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Recent questions tagged unit11

Given that the furthest the earth gets from the sun is approximately 94.56 million miles, and the eccentricity of earth's orbit is approximately 0.017, what is the closest approach of the earth to the sun.

asked Apr 8, 2014 by balaji.thirumalai

1 answer

In the below reaction,the reactive intermediate formed is

asked Feb 27, 2014 by sreemathi.v

1 answer

What would be the reagent in the below reaction

asked Feb 27, 2014 by sreemathi.v

1 answer

In the below reaction P is

asked Feb 27, 2014 by sreemathi.v

1 answer

What would be the major product on the following reaction?

asked Feb 27, 2014 by sreemathi.v

1 answer

Which of the following statement is correct?

asked Feb 27, 2014 by sreemathi.v

1 answer

A new carbon-carbon bond formation is possible in

asked Feb 27, 2014 by sreemathi.v

1 answer

What would be the product in the below reaction:

asked Feb 27, 2014 by sreemathi.v

1 answer

What could be the major product in the below reaction

asked Feb 27, 2014 by sreemathi.v

1 answer

Phenol undergoes condensation with acetaldehyde in acidic (or) alkali medium gives

asked Feb 27, 2014 by sreemathi.v

1 answer

Phenol on exposure to air produces

asked Feb 27, 2014 by sreemathi.v

1 answer

In the following compounds

asked Feb 27, 2014 by sreemathi.v

1 answer

The below reaction is known as

asked Feb 27, 2014 by sreemathi.v

1 answer

The fries rearrangement of the below reaction ,the P is

asked Feb 27, 2014 by sreemathi.v

1 answer

Which one of the following reagents is used in the below reaction?

asked Feb 26, 2014 by sreemathi.v

1 answer

The claisen rearrangement of the below reaction the product is

asked Feb 26, 2014 by sreemathi.v

1 answer

What would be the major product in the following reaction?

asked Feb 26, 2014 by sreemathi.v

1 answer

In the following compounds the order of acid strength is

asked Feb 26, 2014 by sreemathi.v

1 answer

Which of the following statement is correct?

asked Feb 26, 2014 by sreemathi.v

1 answer

In the below reaction the products A and B are

asked Feb 26, 2014 by sreemathi.v

1 answer

Phenols can be prepared by

asked Feb 26, 2014 by sreemathi.v

1 answer

In the following reaction :The structure of the major product X is

asked Feb 26, 2014 by sreemathi.v

1 answer

An ester (A) with molecular formula $C_9H_{10}O_2$ was treated with excess of $CH_3MgBr$ and the compound so formed was treated with conc.$H_2SO_4$ to form olefin (B).Ozonolysis of B gave ketone with formula $C_8H_8O$ which shows iodoform test positive.The structure of A is

asked Feb 26, 2014 by sreemathi.v

1 answer

Given: $CH_3COCH_3$ $\large\xrightarrow[\quad pyrolysis \quad]{700^{\large\circ}C}$ $A$ $\large\xrightarrow {CH_3COOH}$ $B$ $\large\xrightarrow {RCOOH} C$ based on these reactions. Write the structures of A and C

asked Feb 26, 2014 by sreemathi.v

1 answer

Refer the below reaction:Compound F gives positive Schiff's test but (E) does not.Give structures of A and F

asked Feb 26, 2014 by sreemathi.v

1 answer

An organic acid ($X$) has molecular formula $C_8H_{16}O_2$ $X$ on heating with $NH_3$ forms $Y$ which on treatment with alkaline $Br_2$ forms $Z$.$Z$ on treatment with $HNO_2$ followed by heating with $H_2SO_4$ gives $2$,$4$-dimethyl-$2$-pentene.What are the structures of $X$ and $Z$?

asked Feb 26, 2014 by sreemathi.v

1 answer

Which of the following carboxylic acid under goes decarboxylation easily?

asked Feb 26, 2014 by sreemathi.v

1 answer

Which of the following statements is correct?

asked Feb 26, 2014 by sreemathi.v

1 answer

The major product obtained on heating $\gamma$-hydroxy acid $CH_3-CH_2-CHOH-CH_2-CH_2-COOH$ is

asked Feb 26, 2014 by sreemathi.v

1 answer

In the below sequence X and Y are

asked Feb 26, 2014 by sreemathi.v

1 answer

Which of the following compound observed in the mechanism of Beckmann rearrangement of the below

asked Feb 26, 2014 by sreemathi.v

1 answer

The correct acid strength order of the compounds

asked Feb 26, 2014 by sreemathi.v

1 answer

The treatment of $LiAlH_4$ with the below one leads to

asked Feb 26, 2014 by sreemathi.v

1 answer

Which carboxylic acid will show HVZ reaction?

asked Feb 25, 2014 by sreemathi.v

1 answer

In the below sequence of reaction X and Y are respectively

asked Feb 25, 2014 by sreemathi.v

1 answer

Propionic acid $\quad \underrightarrow{PCl_3}\quad X\quad\underrightarrow{C_6H_6}\quad Y$.In this sequence Y is

asked Feb 25, 2014 by sreemathi.v

1 answer

The two cleavage reactions are given below :

asked Feb 25, 2014 by sreemathi.v

1 answer

The below reaction with (i) $NH_3,H_2O$,(ii) acid HCl respectively give

asked Feb 25, 2014 by sreemathi.v

1 answer

In the following reaction the structure of the major product X is

asked Feb 25, 2014 by sreemathi.v

1 answer

Which of the following is the major product of the reaction shown below

asked Feb 25, 2014 by sreemathi.v

1 answer

The ratio of de-Broglie wavelength of moleculus of hydrogen and helium in two gas jars kept separately at temperatures $\;27^{0} C\;$ and $\;127^{0} C\;$ respectively is

asked Feb 25, 2014 by yamini.v

1 answer

The ratio of de-Broglie wavelength of a $\;\alpha\;$ particle to that of proton being subjected to same magnetic field so that the radii of their path are equal to each other assuming the field induction vector $\;\overrightarrow{B}\;$ is perpendicular to velocity vectors of $\;\alpha-\;$ particle and proton , is

asked Feb 25, 2014 by yamini.v

1 answer

A chiral $C_5H_{10}O$ ether reacts with hot $HI$ to give a $C_5H_{10}I_2$ product.Treatment of this with hot $KOH$ in ethanol produces $1$,$3$-pentadiene.What is the structure of the original ether?

asked Feb 25, 2014 by sreemathi.v

1 answer

If a stationary electron gets annihilated due to association with a stationary positron (hypothetically), the wavelength of resulting radiation will be .

asked Feb 25, 2014 by yamini.v

1 answer

Which of the following is expected to have the lowest boiling point?

asked Feb 25, 2014 by sreemathi.v

1 answer

Acid-catalysed reaction of oxirane is given below:

asked Feb 25, 2014 by sreemathi.v

1 answer

When a metallic surface is illuminated with monochromatic light of wavelength $\;\lambda\;$ and stopping potential for photo electron current is $\;3V_{0}\;$ . When some metallic surface is illuminated with a light of wavelength $\;2 \lambda\;$ , The stopping potentials is $\;V_{0}\;$ . The threshold wavelength for surface is

asked Feb 25, 2014 by yamini.v

1 answer

In the below reaction product is/are

asked Feb 25, 2014 by sreemathi.v

1 answer

A photon of wavelength $\;5030 A^{0}\;$ is incident on a totally reflecting surface. The momentum delivered by photon is equal to

asked Feb 25, 2014 by yamini.v

1 answer

The formation of peroxide linkage in either due to the exposure in air can be detected by treating in with

asked Feb 25, 2014 by sreemathi.v

1 answer

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