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question_answer1) Name two important uses of formalin.
question_answer2) Mention an industrial product manufactured from methanol
question_answer3) What happens when : (a) Acetaldehyde is reacted with a trace of (b) Formaldehyde reacts with
question_answer4) Which type of aldehydes undergo Cannizzaro's reaction?
question_answer5) Which type of aldehydes undergo aldol condensation?
question_answer6) What happens when methanal reacts with followed by hydrolysis? Give chemical equation.
question_answer7) When propanone is subjected to Wolff kishner reduction, what product will be obtained? Give chemical equation.
question_answer8) Vapour of ethanol when passed over heated Cu yields .....
question_answer9) In Cannizzaro's reaction, the final product is mixture of ..... and ........
question_answer10) ....... of alkene followed by reduction with gives aldehyde and ketone.
question_answer11) Propose the mechanism for the following reaction :
question_answer12) Write distinction test for acetaldehyde and acetone.
question_answer13) Write one chemical reaction to exemplify Cannizzaro reaction.
question_answer14) Account for the following : Sodium bisulphite is used for the purification of aldehydes and ketones.
question_answer15) How is acetone obtained from 2-bromopropane?
question_answer16) How are formalin and trioxane related to methanal?
question_answer17) What is carboxylic acid ?
question_answer18) What is the hybridisation of C in carboxylic acid group?
question_answer19) Draw the resonance structure of carboxylic group.
question_answer20) What are fatty acids?
question_answer21) The carboxylic carbon is less electrophonic than carbonyl carbon. Explain.
question_answer22) What happens when primary alcohols are oxidised by potassium permanganate.
question_answer23) Predict the product,
question_answer24) Which compound is formed when a primary alcohol undergoes oxidation with in
question_answer25) What happens when alkyl benzene is oxidised by chromic acid or alkaline
question_answer26) Which compound is formed by the hydrolysis of alkane nitrite?
question_answer27) What happens when dry ice reacts with alkyl magnesium halide followed by hydrolysis?
question_answer28) What is the molecular state of carboxylic acids in vapour phase or in aprotic medium?
question_answer29) Carboxylic acids are higher boiling liquids than that of aldehydes, ketones or alcohols.
question_answer30) What happens when carboxylic acid reacts with metals?
question_answer31) What happens when carboxylic acids react with sodium hydrogen carbonates?
question_answer32) Arrange the following in increasing acidic strength.
question_answer33) What happens when ethanoic acid is heated with or ?
question_answer34) What is etherification?
question_answer35) What happens when carboxylic acid reacts with alcohols or phenols in the presence of mineral acid catalyst?
question_answer36) What happens when carboxylic acids are reduced by or diborane?
question_answer37) What happens when sodium salts of carboxylic acids are heated with soda lime?
question_answer38) What happens when alkali metal salts of carboxylic acids undergo electrolysis?
question_answer39) Which salt is used as food preservative?
question_answer40) What is vinegar?
question_answer41) Name the carboxylic acid used in the manufacture of nylon-66.
question_answer42) Ester of which acid is used in perfumery?
question_answer43) In vapour state ethanoic acid show abnormal molecular mass. Explain.
question_answer44) What is decarboxylation?
question_answer45) What happens when reacts with bromine in the presence of red phosphorus.
question_answer46) Give two uses of ethanoic acid
question_answer47) Give one use of benzene-1,4-di-carboxylic acid.
question_answer48) What is glacial acetic acid?
question_answer49) Give two reactions to distinguish between aldehydes and ketones.
question_answer50) The boiling points of aldehydes and ketones are lower than that of the corresponding alcohols and acids. Why?
question_answer51) Write chemical equations for the following reactions : (a) Action of cone. NaOH solution on 2,2-dimethyl- propanal. (b) Action of dilute NaOH solution on propanal.
question_answer52) Write the various steps indicating reagents/conditions: required for the following conversion :
question_answer53) How will you obtain an aldehyde by using following process: (a) Dehydrogenation, (b) Catalytic hydrogenation?
question_answer54) Which aldehyde is a gas? Why is it soluble in water? What is name given to its aqueous solution? Give its uses.
question_answer55) Write the mechanism of addition of HCN to group.
question_answer56) What happens when CH^CHO reacts with HCN and the products are hydrolysed? Give chemical equation and state whether the product formed is optically active or not and why?
question_answer57) Convert : Ethanol to propanone.
question_answer58) Convert : (i) Acetaldehyde to methane, (ii) Acetaldehyde to acetone (iii) Acetylene to acetone.
question_answer59) Distinguish between : (i) Acetaldehyde and propanone. (ii) Acetone and formaldehyde (iii) Ethyl alcohol and acetaldehyde (iv) 2-Pentanone and 3-pentanone (v)and (vi) Propanol and prop none (viii) Acetaldehyde and benzaldehyde. Give chemical equations.
question_answer60) Account for the following observation : Oxidation of toluene to benzaldehyde with is carried out in presence of acetic anhydride.
question_answer61) Account for the following : Formaldehyde gives Cannizzaro's reaction whereas acetaldehyde does not.
question_answer62) Complete the following reactions : (i) (ii)
question_answer63) Write short notes on the following : (i) Cannizzaro's reaction (ii) Rosenmund reaction (iii) Wolff kishner reduction (iv) Aldol condensation.
question_answer64) Give examples of the following : (i) Kolbe's electrolytic reaction (ii) Kolbe's reaction (iii) Friedel craft's reaction
question_answer65) State one reaction as an example in each case: (ii) Rosenmund reduction (ii) Cannizzaro's reaction,
question_answer66) Write one chemical reaction each to illustrate the following: an acylation reaction
question_answer67) State one test each to distinguish between : Acetaldehyde and acetone.
question_answer68) A compound having the molecular formula forms a crystalline white ppt. with sodium bisulphite and reduces Fehling solution. Suggest the structural formula and IUPAC name of this compound. Name an isomer for it from a group other than its own.
question_answer69) Complete the following reactions :
question_answer70) How are the following obtained : 2-Phenyl-2-butanol from acetophenone.
question_answer71) Describe simple chemical tests to distinguish between the following pair of compounds : propanal and prop none.
question_answer72) Write the reactions with conditions for the following conversions : methanol to propan-1-ol.
question_answer73) Why are aldehydes more reactive than ketones towards nucleophilic reactions?
question_answer74) Write the equation of the reactions of ethanal with : (i) Fehling's solution (ii) Phenyl hydrazine (iii) Hydroxylamine.
question_answer75) Convert : acetaldehyde to 2-butenal.
question_answer76) How will you carry out the following conversions : (i) Acetone to chloroform (ii) Acetylene to acetic acid (iii) 2-methyl-l-bromo propane to 3-methylbutanal (iv) Ethanol to 1,3-butanediol (v) Benzyl chloride to benzaldehyde (vi) Acetophenone to benzoic acid.
question_answer77) How are following compounds prepared : acetophenone from benzene?
question_answer78) Account for the following : Aldehydes are more volatile than the corresponding alcohols.
question_answer79) Give reasons for the following :
question_answer80) The boiling points of aldehydes and ketones are lower than the corresponding alcohols.
question_answer81) Complete the following equation :
question_answer82) Complete the following equations : (ii) (ii) (iii)
question_answer83) Write the equation for the reactions : reduction of acetone with
question_answer84) An aliphatic compound 'A' with a molecular formula of reacts with phenyl hydrazine to give compound 'B'. Reaction of 'A' within alkaline medium on warming gives a yellow precipitate 'C'. Identify the compounds A, B and C.
question_answer85) Two moles of organic compound 'A' on treatment with a strong base give two compounds '5' and 'C'. Compound '5' on dehydrogenation with Cu gives 'A' while acidification of 'C' yields carboxylic acid 'D' having molecular formula of Identify the compounds A, B, C and D.
question_answer86) State one chemical method each to distinguish between the following pairs of organic compounds : (i) Acetaldehyde and acetone (ii) Propanone and ethanol.
question_answer87) Write reactions and conditions for the following conversions: Toluene to Benzaldehyde.
question_answer88) Write reactions stating conditions for the following conversions : (i) Benzene to Acetophenone (ii) Ethanal to propanone.
question_answer89) Write the series of reactions which would convert (i) Ethanol into propanone (ii) Phenol into benzaldehyde.
question_answer90) Write chemical tests to distinguish between : (i) Propanal and propanone (ii) Acetic acid and Acetaldehyde.
question_answer91) (a) Describe the following with the help of suitable examples : (i) Clemmensen reduction (ii) Cannizzaro's reaction. (b) Give one chemical reaction that can distinguish 2-pentanone from 3-pentanone. (i) The hybridized state of carbon (ii) the a and n bonds present and (iii) the electrophilic and nucleophilic centres in it.
question_answer92) Write the reaction with condition to bring about the following conversions : (i) Benzaldehyde to Benzyl alcohol (ii) Toluene to Benzaldehyde
question_answer93) Give reasons for the following facts : Treatment of benzaldehyde with HCN gives a mixture of two isomers which cannot be separated even by careful fractional distillation. (a) Write the structural formula of 3-phenyl prop-2-enal (b) Write one chemical equation each to illustrate the following reactions : Aldol condensation.
question_answer94) (a) Write the structural formula for 4-methyl pent-3-en- 2-one. (b) Write one chemical reaction to illustrate : Cannizzaro's reaction.
question_answer95) Write chemical equation to illustrate each of the following reactions : (a) (i) Acylation reaction (ii) Rosenmund reduction (b) Write the IUPAC name of the following compounds :
question_answer96) (a) Write the steps and conditions involved in the following conversions : Propene to acetone (b) Give a chemical test to distinguish between ethanol and propanal.
question_answer97) Ethanoic acid is miscible in water but benzoic acid is insoluble in water. Why?
question_answer98) Carboxylic acids are more acidic than phenols. Why?
question_answer99) Benzoic acid is stronger acid than acetic acid. Why?
question_answer100) Chloro acetic acid is stronger than acetic acid. Explain.
question_answer101) Formic acid (methanoic acid) is stronger than acetic acid.
question_answer102) How will you prepare phthalimide from phthalic acid?
question_answer103) What is Kolbe's electrolysis? Give example.
question_answer104) Explain Hell-Volhard Zeiinsky reaction.
question_answer105) Benzoic acid does not undergo Friedel-Crafts reaction.
question_answer106) Predict the product. (i) (ii)
question_answer107) The C - O bond in carboxylic acid is shorter than that in alcohol. Explain.
question_answer108) Account for the following : chloroacetic acid has lower value than acetic acid.
question_answer109) Give a chemical test to distinguish between HCOOH and .
question_answer110) How will you convert (a) Formic acid to acetic acid. (b) Benzoic acid to aniline.
question_answer111) What happens when, acetic acid is treated with
question_answer112) Describe the following with an example for each : Aldol condensation (ii) Trans-etherification
question_answer113) Describe the following : (i) Rosenmund reaction (ii) Tollens' reagent.
question_answer114) You are provided with the following four reagents and Schiffs reagents. Write which two reagents can be used to distinguish between the compounds in each of the following pairs : (i)and (ii)and
question_answer115) Write the chemical reactions of acetaldehyde with (i) Phenyl hydrazine (ii) Cone. NaOH solution Zn and Cone.
question_answer116) (a) How will you convert : (i) Benzoyl chloride to benzaldehyde (ii) Propanone to 2-propanol Write the reaction and state the reaction conditions in each case. (b) Write the names and structures of the products formed in the following reaction : (i) Reaction of semicarbazide with formaldehyde (ii) Oxidation of ethyl benzene with alkaline
question_answer117) Write the complete reaction for each of the following conversions stating the conditions necessary : (i) Toluene to benzaldehyde (ii) Aldehyde to acetal.
question_answer118) (a)Describe the preparation of acetic acid from acetylene (b) How can the following be obtained from acetic acid: (i) Acetaldehyde (ii) Acetone.
question_answer119) Give a chemical test to distinguish between phenol and benzoic acid.
question_answer120) Discuss the mechanism of etherification of carboxylic acids.
question_answer121) Which of the following can be nitrated more easily and why? Benzoic acid or phenol.
question_answer122) Out of nitrobenzoic acid and chlorobenzoic acid which one is a stronger acid and why?
question_answer123) How is carboxylic acid prepared from Grignard's reagent?
question_answer124) Carbonyl carbon is an electrophilic whereas carbonyl oxygen is a nucleophilic centre. Why?
question_answer125) What is the role of sulphur or quinoline in Rosenmund's reduction?
question_answer126) What is the advantage of using DIBAL-H as reducing agent?
question_answer127) Write the mechanism of nucleophilic addition reactions of carbonyl compound.
question_answer128) Benzaldehyde is less reactive than acetaldehyde towards nucleophilic substitution reaction.
question_answer129) The reaction of carbonyl compound with pure HCN is very slow and becomes fast in presence of a base.
question_answer130) What is the role of dry in the addition of alcohol to carbonyl group?
question_answer131) Addition of ammonia derivatives takes place in weakly acidic medium (pH =3.5) only. Why?
question_answer132) hydrogen of aldehydes and ketones are acidic. Why?
question_answer133) The aldol and ketol readily lose water to giveunsaturated carbonyl compounds. Give reasons.
question_answer134) Carbonyl compounds are more polar than alcohols although electro negativity difference between C and O atoms is less than O and H atoms. Explain.
question_answer135) Dialkyl cadmium is used to prepare ketones from acid chlorides and not from Grignard reagents. Assign reason.
question_answer136) In the preparation of aldehydes from primary alcohols, aldehydes formed must be distilled as soon as they are formed. Why?
question_answer137) Boiling points of carbonyl compounds lie between the parent alkanes and corresponding alcohols. Justify.
question_answer138) Hydrazones of aldehydes and ketones are not prepared in strongly acidic medium. Why?
question_answer139) lodoform is prepared by reacting acetone with hypoiodite and not with iodine. How will you account for it?
question_answer140) Halogen acids readily combine with alkenes to form addition products but fail to react with carbonyl compounds. Discuss.
question_answer141) Why does pure HCN fail to react with aldehydes and ketones?
question_answer142) Sodium bisulphite is used to purify aldehydes and ketones. Explain.
question_answer143) Out of benzaldehyde and propionaldehyde which is more reactive towards nucleophilic addition?
question_answer144) Boiling points of ketones are higher than those of the isomeric aldehydes. Assign reason.
question_answer145) Chloral hydrate is a gem-diol but still stable. How will you account for it?
question_answer146) Ketones are less reactive than aldehydes in the nuclephilic addition reactions. Justify.
question_answer147) Why does not formaldehyde take part in aldol condensation?
question_answer148) Why is it necessary to control the pH during the reaction of aldehydes and ketones with ammonia derivatives?
question_answer149) Benzophenone does not react with \[NaHS{{O}_{3}}\]. Explain.
question_answer150) Why does formaldehyde undergo Cannizzaro's reaction while acetaldehyde gives aldol condensation?
question_answer151) Why do aldehydes and ketones undergo a number of addition reactions?
question_answer152) How will you convert an alkene into an aldehyde containing one carbon atom more?
question_answer153) Outline the synthesis of \[PhC{{H}_{2}}C{{H}_{2}}CHO\]from benzene, ethylene oxide and an inorganic salt.
question_answer154) Why cannot formaldehyde be prepared by Rosenmund reduction?
question_answer155) Give the IUPAC name of (i) Isobutyraldehyde (ii) Acrolein (iii) Crotonaldehyde
question_answer156) Arrange the following in decreasing order of nucleophilic addition: \[C{{H}_{3}}CHO,\,C{{H}_{3}}COC{{H}_{3}},\,HCHO,\,{{C}_{2}}{{H}_{5}}COC{{H}_{3}}.\]
question_answer157) Arrange the following compounds in order of increasing reactivity towards HCN ; Acetaldehyde, Acetone, Di-tertiary butyl ketone, Methyl tertiary butyl ketone.
question_answer158) Name two reagents which can be used to convert \[>C=O\] to \[>C{{H}_{2}}\] group.
question_answer159) Which alkene upon reductive ozonolysis will give acetone as the product?
question_answer160) Name a reagent to distinguish between pentan-2-one and pentan-3-one.
question_answer161) Why is benzaldehyde less reactive than acetaldehyde towards nucleophilic addition reactions?
question_answer162) Formaldehyde gives cannizzaro's reaction while acetaldehyde does not. Why?
question_answer163) What happens when ethanal is treated with methyl magnesium iodide followed by hydrolysis?
question_answer164) Identify the compounds [E] to [J] in the following reactions. \[[E]\,\,\xrightarrow{\text{Li}\,\text{Al}{{\text{H}}_{\text{4}}}\text{/ether}}\,[F]+[G]\] \[[F]\,\,\xrightarrow{\text{PCC}}\,[H]\] \[[H]\,\,\xrightarrow{\text{NaOH}\,\,\text{(conc}\text{.)}}\,[I]\,\,+\,\,[F]\] \[[I]\,\xrightarrow{[J]}\,({{C}_{6}}{{H}_{5}}C{{O}_{2}})O\] \[[G]\,\xrightarrow[NaOH]{[J]}\,{{C}_{6}}{{H}_{5}}COO{{C}_{6}}{{H}_{5}}\]
question_answer165) Name the reagent by which most aldehydes can be made to undergo Cannizzaro's type reaction. Give the relevant equation also.
question_answer166) Why does not acetophenone give iodoform test?
question_answer167) Acetone forms bisulphite compound when heated with sodium bisulphite whereas di-tertiary butyl ketone fails to do so. Explain.
question_answer168) Although both and have a double bond, they exhibit different type of addition reactions. Explain.
question_answer169) Dipole moments of aldehydes and ketones are higher than those of alcohols. Explain.
question_answer170) Although aldehydes are easily oxidisable yet propanal can conveniently be prepared by the oxidation of propanol by acidic potassium dichromate.
question_answer171) Why are aldehydes more reactive than ketones?
question_answer172) Suggest a suitable oxidising agent for the conversion, \[{{(C{{H}_{3}})}_{2}}C=CHCOC{{H}_{3}}\xrightarrow{\,}\,{{(C{{H}_{3}})}_{2}}C\]\[=CHC{{O}_{2}}H\].
question_answer173) Fluorine is more electronegative than chlorine even then p-fluorobenzoic acid is a weaker acid than p-chlorobenzoic acid. Explain
question_answer174) Why carboxylic acids do not give the characteristic reactions of carbonyl group?
question_answer175) Arrange the following in decreasing order of electrophilicity
question_answer176) Predict the product of the following reaction
question_answer177) \[C{{H}_{3}}-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-OH\xrightarrow{2\,RLi}\,A,\,\,\,\,A\xrightarrow{{{H}_{3}}{{O}^{+}}}B.\] Identify A and B.
question_answer178) Identify A to E in the following reactions :
question_answer179) Identify A to E in the following series of reactions :
question_answer180) Complete each synthesis by filling the missing starting materials, reagents or products (X, Y and Z). (i) \[{{C}_{6}}{{H}_{5}}CHO+C{{H}_{3}}C{{H}_{2}}CHO\xrightarrow{NaOH}X\] (ii) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\xrightarrow{Y}\,C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}COOH\] (iii)\[C{{H}_{3}}{{(C{{H}_{2}})}_{9}}COO{{C}_{2}}{{H}_{5}}\xrightarrow{Z}\,C{{H}_{3}}{{(C{{H}_{2}})}_{9}}CHO\]
question_answer181) (a) Identity A, B and C in the following reaction \[HC\equiv CH\xrightarrow[HgS{{O}_{4}}]{dil.\,{{H}_{2}}S{{O}_{4}}}\,A\,\xrightarrow{dil.\,NaOH}B\xrightarrow{heat}C\] (b) Give reasons : (i) p-Nitrobenzoic acid has higher \[{{K}_{a}}\] value than benzoic acid. (ii) Acetone is highly soluble but benzophenone is not.
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