Recent questions tagged organic-chemistry

Which of the following compounds does not show lassaigne's test for nitrogen ?

asked Mar 3, 2014 by meena.p

2 answers

The enolic form of acetone contains

asked Mar 3, 2014 by meena.p

1 answer

For which of the following parameters the structural isomers $C_2H_5OH$ and $CH_3OCH_3$ would be expected to have the same values ? (Assume ideal behaviour )

asked Mar 3, 2014 by meena.p

1 answer

An enantiometrically pure acid is treated with racemix mixture of an alcohol having carbon. The ester formed will be :

asked Feb 28, 2014 by meena.p

1 answer

$CH_3,NH_2,OH$ and $F$ in increasing $pk_b $ values are :

asked Feb 28, 2014 by meena.p

1 answer

What is the decreasing order of strength of the bases. $OH^{-}.NH_2^{-}.HC \equiv C^{-}$ and $CH_3 -CH_2^{-} $?

asked Feb 28, 2014 by meena.p

1 answer

$CH_2 =CH CH_2CH =CH_2 \longrightarrow A,\;A $ is ?

asked Feb 28, 2014 by meena.p

1 answer

Br has a low reactivity in $CH_2 =CH-Br$ because (i) of -M effect of bromine (ii) of more electro negativity of bromine (iii) of partial double bond character between $C-Br $ bond. (iv) of the +M effect of bromine.

asked Feb 28, 2014 by meena.p

1 answer

Hydrolysis of neopentyl bromide under $SN_1$ process results into

asked Feb 28, 2014 by meena.p

1 answer

Which of the following is purified by vacuum distillation ? (i) Glycerine (ii) Glycerol (iii) propane 1,2,3- triol (iv) Ethanol

asked Feb 28, 2014 by meena.p

1 answer

Isomers which can not be interconverted through rotation around a single bond are : (i) Conformers ; (ii) diastereomers ; (iii) Enantiomers ; (iv) Positional isomers;

asked Feb 28, 2014 by meena.p

1 answer

The major product formed in the reaction given below is

asked Feb 28, 2014 by sreemathi.v

1 answer

The cannizzaro reaction of benzaldehyde and formaldehyde in the presence of $NaOH$ gives, $(i)\;C_6H_5CH_2OH\; ;(ii)\; C_6H_5COONa\; ; (iii)\; HCOONa \; ; (iv) \;CH_3OH$

asked Feb 28, 2014 by meena.p

1 answer

The major product formed in the reaction given below is

asked Feb 28, 2014 by sreemathi.v

1 answer

Which of the following compounds will have only primary and tertiary carbon? (i) Pentane (ii) 2- Methylbutane (iii) 2,3 -Dimethylbutane (iv) 2- Bromo-2-Methylpropane

asked Feb 28, 2014 by meena.p

1 answer

Refer the below reaction B is

asked Feb 28, 2014 by sreemathi.v

1 answer

Which of the following have zero dipole moment ? $(i)\; H_2;\; (ii)\;HF;\; (iii)\; CH_4; \; (iv) CHCl_3$

asked Feb 28, 2014 by meena.p

1 answer

Which of the following statements are correct ?

asked Feb 28, 2014 by meena.p

1 answer

Heating of below one produces

asked Feb 28, 2014 by sreemathi.v

1 answer

The statement which are correct regarding benzene are : (i) It has $12 \sigma$ and $3 \pi$ bonds. (ii) There is delocalisation of $\pi$ - electrons. (c) $C-C$ bond distance is $1.39 A^{\circ}$ . (d) $C-C$ bond distance is $1.39 A^{\circ}$ and $1.54\;A^{\circ}$ alternatively .

asked Feb 28, 2014 by meena.p

1 answer

Which of the following compounds are chiral and resolvable ? $(i) \;[C_6 H_5 N^+(CH_2CH_2CH_3)(C_2H_5)(CH_3)]Br^ - ; \; (ii) C_6H_5N(CH_3)(C_2H_5) ; \\ (iii)\; CH_3CH_2CH (CH_3) (C_2H_5);\; (iv)\; HO_2C- CO_2H$

asked Feb 28, 2014 by meena.p

1 answer

Compound A has a molecular formula $C_7H_7NO$ on treatment with $Br_2/KOH$.A gives an amine B which respond to carbylamine test.B on diazotisation and coupling with phenol gives an azo dye.A can be

asked Feb 28, 2014 by sreemathi.v

1 answer

Which of the following will undergo a connizzara reaction ?

asked Feb 28, 2014 by meena.p

1 answer

The correct sequence regarding basicity of following compounds are

asked Feb 28, 2014 by sreemathi.v

1 answer

In the reaction

asked Feb 28, 2014 by meena.p

1 answer

In the below reaction B is mainly

asked Feb 28, 2014 by sreemathi.v

1 answer

Which of the following reactions can be used to prepare the below one

asked Feb 28, 2014 by sreemathi.v

1 answer

Which of the following amine is less basic than aniline?

asked Feb 28, 2014 by sreemathi.v

1 answer

Deep blue colour formed by addition of copper (II) sulphate solution to ethyl amine is due to formation of

asked Feb 28, 2014 by sreemathi.v

1 answer

The number of isomer aromatic compounds possible for the formula $C_7H_9N$ is

asked Feb 28, 2014 by sreemathi.v

1 answer

Which of the following groups are the following groups are ortho, para directing ? $ \\ (i) -NH_2 \quad\quad\quad (ii)\; -N-C -CH_3 \quad\quad\quad (iii)\;-CN \quad\quad\quad(iv)\; -SO_3H$

asked Feb 28, 2014 by meena.p

1 answer

A compound X is formed when acetaldehyde condenses with ethyl amine.X on further catalytic hydrogenation $(H_2/Ni)$ will yield

asked Feb 28, 2014 by sreemathi.v

1 answer

In the below sequence Y is

asked Feb 28, 2014 by sreemathi.v

1 answer

A positive carbylamine test is given by

asked Feb 28, 2014 by sreemathi.v

1 answer

Which of the following statement are true for the organoborance ? (i) It can be thermally rearranged (ii) It can be oxidised to 3-pentanol (iii) It can be converted to pentane (iv) None of these.

asked Feb 28, 2014 by meena.p

1 answer

The major product obtained on heating of $CH_3CH_2CH_2CH_2N^{\oplus}(CH_3)_3OH^{\ominus}$

asked Feb 28, 2014 by sreemathi.v

1 answer

Kjeldahl's method cannot be used for estimation of nitrogen in $(i)\; C_6H_5NO_2 ;\; (ii)\;Pyridine; \;(iii)\;C_6H_5 - N = N -C_6H_5 ;\;(iv)\;C_6H_5NHCOCH_3 $

asked Feb 28, 2014 by meena.p

1 answer

Which of the following statement is correct?

asked Feb 28, 2014 by sreemathi.v

1 answer

Sandmeyer's reaction can be represented by

asked Feb 28, 2014 by sreemathi.v

1 answer

Hinsberg's reagent is

asked Feb 28, 2014 by sreemathi.v

1 answer

The reduction of nitro benzene with $Zn/NH_4Cl$(aq) gives

asked Feb 28, 2014 by sreemathi.v

1 answer

The major product obtained in the following reaction is

asked Feb 28, 2014 by sreemathi.v

1 answer

The correct order of base strength of the three isomers of methoxy aniline is

asked Feb 28, 2014 by sreemathi.v

1 answer

The molecules that will have dipole moments are : (i) 2,2 Dimethyl propane (ii) trans-2-pentene (iii) cis - 3 - Hexene (d) 2,2,3,3 -Tetramethyl butane

asked Feb 27, 2014 by meena.p

1 answer

When a carbon atom is linked to four different groups it is said to be chiral carbon atom. when alpha hydrogen atom of an alkane is replaced by a functional group we get corresponding compound.An optically active hydrocarbon $(A) C_6H_{10}$ on catalytic reduction gives optically inactive hydrocarbon . structure of $(A )$ is

asked Feb 27, 2014 by meena.p

1 answer

When a carbon atom is linked to four different groups it is said to be chiral carbon atom. when alpha hydrogen atom of an alkane is replaced by a functional group we get corresponding compound. IUPAC name for lowest molecular mas optically active alkene is

asked Feb 27, 2014 by meena.p

1 answer

When a carbon atom is linked to four different groups it is said to be chiral carbon atom. when alpha hydrogen atom of an alkane is replaced by a functional group we get corresponding compound. Lowest molecular mass optically active ketone contians ____ carbon atoms?

asked Feb 27, 2014 by meena.p

1 answer

When a carbon atom is linked to four different groups it is said to be chiral carbon atom. when alpha hydrogen atom of an alkane is replaced by a functional group we get corresponding compound. How many isomeric alkenes on catalytic reduction gives 3- methylhexane ?

asked Feb 27, 2014 by meena.p

1 answer

Among O-nitro aniline(I),P-nitro aniline (II),M-nitro aniline (III) the order of increasing basic strength is

asked Feb 27, 2014 by sreemathi.v

1 answer

When a carbon atom is linked to four different groups it is said to be chiral carbon atom. when alpha hydrogen atom of an alkane is replaced by a functional group we get corresponding compound. How many C- atoms are present in lowest molecular mass optically active alkane?

asked Feb 27, 2014 by meena.p

1 answer

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