Recent questions tagged unit12

In the following sequence of reactions,the alkene affords the compound 'B':$CH_3CH=CHCH_3\quad\underrightarrow {O_3}\quad A\quad\underrightarrow {H_2O}\quad B$.The compound B is

asked Mar 20, 2014 by sreemathi.v

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Refer the below:

asked Mar 20, 2014 by sreemathi.v

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Which of the following on treatment with warm dilute $H_2SO_4$ in the presence of $HgSO_4$ will give butan-2-one?

asked Mar 19, 2014 by sreemathi.v

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Cleavage of ozonide gives aldehyde and ketone if it is carried out using

asked Mar 19, 2014 by sreemathi.v

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Which of the following are examples of nucleophilic addition reaction?

asked Mar 19, 2014 by sreemathi.v

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Which of the following are obtained to get naphthalene from benzene and succinic anhydride?

asked Mar 19, 2014 by sreemathi.v

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Aqueous solution of following compounds are electrolysed.Acetylene gas is obtained from

asked Mar 19, 2014 by sreemathi.v

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Which of the following species are planar?

asked Mar 19, 2014 by sreemathi.v

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$CH_4$ cannot be obtained by

asked Mar 19, 2014 by sreemathi.v

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o-Xylene on ozonolysis gives

asked Mar 19, 2014 by sreemathi.v

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When Grignard reagent is treated with water,alcohol,ammonia,$1^o$ amine,$2^o$ amine,alkyne-1 or carboxylic acid.We get alkane corresponding to alkyl part of Grignard reagent.In Grignard reagent C-atom is more electronegative than magnesium,hence its alkyl part acts are nucleophile and thus it will take an active hydrogen atom(H-atom that undergoes acylation) or acidic hydrogen atom to give its corresponding alkane.Also it is known that stronger acid displaces weak acid from weak acid salt.Total number of $1^o$ amine structures of a nitrogenous base having molecular formula $C_4H_{11}N$ is

asked Mar 19, 2014 by sreemathi.v

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When Grignard reagent is treated with water,alcohol,ammonia,$1^o$ amine,$2^o$ amine,alkyne-1 or carboxylic acid.We get alkane corresponding to alkyl part of Grignard reagent.In Grignard reagent C-atom is more electronegative than magnesium,hence its alkyl part acts are nucleophile and thus it will take an active hydrogen atom(H-atom that undergoes acylation) or acidic hydrogen atom to give its corresponding alkane.Also it is known that stronger acid displaces weak acid from weak acid salt.Molecular formula of an alcohol,0.44g of which when treated with $CH_3MgI$ liberates 112ml of $CH_4$ is

asked Mar 19, 2014 by sreemathi.v

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When Grignard reagent is treated with water,alcohol,ammonia,$1^o$ amine,$2^o$ amine,alkyne-1 or carboxylic acid.We get alkane corresponding to alkyl part of Grignard reagent.In Grignard reagent C-atom is more electronegative than magnesium,hence its alkyl part acts are nucleophile and thus it will take an active hydrogen atom(H-atom that undergoes acylation) or acidic hydrogen atom to give its corresponding alkane.Also it is known that stronger acid displaces weak acid from weak acid salt.$C_6H_5SO_3-H+CH_3-COONa\rightarrow$ Product.The product in the given reaction is

asked Mar 19, 2014 by sreemathi.v

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When Grignard reagent is treated with water,alcohol,ammonia,$1^o$ amine,$2^o$ amine,alkyne-1 or carboxylic acid.We get alkane corresponding to alkyl part of Grignard reagent.In Grignard reagent C-atom is more electronegative than magnesium,hence its alkyl part acts are nucleophile and thus it will take an active hydrogen atom(H-atom that undergoes acylation) or acidic hydrogen atom to give its corresponding alkane.Also it is known that stronger acid displaces weak acid from weak acid salt.Structure of hydrocarbon 0.34gm of which when treated with $CH_3MgI$ liberates 112ml of $CH_4$ at STP,will be

asked Mar 19, 2014 by sreemathi.v

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When Grignard reagent is treated with water,alcohol,ammonia,$1^o$ amine,$2^o$ amine,alkyne-1 or carboxylic acid.We get alkane corresponding to alkyl part of Grignard reagent.In Grignard reagent C-atom is more electronegative than magnesium,hence its alkyl part acts are nucleophile and thus it will take an active hydrogen atom(H-atom that undergoes acylation) or acidic hydrogen atom to give its corresponding alkane.Also it is known that stronger acid displaces weak acid from weak acid salt.In the below equation product is

asked Mar 19, 2014 by sreemathi.v

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$CH\equiv CH(X)+2CH_3COOH(Y)\rightarrow A\quad \underrightarrow{\Delta}\quad B+C$.B can be obtained from X by hydration and c can be obtained from Y by heating with $P_2O_5$.Hence A is

asked Mar 19, 2014 by sreemathi.v

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Which one of the following has the minimum boiling point?

asked Mar 19, 2014 by sreemathi.v

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Presence of a nitro group in a benzene ring

asked Mar 19, 2014 by sreemathi.v

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Which is the most suitable reagent among the following to distinguish compound (3) from rest of the compound(s)?\[\begin{array}{1 1}(1)\;CH_3C\equiv C-CH_3&(2)\;CH_3-CH_2-CH_2-CH_3\\(3)\;CH_3-CH_2-C\equiv CH&(4)\;CH_3-CH=CH_2\end{array}\]

asked Mar 19, 2014 by sreemathi.v

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Which of the following reactions will yield 2,2-dibromopropane?

asked Mar 19, 2014 by sreemathi.v

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Benzene does not undergo addition reactions easily because

asked Mar 19, 2014 by sreemathi.v

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Which of the following yield both alkane and alkene?

asked Mar 19, 2014 by sreemathi.v

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Which one of the following is reduced with zinc and hydrochloric acid to give corresponding hydrocarbon

asked Mar 19, 2014 by sreemathi.v

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The compound formed as a result of oxidation of ethyl benzene by $KMnO_4$ is

asked Mar 19, 2014 by sreemathi.v

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Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid.The product so obtained is diazotised and then heated with cuprous bromide.The reaction mixture so formed contains

asked Mar 19, 2014 by sreemathi.v

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