Recent questions in Chemistry

Copper is an unreactive metal and doesn’t react in normal circumstances with dilute acids. However it does react with nitric acid. Which of the following equations represent how Copper reacts with DILUTE nitric acid?

asked Mar 16, 2014 by balaji.thirumalai

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In india which dye of the following was prepared from a plant grown on a large scale in india ?

asked Mar 16, 2014 by yamini.v

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Which of the following is NOT correct?

asked Mar 16, 2014 by balaji.thirumalai

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Which of the following forms micelles in aqueous solution, above certain concentration?

asked Mar 16, 2014 by mosymeow_1

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Which of the following is an alkaloid ?

asked Mar 16, 2014 by yamini.v

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Which one is an antibiotic ?

asked Mar 16, 2014 by yamini.v

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The volume of a colloidal particle, $V_c$ as compared to the volume of a solute particle, $V_s$ in a true solution could be

asked Mar 16, 2014 by mosymeow_1

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Given that metal oxides such as $Cr_2O_3$ and $Mn_3O_4$ cannot be reduced using Carbon or Carbon monoxide, which of the following must be true?

asked Mar 16, 2014 by balaji.thirumalai

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In Zeigler-Natta polymerisation of ethylene the active species is

asked Mar 16, 2014 by mosymeow_1

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Milk can be preserved by adding a few drops of

asked Mar 16, 2014 by mosymeow_1

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All monosaccharides ----------- Tollen's reagent .

asked Mar 16, 2014 by yamini.v

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Which of the following statements is TRUE?

asked Mar 16, 2014 by balaji.thirumalai

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The human body does not produce

asked Mar 16, 2014 by yamini.v

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Which base is present in RNA but met in DNA ?

asked Mar 16, 2014 by yamini.v

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Oils and fats are together called

asked Mar 16, 2014 by yamini.v

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Which of the following is not a function of proteins ?

asked Mar 16, 2014 by yamini.v

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An example of water soluble vitamin is

asked Mar 16, 2014 by yamini.v

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$\alpha\;$ - D (+) glucose and $\;\beta\;$ - D (+) glucose are

asked Mar 16, 2014 by yamini.v

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Which of the following has magnesium ?

asked Mar 16, 2014 by yamini.v

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Vitamin $\;B_{1}\;$ is

asked Mar 16, 2014 by yamini.v

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Which of the following statements is NOT Correct?

asked Mar 16, 2014 by balaji.thirumalai

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In which of the following arrangements is the order not according to the property indicated against it?

asked Mar 16, 2014 by balaji.thirumalai

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A peptide having molecular mass more than 10,000 u is called a

asked Mar 16, 2014 by yamini.v

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PH at which there is no net charge is called

asked Mar 16, 2014 by yamini.v

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The ionization enthalpy of hydrogen atom is $1.312 \times 10^{6} \; J/mol$. The energy required to excite the electron in the atom from $n=1 \rightarrow n = 2$ is:

asked Mar 16, 2014 by balaji.thirumalai

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Among the following elements, the one having the highest ionization energy is

asked Mar 16, 2014 by balaji.thirumalai

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Which of the following is a neutral amino acid ?

asked Mar 15, 2014 by yamini.v

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Starch is a polymer of

asked Mar 15, 2014 by yamini.v

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Which of the following is about 2000 times sweeter sucrose ?

asked Mar 15, 2014 by yamini.v

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Which of the following is Non - reducing sugar ?

asked Mar 15, 2014 by yamini.v

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In sucrose two monosaccharide units are linked to each other by a bond called

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Which enzyme help in fermentation of D-glucose ?

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Glucose does not give characteristic reactions of

asked Mar 15, 2014 by yamini.v

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The number of optical isomers glucose is ?

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Which one of the following is the class of glyceraldehyde ?

asked Mar 15, 2014 by yamini.v

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Which of the following class of carbohydrate is called Non - sugars ?

asked Mar 15, 2014 by yamini.v

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Which of the following is a trisaccharide ?

asked Mar 15, 2014 by yamini.v

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Which of the following is a Non - sugar form of carbohydrate ?

asked Mar 15, 2014 by yamini.v

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The element “M” forms the chloride $\text{MCl}_4$. If the chloride contains 75 % chlorine by mass, calculate the molar mass of element “M”.

asked Mar 15, 2014 by balaji.thirumalai

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The formation of the oxide ion $O^{2-}_{(g)} $ requires first an exothermic and then an endothermic step, as shown below:

asked Mar 15, 2014 by balaji.thirumalai

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Copper is extracted from its sulphiate are by

asked Mar 15, 2014 by meena.p

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By which of the following reactions is copper obtained?

asked Mar 15, 2014 by meena.p

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Matte contains

asked Mar 15, 2014 by meena.p

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Which element can be found in nature in the free (uncombined) state?

asked Mar 15, 2014 by meena.p

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Which metal is obtained commercially by the electrolysis of salt?

asked Mar 15, 2014 by meena.p

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At $STP,$ which substance is the best conductor of electricity?

asked Mar 15, 2014 by meena.p

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Which of the following elements' atom has the greatest ability to attract electrons?

asked Mar 15, 2014 by meena.p

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The first ionization energy of an element is 736 kJ per mole of atoms. An atom of this element in the ground state has a total of how many valence electrons?

asked Mar 15, 2014 by meena.p

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As atoms of elements in Group 16 are considered in order from top to bottom, the electronegativity of each successive element

asked Mar 15, 2014 by meena.p

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Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity is most closely related to the atoms'

asked Mar 15, 2014 by meena.p

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