Recent questions in Chemistry

Refer to the below equation:

asked Dec 4, 2013 by sreemathi.v

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Identify the product

asked Dec 4, 2013 by sreemathi.v

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Refer to the below equation :

asked Dec 3, 2013 by sreemathi.v

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Refer to the below reaction :

asked Dec 3, 2013 by sreemathi.v

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Refer to the below reaction:

asked Dec 3, 2013 by sreemathi.v

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The product of of the following reaction can be

asked Dec 3, 2013 by sreemathi.v

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Arrange in the decresing order of reactivity with HOCl

asked Dec 3, 2013 by sreemathi.v

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Which of the following alkanes will give single product with a methylene insertion?

asked Dec 3, 2013 by sreemathi.v

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Refer to the below reaction :

asked Dec 3, 2013 by sreemathi.v

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Which order are correct regarding stability?

asked Dec 3, 2013 by sreemathi.v

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Which orders are correct regarding melting point?

asked Dec 3, 2013 by sreemathi.v

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Which will have the highest heats of hydrogenation?

asked Dec 3, 2013 by sreemathi.v

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Arrange the following alkenes in increasing order of their enthalphy of hydrogenation

asked Dec 3, 2013 by sreemathi.v

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Under conditions where carbocation rearrangements are not observed, 3 products are obtained from the addition of HBr to 1,3-pentadiene. Which of the following structures are not expected to be among the products?

asked Dec 3, 2013 by sreemathi.v

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Arrange the following alkenes in the increasing order of their heat of hydrogenation

asked Dec 3, 2013 by sreemathi.v

1 answer

Refer to the below reaction:

asked Dec 3, 2013 by sreemathi.v

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Rank the alkenes given below in terms of their relative stability starting with the most stable?

asked Dec 3, 2013 by sreemathi.v

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Examine the following reaction

asked Dec 3, 2013 by sreemathi.v

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Select the starting material for the following reaction

asked Dec 3, 2013 by sreemathi.v

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Select the best starting material for the following reaction

asked Dec 3, 2013 by sreemathi.v

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How many stereoisomers of the main product will form in the following reaction?

asked Dec 3, 2013 by sreemathi.v

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Consider the following transformation in which a cyclic bromoether is formed than the expected bromohydrin. Which of the electron pushing scheme represents the mechanism of this reaction?

asked Dec 3, 2013 by sreemathi.v

1 answer

Protonation of 1,2-butadine gives carbocation(A) and protonation of 2-butene gives carbocation(B). In both case the most stable crbocation possible is produced but no carbocation rearrangements take place. Which of the two carbocation is more stable and why?

asked Dec 3, 2013 by sreemathi.v

1 answer

There are three common ways to convert an alkene into alcohol: a) acid catalysed hydration, b)hydroboration -oxidation and c)oxymercuration-demercuration. Which of the following statements about these reactions is correct?

asked Dec 2, 2013 by sreemathi.v

1 answer

Consider the following reaction

asked Dec 2, 2013 by sreemathi.v

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1-Methyl cyclopentene can be

asked Dec 2, 2013 by sreemathi.v

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Arrange in decreasing order of reactivity with HCl

asked Dec 2, 2013 by sreemathi.v

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Refer to the below equation:

asked Dec 2, 2013 by sreemathi.v

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Which order are correct regarding the melting point?

asked Dec 2, 2013 by sreemathi.v

1 answer

Arrange the following alkenes in the increasing order of their heats of hydrogenation: 1.2-methyl butene,2.cis -2pentene,3.3-methyl butene

asked Dec 2, 2013 by sreemathi.v

1 answer

Vinyl cyclopropane on reaction with HBr yields which of the following as major product

asked Dec 2, 2013 by sreemathi.v

1 answer

Silica is eliminated during the process as:

asked Nov 29, 2013 by sreemathi.v

1 answer

$\Rightarrow A\overset{HBr}{\rightarrow}C_2H_5Br\overset{B}{\rightarrow}A$.B is

asked Nov 29, 2013 by sreemathi.v

1 answer

$\Rightarrow A\overset{HBr}{\rightarrow}C_2H_5Br\overset{B}{\rightarrow}A$.A is

asked Nov 29, 2013 by sreemathi.v

1 answer

Flurosis disease is caused due to the reaction of __________with excess of fluride in the body

asked Nov 29, 2013 by sreemathi.v

1 answer

In the ground state an element has 13 electrons in M shell.The element is

asked Nov 29, 2013 by sreemathi.v

1 answer

The number of lone pairs of e's present in $Xe$ in $XeF_4$

asked Nov 29, 2013 by sreemathi.v

1 answer

Chloroethane reacts with $X$ to form diethyl Either.What is $X$?

asked Nov 29, 2013 by sreemathi.v

1 answer

Which of the following is Lucus reagent?

asked Nov 29, 2013 by sreemathi.v

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In which of the following $H_2O_2$ acts as reducing agent?

asked Nov 29, 2013 by sreemathi.v

1 answer

Which of the following is used in the preparation of generated water (soda)?

asked Nov 29, 2013 by sreemathi.v

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Which of the following is anhydride of $HNO_3$?

asked Nov 29, 2013 by sreemathi.v

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Which of the following in oxide mineral

asked Nov 29, 2013 by sreemathi.v

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Mortar is mixture of

asked Nov 29, 2013 by sreemathi.v

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A gas decolourises $Br_2$ in $CCl_4$ and forms a precipitate with Ammoniacal silver nitrate .The gas is

asked Nov 29, 2013 by sreemathi.v

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Carbogen is _____________

asked Nov 29, 2013 by sreemathi.v

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The oxidation number of sulphur in $S_8$

asked Nov 29, 2013 by sreemathi.v

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$2D_2O\overset{electrolysis}{\rightarrow}$

asked Nov 29, 2013 by sreemathi.v

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$Mg_3N_2+6D_2O\rightarrow x$

asked Nov 29, 2013 by sreemathi.v

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$CaO+D_2O\rightarrow Ca(OD)_2\downarrow$

asked Nov 29, 2013 by sreemathi.v

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