Recent questions in Chemistry

Which of the following below is used as an eye lotion?

asked Mar 18, 2014 by mosymeow_1

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Fertile soils are also colloidal in nature. Which of the following acts as a protective colloid in soil?

asked Mar 18, 2014 by mosymeow_1

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Hydrogenation of the below compound is the presence of poisoned palladium catalyst gives

asked Mar 18, 2014 by sreemathi.v

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$CH_3-CH=CH_2+NOCl\rightarrow P$.identify the adduct

asked Mar 18, 2014 by sreemathi.v

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The volume of a couridal particle , $\;V_{c}\;$ as compared to the volume of a solute particle , $\;V_{s}\;$ in a true solution could be

asked Mar 18, 2014 by yamini.v

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$\begin{array}{1 1}\text{Statement-1:1-Butane on reaction with HBr in the presence of a peroxide produces 1-bromobutane.}\\\text{Statement-2:It involves the formation of a primary radical}\end{array}$

asked Mar 18, 2014 by sreemathi.v

1 answer

In Zeigler-Natta polymerization of ethylene the active spices is

asked Mar 18, 2014 by yamini.v

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$\text{Statement-1:Addition of }Br_2\text{ to 1-butene gives two optical isomers}\\\text{Statement-2:The product contains one asymmetric carbon}$

asked Mar 18, 2014 by sreemathi.v

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Milk can be preserved by adding a few drops of

asked Mar 18, 2014 by yamini.v

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Glucose reacts with phenylhydrazine to form

asked Mar 18, 2014 by yamini.v

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Which of the following is used for the conversion of 2-hexyne into trans-2-hexene?

asked Mar 18, 2014 by sreemathi.v

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Which of the following natural sugar is the sweetest ?

asked Mar 18, 2014 by yamini.v

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Pyrolusite is

asked Mar 18, 2014 by meena.p

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Proteins $\large\xrightarrow {Hydrolysis}$ $A$ $\large\xrightarrow {Hydrolysis}$ $\alpha-$ Aminoacids

asked Mar 18, 2014 by yamini.v

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Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E.Compound E on further treatment with aqueous KOH yields compound F.Compound F is

asked Mar 18, 2014 by sreemathi.v

1 answer

In extraction of iron the changes taking place in the blast furnace is

asked Mar 18, 2014 by meena.p

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Which enzyme helps in the formation of Maltose from starch ?

asked Mar 18, 2014 by yamini.v

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Before introducing $FeO$ in blast furnace , it is converted to $Fe_2O_3$ by roasting so that

asked Mar 18, 2014 by meena.p

2 answers

Isobutyl magnesium bromide with dry ether and absolute alcohol gives

asked Mar 18, 2014 by sreemathi.v

2 answers

When propyne is treated with aqueous $H_2SO_4$ in presence of $HgSO_4$ the major product is

asked Mar 18, 2014 by sreemathi.v

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The catalyst required for acetylation of glucose is

asked Mar 18, 2014 by yamini.v

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When phenyl magnesium bromide reacts with t-butanol the product would be

asked Mar 18, 2014 by sreemathi.v

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On monochlorination of 2-methylbutane,the total number of chiral compounds formed is

asked Mar 18, 2014 by sreemathi.v

1 answer

Thomas stag is

asked Mar 18, 2014 by meena.p

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Identify the reagent from the following list which can easily distinguish between 1-butyne and 2-butyne

asked Mar 18, 2014 by sreemathi.v

1 answer

The substance not likely to contain CaCO3 is

asked Mar 18, 2014 by meena.p

1 answer

The products obtained via oxymercuration $(HgSO_4+H_2SO_4)$ of 1-butyne would be

asked Mar 18, 2014 by sreemathi.v

1 answer

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are?

asked Mar 18, 2014 by meena.p

2 answers

The reaction of propene with HOCl proceeds via the addition of

asked Mar 18, 2014 by sreemathi.v

2 answers

Which of the following is D(+) glyceraldehyde ?

asked Mar 18, 2014 by yamini.v

1 answer

In the presence of peroxide,hydrogen chloride and hydrogen iodide do not give anti-Markownikoff addition to alkenes because

asked Mar 18, 2014 by sreemathi.v

1 answer

Anti Markownikoff addition of HBr is not observed in

asked Mar 18, 2014 by sreemathi.v

1 answer

The reaction conditions leading to the best yields of $C_2H_5Cl$ are

asked Mar 18, 2014 by sreemathi.v

1 answer

Which one of the following will react fastest with $H_2$ under catalytic hydrogenation condition?

asked Mar 18, 2014 by sreemathi.v

1 answer

Silver containing lead as an impurity is removed by

asked Mar 18, 2014 by meena.p

1 answer

Which of the following will have least hindered rotation about carbon-carbon bond?

asked Mar 18, 2014 by sreemathi.v

1 answer

Cassiterite is an ore of

asked Mar 18, 2014 by meena.p

1 answer

Pyrolusite is a/an

asked Mar 18, 2014 by meena.p

1 answer

Among the following statements the incorrect one is

asked Mar 18, 2014 by meena.p

1 answer

Which of the following compounds does not dissolve in concentrated $H_2SO_4$ even on warming?

asked Mar 18, 2014 by sreemathi.v

1 answer

Match correct answer using the codes given below :

asked Mar 18, 2014 by meena.p

1 answer

In Goldschmidt aluminothermic process, which of the following reducing agent is used

asked Mar 18, 2014 by meena.p

1 answer

Mac Arthur process is used for

asked Mar 18, 2014 by meena.p

1 answer

Heating of ore in the absence of air below its melting point is called

asked Mar 18, 2014 by meena.p

1 answer

Calcination is used in metallurgy for removal of?

asked Mar 18, 2014 by meena.p

1 answer

The method is very useful for preparing semiconductors is

asked Mar 18, 2014 by meena.p

1 answer

Cassiterite is concentrated by

asked Mar 18, 2014 by meena.p

1 answer

Bredig's arc method is a method of preparation of colloidal solution, of metals such as gold, silver or platinum. Which of the following is involved in this method?

asked Mar 17, 2014 by balaji.thirumalai

1 answer

Why is a negatively charged sol formed when FeCl$_3$ is added to NaOH?

asked Mar 17, 2014 by balaji.thirumalai

1 answer

A sample of charcoal weighing $8\; g$ was brought into contact with a gas contained in a vessel of 1 Litre capacity at $37^{\circ}$. The pressure of the gas was found to fall from 700 to 450 mm. Calculate the volume of the gas (reduced to standard temperature and pressure, i.e, STP) that is adsorbed per gram of the adsorbent under the condition of the experiment (density of charcoal sample is 1.5 g cm3).

asked Mar 17, 2014 by balaji.thirumalai

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