This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 84901. |
Aldehydes are oxidised to acids by |
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Answer» potassium dicromate Therefore all of these options are correct. |
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| 84902. |
Addition of water to ethyne in the presence of H_2SO_4 and HgSO_4 gives |
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Answer» Acetone |
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| 84903. |
Addition of water to alkynes occurs in acidic medium and in the presence of Hg^(2+) ions as a catalyst. Which of the following products will be formed on addition of water to but-1-yne under these conditions ? |
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Answer» `CH_(3)-CH_(2)-CH_(2)-OVERSET(O)overset("||")C-H` |
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| 84904. |
Aldehydes are obtained by the catalytic dehydrogenation of _____ |
| Answer» SOLUTION :PRIMARY ALCOHOLS | |
| 84905. |
Aldehydes are isomeric with |
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Answer» Ketones |
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| 84906. |
Addition of water to alkynes occurs in acidic medium and in the presence of Hg^(2+) ions as a catalyst. Which of the following products will be formed on addition of water to but-1-yne under these conditions. |
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Answer» `CH_(3)-CH_(2)-CH_(2)-OVERSET(O)overset(||)(C)-H` |
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| 84907. |
Addition of water across the double bond of an alkene is presence of sulphuric acid giving follows _______ rule. |
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Answer» MARKOWNIKOFF's |
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| 84908. |
Aldehydes are generally more reactive than ketones towards nucleophillic addition reactions. Give two reasons. |
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Answer» SOLUTION :(a) STERIC EFFECT (B) ELECTRONIC effect. |
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| 84909. |
Addition of water to acetylenic compounds is catalysed by______and ______. |
| Answer» SOLUTION :`HgSO_(4),` DIL `H_(2)SO_(4)`. | |
| 84910. |
Aldehydes are generally more reactive than ketones towards nucleophilic addition reactions .anytwo reasons. |
| Answer» SOLUTION :(a) STERIC EFFECT(B) ELECTRONIC effect . | |
| 84911. |
Addition of to the aqueous hydrolysis of benzyl chloride dose not increase the rate of the hydrolysis but change only the composition of the final products. This indicates that the reaction is proceeding through |
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Answer» `S_N1` MECHANISMS |
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| 84912. |
Addition of solution of oxalate to an aqueous solution of mixture of Ba^(2+), Sr^(2+) and Ca^(2+) will precipitate : |
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Answer» `CA^(2+)` |
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| 84913. |
Aldehydes are first oxidation product of : |
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Answer» PRIMARY alcohals |
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| 84914. |
Additionof sulphurmonochlorideto ethene gives : |
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Answer» ETHYL SULPHIDE |
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| 84915. |
Aldehydes are first oxidation product of: |
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Answer» PRIMARY alcohols |
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| 84916. |
Addition of solution of oxalate to an aqueous solution of mixture of Ba^(++),Sr^(++) and Ca^(++) will precipitate |
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Answer» `Ca^(++)` |
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| 84917. |
Aldehydes are easily oxidisable yet propanal can conveniently br prepared by the oxidation of propanol by acid K_(2)Cr_(2)O_(7). |
| Answer» Solution :Aldehydes having boiling points less than 373 K can be REMOVED by DISTILLATION therefore propanol can easily be PREPARED from propanol by distillation from the ALCOHOL acid DICHROMATE solution. | |
| 84918. |
Addition of sodium thiousulphate solution to a solution of silver nitrate give 'X'as white precipitate, insoluble in water but soluble in excess thiosulphate solution to give 'Y'. On boiling in water, 'Y' gives 'Z'. 'X','Y' and 'Z'. respectively, are |
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Answer» `Ag_2S_2O_3,Na_3[AG(S_2O_3)_2],Ag_2S`
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| 84919. |
Aldehydesare characterised by the general formula |
| Answer» Answer :A | |
| 84920. |
Addition of sodium hydrogen sulphite does not take place in |
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Answer» `(AAK_MCP_37_NEET_CHE_E37_026_A01)` |
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| 84921. |
Addition of sodium chloride to a saturated solution of silver chloride. |
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Answer» DISSOCIATION of `AGCI` increases |
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| 84922. |
Addition of SnCl_2 to HgCl_(2) gives ppt. |
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Answer» White TURNING to red |
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| 84923. |
Addition of SnCl_(2) to HgCI_(2) gives ppt. : |
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Answer» WHITE turning to GREY |
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| 84924. |
Aldehydes and ketones will not form crystalline derivatives with |
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Answer» <P>sodium bisulphite |
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| 84925. |
Addition ofone equivalent of bromine to 1,3-pentadiene produces: |
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Answer» 4, 5 dibromo-2-pentene |
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| 84926. |
Aldehydes and ketones undergo nucleophilic addition reactions. With weak nucleophiles such as ammonia and its derivatives, (H_2 N-Z), aldehydes and ketones react in weakly acidic medium to form compounds containing carbonnitrogen double bond with the elimination of water to form . Aldehydes can be easily oxidised to carboxylic acid on treatment with common oxidising agents like KMnO_4 K_2 Cr_2 O_7 , HNO_3, etc. The carboxylic acid formed contain the same number of carbon atoms as the aldehydes. However ketones under drastic conditions with powerful oxidising agents undergo cleavage of C-C bond giving mixture of carboxylic acids having lesser number of C atoms than the original ketone.Name the product obtained when pentan-2-one is oxidised with conc. HNO_3 |
| Answer» SOLUTION :`UNDERSET("Popoff.srule ")(CH_3CH_2CH_2 - underset(O )underset(|| ) C-CH_3 OVERSET("CONC"HNO_3) toCH_3 CH_2COOH +CH_3 COOH ` | |
| 84927. |
Addition of one drop of HNO_(3) in group (III)qanalysis is to (a) _____. |
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Answer» |
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| 84928. |
Aldehydes and Ketones reacts with NH_2OH to form Aldoximes and Ketoximes respectively.Configuration of these can be determined by Beckmann rearrangement as that group migrates which is anti w.r.t-OH It is interesting to note that the migration of group is completely retentive and no loss of optical activity is seen. CH_3CHO+NH_2OHoverset(Delta)toPoverset(H^(o+))toQoverset(Br_2//KOH)toR(CH_3NH_2) (as only product) Following is correct |
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Answer» <P>Oxime P is syn form of geometrical isomers |
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| 84929. |
Aldehydes and ketones undergo reactions due to the presence of alpha-hydrogen atom. Write the name of the reaction of aldehyde which takes place only because of the presence of alpha-hydrogen atom. |
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Answer» |
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| 84930. |
Addition of NH_4Cl to NH_4OH results in : |
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Answer» INCREASES in `OH^-` concentration |
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| 84931. |
Aldehydes and Ketones reacts with NH_2OH to form Aldoximes and Ketoximes respectively.Configuration of these can be determined by Beckmann rearrangement as that group migrates which is anti w.r.t-OH It is interesting to note that the migration of group is completely retentive and no loss of optical activity is seen. Following is true about product |
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Answer» It is also (+) laevorotatory
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| 84932. |
Addition of O_2 on ethylene in presenceof Ag at 200^@C forms: |
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Answer» EPOXY ethane |
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| 84933. |
Aldehydes and Ketones reacts with NH_2OH to form Aldoximes and Ketoximes respectively.Configuration of these can be determined by Beckmann rearrangement as that group migrates which is anti w.r.t-OH It is interesting to note that the migration of group is completely retentive and no loss of optical activity is seen. |
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Answer»
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| 84934. |
Aldehydes and ketones react with oine molecule of analcohol to form compounds called hemiacetals, in which there is one hydroyl group and one either-like group. Reaction of a hemiacetal with a second molecule of alcohol gives an acetal and a molecule of water. We study this reaction Draw structural formulas for the hemicetal and acetal formed from these reagents. The stoichiometry of each reaction is given in the problem. Product Q is |
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Answer»
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| 84935. |
If NaOH is added to an aqueous solution of Zn^(2+) ions, a white precipitate appears and on adding access NaOH, the precipitate dissolves. In this solution zinc exists in the: |
| Answer» Answer :B | |
| 84936. |
On addition of mineral acid to an aqueous solution of Borax, the following compound is formed |
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Answer» Boron hydride `Na_(2)B_(4)O_(2) + 2HCl + 5H_(2)O to4H_(3)BO_(3) + 2NaCl` `Na_(2)B_(4)O_(7)+ H_(2)SO_(4) + 5H_(2)O to4H_(3)BO_(3) + Na_(2)SO_(4)` |
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| 84937. |
Aldehydes and ketones may be distinguished by using |
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Answer» saturated solution of `NaHSO_3` |
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| 84938. |
Aldehydes and ketones have high boiling point as compared to hydrocarbons and ethers of comparable molecular mass and less than that of alcohols. Give reason. |
Answer» Solution : Aldehydes and ketones have high boiling point as COMPARED to hydrocarbons and ethers of COMPARABLE molecular MASS. It is due to the WEAK molecular association in aldehyde and ketone arising out of the dipole-dipole interactions . ![]() These dipole-dipole interactions are weaker than intermolecular H-bonding. The boiling points of aldehydes and ketones are much lower than those of CORRESPONDING alcohols and carboxylic acids which possess inter molecular hydrogen bonding. |
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| 84939. |
Addition of mercuric acetate in the presence of water is called as oxymercuration.The adduct obtained gives alcohol on reduction with NaBH_4 in alkaline medium.This is known as demercuration.Oxymercuration demercuration allows Markownikoff's addition of H, OH without rearrangement.The net result is the addition of H_2O Answer the following question : Product 'A'is : |
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Answer»
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| 84940. |
Aldehydes and ketones have boiling points lower than those of ___and higher than those of_____of comparable masses. |
| Answer» SOLUTION :ALCOHOLS, ALKANES | |
| 84941. |
Addition of mercuric acetate in the presence of water is called as oxymercuration.The adduct obtained gives alcohol on reduction with NaBH_4 in alkaline medium.This is known as demercuration.Oxymercuration demercuration allows Markownikoff's addition of H, OH without rearrangement.The net result is the addition of H_2O Answer the following question : |
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Answer» ENOL FORMATION
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| 84942. |
Addition of mercuric acetate in the presence of water is called as oxymercuration.The adduct obtained gives alcohol on reduction with NaBH_4 in alkaline medium.This is known as demercuration.Oxymercuration demercuration allows Markownikoff's addition of H, OH without rearrangement.The net result is the addition of H_2O Answer the following question : CH_3-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)(C)-CH=CH_2underset((ii)CH_3OH NaBH_4NaOH)overset((i)Hg(OAc)_2.THF)toAoverset(Hi(Conc.))toBProduct B is : |
Answer»
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| 84943. |
Aldehydes and ketones give addition reactions with |
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Answer» HCN |
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| 84944. |
Addition of KI toHgI_2 forms complex K_2[HgI_4] having…… |
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Answer» YELLOW colour |
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| 84945. |
Aldehydes and ketones give |
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Answer» ELECTROPHILIC reaction |
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| 84946. |
Addition of KI to a solution of copper sulphate gives : |
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Answer» `CuI_2` |
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| 84947. |
Aldehydes and ketones form hydrocarbons by - |
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Answer» PHENYL hydrazine |
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| 84948. |
What happens when Potassium iodide solution is added to an aqueous solution of copper sulphate. Give equation. |
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Answer» `CuI_2` |
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| 84949. |
Aldehydes and ketones both give addition reaction with |
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Answer» PHENYL hydrazine |
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| 84950. |
Addition of FeCl_3 solution toK_4[Fe(CN)_6] solution gives : |
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Answer» Ferro-ferricyanide |
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