)CH(CH_(3))CH_(2)CO_(2)H` `CH_(3)CH_(2)CH(CH_(3))CO_(2)H` `CH_(3)CH_(2)CO_(2)H` `(CH_(3))CHCH_(2)CO_(2)H` Answer :A

Discussion

91059.	A carboxylic acid isconverted into its anhybride using
Answer» thionly chloride SULPHUR chloride sulphuric PHOSPHORUS pentoxide Solution :Carboxylic ACID is coverted into ISTS anhybride by using phosphorus pentaoxide.

Discussion

91060.	A carboxylic acid of the formula, C_(3)H_(5)O_(2)Br is optically active. What is its structure?
Answer» Solution :`CH_(3)-OVERSET(Br)overset(\|)(.^(**)C)H-COOH`2-Bromopropanoic ACID.

Discussion

91061.	A carboxylic acid can best be converted into acid chloride by using
Answer» `PCl_5` `SOCl_2` HCL ClCOCOCl Solution :Use of `SOCl_2` and CICOCOCI forms gaseous by products which can be easily removed, GIVING better yield of RCOCI. Further, oxalyl chIoride is particularly easy to use becasue any excess of it can be easily evaporated due to its low b.p. (`62^@C`) `R-oversetOoverset(\|\|)C-OH +Cl - OVERSET(O)overset"\|\|"C-overset(O)overset(\|\|)C-Cl to R-overset(O)overset(\|\|)C-Cl + HCl uarr + CO uarr + CO_2 uarr`

Discussion

91062.	A carbonyl compound with molecular weight 86, does not reduce Fehling's solution but forms crystalline bisulphite derivative and gives iodoform test. The possible compound can be
Answer» 2-pentanone and 3-pentanone 2-pentanone and 3-METHYL-2-butanone 2-pentanone and pentanal 3-pentanone and 3-methyl-2-butanone Solution :Both 2-pentanone and 3-methyl-2-butanone being methyl KETONES form crystalline bisulphite derivative and GIVE IODOFORM test.

Discussion

91063.	A carbonyl compound with molecular weight 86, does not reduce Fehling's solution, but form crystalline bisulphite derivatives and gives iodoform test. The possible compound can be
Answer» Pentan -2 - one and pentan - 3- one Pentan -2-one andpentan -3- one Pentanal PENT -3- one ANSWER :B

Discussion

91064.	A carbonyl compound with molecular mass 86, does not reduce Fehling's solution but forms crystalline bisulphite derivative and gives iodoform test. The possible compound is
Answer» 2-pentanone and 3- pentanone 2-pentanone and 3-methyl-2-butanone 2-pentanone and pentanal 3-pentanone and 3-methyl-2-butanone. Solution :SINCE the compound gives IODOFORM test, it is a methyl ketone. The isomers listed in OPTION (B) RESPOND to this test.

Discussion

91065.	A carbonyl compound reacts with hydrogen cyanide to form a cyanohydrin which on hydrolysis forms a racemic mixture of alpha-hydroxy acids. The carbonyl compound is
Answer» formaldehyde acetaldehyde acetone diethyl ketone Solution :Acetaldehyde CYANOHYDRIN `CH_(3) overset()(C)H(OH)CN and `lactic ACID `(CH_(3)overset()(C)HOHCOOH)` which it gives on hydrolysis contain a chiral carbon and hence exist as racemic MIXTURES. All other compounds are symmetrical and hence their cyanohydrins and the corresponding `alpha`-hydroxy acids are not optically active because they do not contain a chiral carbon.

Discussion

91066.	A carbonyl compound P,which gives positive iodoform test, undergoes reaction with MemgBr followed by dehydration to give an Olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S. The structure of the products Q and R, respectively, are
Answer» ANSWER :A

Discussion

91067.	A carbonyl compound P,which gives positive iodoform test, undergoes reaction with MemgBr followed by dehydration to give an Olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S. The structure of the product S is
Answer» ANSWER :B

Discussion

91068.	A carbonyl compound P,which gives positive iodoform test, undergoes reaction with MemgBr followed by dehydration to give an Olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S. The structure of the carbonyl compound P is
Answer» ANSWER :B

Discussion

91069.	A carbonyl compound P which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R,which undergoes intramolecular aldol reaction to give predominantly S. Poverset((i)MeMgBr)undersetunderset((iii)H_(2)SO_(4),"heat")((ii)H^(+),H_(2)O)rarrQoverset(O_(3)//Sn^(-),H_(2)O)rarrRoverset(OH^(-))underset("heat")rarrS. The structures of the products Q and R, respectively, are
Answer» ANSWER :B

Discussion

91070.	A carbonyl compound P which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R,which undergoes intramolecular aldol reaction to give predominantly S. Poverset((i)MeMgBr)undersetunderset((iii)H_(2)SO_(4),"heat")((ii)H^(+),H_(2)O)rarrQoverset(O_(3)//Sn^(-),H_(2)O)rarrRoverset(OH^(-))underset("heat")rarrS. The structure of the product S, is
Answer» ANSWER :B

Discussion

91071.	A carbonyl compound (P) with the formula C_(2)H_(4)O reacts with CH_(3)MgX followed by hydrolysis to form an alcohol (Q). Name the alcohol Q.
Answer» SOLUTION :PROPAN -2-ol

Discussion

91072.	A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R which undergoes intramolecular aldol reaction to give predominantly S. P underset(underset(3.H_(2)SO_(4),Delta)(2. H^(+), H_(2)O))overset(1."MeMgBr")(rarr) "Q " underset(2.Zn,H_(2)O)overset(1.O_(3))(rarr)" R "underset(2.Delta)overset(1. OH^(-))(rarr)S
Answer» ANSWER :A

Discussion

91073.	A carbonyl compound P which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R,which undergoes intramolecular aldol reaction to give predominantly S. Poverset((i)MeMgBr)undersetunderset((iii)H_(2)SO_(4),"heat")((ii)H^(+),H_(2)O)rarrQoverset(O_(3)//Sn^(-),H_(2)O)rarrRoverset(OH^(-))underset("heat")rarrS. The structure of the carbonyl compound P is
Answer» ANSWER :A::B

Discussion

91074.	A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergo intramolecular aldol reaction to give predominantly S. Poverset(1.MeMgBr)undersetunderset(3.H_(2)SO_(4),Delta)(2.H^(+),H_(2)O)rarrQ overset(1.O_(3))underset(2.Zn,H_(2)O)rarr Roverset(1.OH^(+))underset(2.Delta)rarr S The structure of the product S is
Answer» SOLUTION :

Discussion

91075.	A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergo intramolecular aldol reaction to give predominantly S. Poverset(1.MeMgBr)undersetunderset(3.H_(2)SO_(4),Delta)(2.H^(+),H_(2)O)rarrQ overset(1.O_(3))underset(2.Zn,H_(2)O)rarr Roverset(1.OH^(+))underset(2.Delta)rarr S The structure of the products Q and R, respectively, are
Answer» SOLUTION :

Discussion

91076.	A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergo intramolecular aldol reaction to give predominantly S. Poverset(1.MeMgBr)undersetunderset(3.H_(2)SO_(4),Delta)(2.H^(+),H_(2)O)rarrQ overset(1.O_(3))underset(2.Zn,H_(2)O)rarr Roverset(1.OH^(+))underset(2.Delta)rarr S The structure of the carbonyl compound P is
Answer» SOLUTION :

Discussion

91077.	A carbonyl compound gives a positive lodoform test but but does not reduce Tollen's reagent or Fehling's solution. It forms a cyanohydrin with HCN, which on hydrolysis gives a hydroxy acid with a methyl side chain. The compound :-
Answer» Acetaldehyde Propionaldehude Acetone and ACETIC ACID Crotonaldehyde Answer :C

Discussion

91078.	A carbonyl compound 'A'' react with hydrogen cyanide to give cyanohydrin 'B' which on acid hydrolysis gives optically active alpha - hydroxy propanoic acid 'C' Compounds A, B, C respectively are ,
Answer» `HCHO, H - UNDERSET(CN) underset(\|) overset(H)overset(\|) (C) - OH,H - underset(COOH) underset(\|) overset(H) overset(\|) (C) - OH ` `CH_(3) - CHO,CH_(3) - underset(CN) underset(\|) overset(H) overset(\|) (C) - OH,CH_(3) - underset(COOH) underset(\|) overset(H) overset(\|) (C) - OH` `C_(2)H_(5) - CHO,C_(2)H_(5) - underset(CN) underset(\|) overset(H) overset(\|) (C) - OH,C_(2) H_(5) - underset(COOH) underset(\|) overset(H) overset(\|) (C) - OH` `CH_(3) - overset(CH_(3))overset(\|) (C) = O ,CH_(3) - underset(CN) underset(\|) overset(CH_(3))overset(\|) (C) - OH ,CH_(3) - underset(COOH) underset(\|) overset(CH_(3)) overset(\|) (C) - OH` Answer :B

Discussion

91079.	A carbonyl compound A having molecular formula C_5H_10 Oforms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.
Answer» Solution :(i) `UNDERSET("(Pentan - 2 - ONE)")(CH_3-CH_2-CH_2-undersetoverset(\|\|)(O)(C ) - CH_3) overset(NaHSO_3)(to) underset("(White crystalline precipitate)")(CH_3-CH_2-CH_2 - undersetoverset(\|)(OSO_2Na)oversetunderset(\|)(OH) ) ` (ii) Pentan - 2 - one gives positive iodoform test, but it does not reduce Fehling.s solution. (iii) Hence carbonyl COMPOUND A having molecular formula `C_5H_10 O`is pentan - 2 - one. `underset("2-pentanone")(CH_3-CH_2 - CH_2 = undersetoverset(\|\|)(O)(C ) - CH_3)`

Discussion

91080.	A carbonyl compound A having molecular formula C_(5)H_(10)O forms crystalline precipitate with sodium bisulpite and gives positive iodoform test. A does not reduce Fehling solution. Identify A.
Answer» Solution :An CARBONYL caompound having MOLECULAR formula `C_(5)H_(10)O` giving positive iodoform test and does not reduce Fehling solution is 2 - pentanone. `underset(2-"pentanone")(CH_(3)-CH_(2)-OVERSET((A))(CH_(2)-underset(O)underset(\|\|)(C)-CH_(3)))+NaHSO_(3)tounderset("Pentanone bisulphite")(CH_(3)-CH_(2)-CH_(2)-underset(OH)underset(\|)overset(SO_(3)Na)overset(\|)(C)-CH_(3)` `therefore` Compound (A) is 2 - pentanone.

Discussion

91081.	A carbonyl compoun 'A' reacts with hydrogen cyanide to form a cyanohydrin 'B' which gives an optically alpha hydroxy and 'C' .'C' gives positive iodoform test. A,B and C respectively are given by the set:
Answer» ANSWER :B

Discussion

91082.	A carbonyl compound can be prepared by hydration of acetylene. It reacts with ammonia to form (X) and with hydroxylamine to form (Y). It undergoes Wolff-Kishner reduction to form Z. X, Y and Z are
Answer» Acetaldimine ACETALDOXIME and ethane Diacetone amine, acetoxime and PROPANE Acetaldoxime , SEMICARBAZONE and propane Aldol, hydrazone and alcohol. ANSWER :A

Discussion

91083.	A carbonium ion is formed when a covalent bond between two atoms in an organic compound undergoes:
Answer» Homolysis Heterolysis Cracking Pryrolysis Answer :B

Discussion

91084.	A carbonyl compound reacts with HCN to form a cyanohydrin which on hydrolysis forms a racemic mixture of hydroxy acids. The compounds is
Answer» acetaldehyde acetone diethyl ketone Formaldehyde Answer :A

Discussion

91085.	Identify correct statement/s from the following: (a) Carbon is found in the native form as graphite. (b) Coal contains large quantities of carbon ( c ) Clay is important source for carbon. (d) Carbon exists in many allotropic forms.
Answer»

Discussion

91086.	A carboncompoundwhichis solublein conc. HClsolution , on treatmentwith f sodiumnitrite give anitrogengas .
Answer» `C_(2)H_(5)NH_(2)` `CH_(3)NH_(2)` `CH_(3)CH_(2)CH_(2)NH_(2)` all of these Solution :All primary aminegives `N_(2)`GAS with`NaNO_(2) + HCl`.

Discussion

91087.	A carbon compound contains 12.8% of carbon, 2.1% of hydrogen and 85.1% bromine . The molecule mass of compound is 187.9. calculate the molecular formula of the compound (Atomic mass H=1.008,C=12,Br=79.9)
Answer» `CH_(3)BR` `CH_(2)Br_(2)` `C_(2)H_(4)Br_(2)` `C_(2)H_(3)Br_(3)` Solution :Number of 'C' ATOMS `=(%)/(100)xx("Molecular MASS")/("Atomic mass")` `(12.8)/(100)xx(187.9)/(12)=2` Number of 'H' atoms `=(%)/(100)xx("Molecular mass")/("Atomic mass")` `=(2.1)/(100)xx(187.9)/(1.008)=4` Number of 'Br' atoms `=(%)/(100)xx("Molecular mass")/("Atomic mass")` `=(85.1)/(100)xx(187.9)/(79.9)=2` Molecular FORMULA `=C_(2)H_(4)Br_(2)`.

Discussion

91088.	A carbon compound contains 12.8% of carbon, 2.1% of hydrogen and 85.1% of bromince. The molecular weight of the compound is 187.9. Calculatte the molecular formula of the compound. (Atomic weight of H +1.008, C = 12.0 and Br = 79. 9))
Answer» `CH_(3)Br` `CH_(2)Br_(2)l` `C_(2)H_(4)Br_(2)` `C_(2)H_(3)Br_(3)` Answer :C

Discussion

91089.	A carbon compound containing only carbon and oxygen has an approximate molecular mass of 290. On analysis. It is found to contain 50% by mass of each element. What is the molecular formula of the compound?
Answer» Solution : The empirical formula `=C_(4)O_(3)` Empirical formula mass `=(4xx12)+(3xx16)=96` MOLECULAR mass =290 `n=("Mol.mass")/("Emp.mass")=(290)/(96)=3` APPROXIMATELY Molecvular formula `=NXX` empirical formula `=3xxC_(4)O_(3)=C_(12)O_(9)`

Discussion

91090.	A carbohydrate X having molecular mass 180 g mol^(-1)has one primary alcoholic group and four secondary alcoholic group . It reacts with acetic anhydride to form pentaacetate . The molecular mass of pentaacetate formed is …………...........
Answer» 180 210 390 42 Answer :C

Discussion

91091.	A carbohydrate which cannot be hydrolyzed to simpler compounds is called:
Answer» Monosaccharide Polysaccharide Disaccharide Trisaccharide Answer :A

Discussion

91092.	A carbohydrate which cannot be hydrolysed to simple compounds is called ...............
Answer» SOLUTION :MONOSACCHARIDE

Discussion

91093.	A carbohydrate that cannot be hydrolysed to simpler forms is called
Answer» disaccharide monosaccharide polysaccharide trisaccharide SOLUTION :MONOSACCHARIDES cannot be HYDROLYSED to SIMPLE FORMS.

Discussion

91094.	A carbohydrates in soluble in water is
Answer» glucose fructose Cellulose sucrose Answer :C

Discussion

91095.	A cannot engine operates between temperature T and 400 K(T>400K). If efficiency of engine is 25%, the temperature T is:
Answer» 400 K 500 K 533.3 K 600 K Answer :C

Discussion

91096.	(A) : Cannizzaro reaction is a disproportionation reaction. (R) : Cannizzaro reaction is performed using acid .
Answer» Both A & R are true, R is the correct EXPLANATION of A Both A & R are true, R is not correct explanation of A A is true, R is FALSE A is false, R is true ANSWER :C

Discussion

91097.	A can be prepared by
Answer» `Ph-UNDERSET(O)underset(\|\|)C-Cl+NH_(3)RARR` `Ph-underset(O)underset(\|\|)C-Cl+NH_(3)OVERSET(POCl_(3))underset(DELTA)rarr` Answer :B

Discussion

91098.	'A' can be
Answer» `PbCl_(2)` `SbCl_(3)` `SnCl_(2)` `RbCl` ANSWER :D

Discussion

91099.	(a). Calculate triangleG_(f)^(@) of the following raection: Ag^(+)(aq)+Cl^(-)toAgCl(s) given triangleG_(f)^(@)(AgCl)=-109kJ//"mole",triangleG_(f)^(@)(Cl^(-))=-129kJ//"mole",triangleG_(f)^(@)(Ag^(+))=77kJ//"mole" Represent the above reaction in form of a cell. Calculate E^(@) of the cell. find log_(10)K_(sp) of AgCl at 25^(@)C (b). 6.539xx10^(-2)g of metallic Zn (atomic mass =65.39amu) was added to 100 mL of saturated solution of AgCl. Calculate log_(1)([Zn^(2+)])/([Ag^(+)]^(2)) at equilibrium at 25^(@)C given that Ag^(+)+e^(-)toAg""E^(@)=0.80V Zn^(2+)+2e^(-)toZn""E^(@)=-0.76V Also find how many moles of Ag will be formed (take (114)/(193)=0.59,(1.56)/(0.059)=26.44)
Answer» Solution :(a). `triangleG_(R)^(@)=-109+129-77=-57kJ//mol` cell representation `Ag\|AgCl\|\|Cl^(-)\|Ag^(+)\|Ag`. `-1xx96500xxE^(@)=057xx10^(3)` `E^(@)=0.59"volt"` `0=0.59-(0.059)/(1)log((1)/(K_(SP)))` `logK_(SP)=-10`. (b). `ZntoZn^(2+)+2e^(-),""0.76"volt"` `underline(2Ag^(+)+2e^(-)to2Ag,""0.80"volt")` `underline(Zn+2Ag^(+)toZn^(2+)+2Ag,) ""E_(cell)^(@)=1.56"volt"` `n_(2n)=(6.539)/(65.39)=10^(-3)mol""[Ag^(+)]=sqrt(K_(sp))=10^(-5)M` `0=1.56-(0.059)/(2)logK""n_(Ag^(+))=10^(-5)xx0.1=10^(-6)M`. `n_(Ag)=10^(-6)molimplieslogK=52.8`

Discussion

91100.	A calculated amount of I_(2) is used in the preparation of hypo by Spring's reaction because:
Answer» Hypo OXIDISES `I_(2)` if EXCEES `I_(2)` is PRESENT Excees `I_(2)` oxidises hypo Excees hypo decreases the solubility of `I_(2)` in water Hypo and `I_(2)` form an addition compound Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

(A) Caro's acis has S atom in + 6 oxidation state (R ) Caro's acid contains the peroxo o _(2) ^(2-) group

A Carnot engine, whose temperature of the source is 400K receives 200 calories of heat at this temperature and rejects 150 calaroies of heat to the sink. What is the temperature of the sink? Also, calculate the efficiency of the engine

A Carnot engine, having an efficiency of eta=1//10 as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is

Carnallite is an example of

A Carnot engine has an efficiency of 40% . If the temperature of the reservoir is 280 K, what is the temperature of the source ?

(A) Carboxylic acids (R-overset(O)overset(||)C-OH) have a carbonyl group but it does not give the test of carbonyl group. Due to resonance double, the bond character of group is greatly reduced.

(A) Carboxylic acids contain a carbonyl group but do not give characteristic reactions of the carbonyl group. (R) Double bond character of C = O bond in carboxylic acids is greatly reduced due to resonance, as compared to that in aldehydes and ketones.

A carboxylic acid X is treated with bromine(1 mole) in the presence of a little phosphouus. The isolated product is heated with a strong base and then oxidized with O_(3)//Zn-H_(2)O. one of the two oxidation products is a netural compound which reacts with hydroxylamine to give an oxime, X can be

A carboxylic acid isconverted into its anhybride using

A carboxylic acid of the formula, C_(3)H_(5)O_(2)Br is optically active. What is its structure?

A carboxylic acid can best be converted into acid chloride by using

A carbonyl compound with molecular weight 86, does not reduce Fehling's solution but forms crystalline bisulphite derivative and gives iodoform test. The possible compound can be

A carbonyl compound with molecular weight 86, does not reduce Fehling's solution, but form crystalline bisulphite derivatives and gives iodoform test. The possible compound can be

A carbonyl compound with molecular mass 86, does not reduce Fehling's solution but forms crystalline bisulphite derivative and gives iodoform test. The possible compound is

A carbonyl compound reacts with hydrogen cyanide to form a cyanohydrin which on hydrolysis forms a racemic mixture of alpha-hydroxy acids. The carbonyl compound is

A carbonyl compound P,which gives positive iodoform test, undergoes reaction with MemgBr followed by dehydration to give an Olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S. The structure of the product S is

A carbonyl compound P,which gives positive iodoform test, undergoes reaction with MemgBr followed by dehydration to give an Olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S. The structure of the carbonyl compound P is

A carbonyl compound (P) with the formula C_(2)H_(4)O reacts with CH_(3)MgX followed by hydrolysis to form an alcohol (Q). Name the alcohol Q.

A carbonyl compound gives a positive lodoform test but but does not reduce Tollen's reagent or Fehling's solution. It forms a cyanohydrin with HCN, which on hydrolysis gives a hydroxy acid with a methyl side chain. The compound :-

A carbonyl compound 'A'' react with hydrogen cyanide to give cyanohydrin 'B' which on acid hydrolysis gives optically active alpha - hydroxy propanoic acid 'C' Compounds A, B, C respectively are ,

A carbonyl compound A having molecular formula C_5H_10 Oforms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.

A carbonyl compound A having molecular formula C_(5)H_(10)O forms crystalline precipitate with sodium bisulpite and gives positive iodoform test. A does not reduce Fehling solution. Identify A.

A carbonyl compoun 'A' reacts with hydrogen cyanide to form a cyanohydrin 'B' which gives an optically alpha hydroxy and 'C' .'C' gives positive iodoform test. A,B and C respectively are given by the set:

A carbonyl compound can be prepared by hydration of acetylene. It reacts with ammonia to form (X) and with hydroxylamine to form (Y). It undergoes Wolff-Kishner reduction to form Z. X, Y and Z are

A carbonium ion is formed when a covalent bond between two atoms in an organic compound undergoes:

A carbonyl compound reacts with HCN to form a cyanohydrin which on hydrolysis forms a racemic mixture of hydroxy acids. The compounds is

Identify correct statement/s from the following: (a) Carbon is found in the native form as graphite. (b) Coal contains large quantities of carbon ( c ) Clay is important source for carbon. (d) Carbon exists in many allotropic forms.

A carboncompoundwhichis solublein conc. HClsolution , on treatmentwith f sodiumnitrite give anitrogengas .

A carbon compound contains 12.8% of carbon, 2.1% of hydrogen and 85.1% bromine . The molecule mass of compound is 187.9. calculate the molecular formula of the compound (Atomic mass H=1.008,C=12,Br=79.9)

A carbon compound contains 12.8% of carbon, 2.1% of hydrogen and 85.1% of bromince. The molecular weight of the compound is 187.9. Calculatte the molecular formula of the compound. (Atomic weight of H +1.008, C = 12.0 and Br = 79. 9))

A carbon compound containing only carbon and oxygen has an approximate molecular mass of 290. On analysis. It is found to contain 50% by mass of each element. What is the molecular formula of the compound?

A carbohydrate X having molecular mass 180 g mol^(-1)has one primary alcoholic group and four secondary alcoholic group . It reacts with acetic anhydride to form pentaacetate . The molecular mass of pentaacetate formed is …………...........

A carbohydrate which cannot be hydrolyzed to simpler compounds is called:

A carbohydrate which cannot be hydrolysed to simple compounds is called ...............

A carbohydrate that cannot be hydrolysed to simpler forms is called

A carbohydrates in soluble in water is

A cannot engine operates between temperature T and 400 K(T>400K). If efficiency of engine is 25%, the temperature T is:

(A) : Cannizzaro reaction is a disproportionation reaction. (R) : Cannizzaro reaction is performed using acid .

A can be prepared by

'A' can be

A calculated amount of I_(2) is used in the preparation of hypo by Spring's reaction because: