Recent questions tagged ch3

Which three groups of the Periodic Table contain the most elements classified as metalloids (semimetals)?

asked Mar 14, 2014 by meena.p

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The element ununoctium belongs to

asked Mar 12, 2014 by meena.p

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The correct order of first ionization potential is :

asked Mar 12, 2014 by meena.p

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The formation of $O^{2-}(g)$ starting from $O(g)$ is endothermic by $603\;kjmol^{-1}$ .If electron affinity of O is$ -141\;kjmol^{-1}$, the second electron affinity of oxygen would be :

asked Mar 12, 2014 by meena.p

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The Electronic configuration of group 15 is

asked Mar 12, 2014 by meena.p

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The electron configuration of Actinides are gives as

asked Mar 12, 2014 by meena.p

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In Group 13 the first member is

asked Mar 11, 2014 by meena.p

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F ion has smaller size than F atom

asked Mar 11, 2014 by meena.p

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Which of the following configuration is expected to have max different in second and third ionization energy :

asked Mar 11, 2014 by meena.p

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In the periodic table the metallic character of elements:

asked Mar 11, 2014 by meena.p

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In the periodic table Electronegativity of elements :

asked Mar 11, 2014 by meena.p

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With the increase in Atomic number in a period

asked Mar 11, 2014 by meena.p

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1 ev of energy is equivalent to

asked Mar 11, 2014 by meena.p

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Which of the following elements has zero electron affinity ?

asked Mar 11, 2014 by meena.p

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Which of the following never has an oxidation state +1?

asked Mar 11, 2014 by meena.p

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Which of the following elements has the highest value of electron affinity.

asked Mar 11, 2014 by meena.p

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Which of the following elements has the basic oxide?

asked Mar 11, 2014 by meena.p

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Which of the following elements is expected to have max electro negative?

asked Mar 11, 2014 by meena.p

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Electronegativity of flurine is

asked Mar 11, 2014 by meena.p

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The correct order of ionization energy is

asked Mar 11, 2014 by meena.p

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The correct order of electro negativity is

asked Mar 11, 2014 by meena.p

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The correct order of electron affinity is :

asked Mar 11, 2014 by meena.p

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The statement that are true for the long form of periodic table are :(i) It reflects the sequence of filling the electrons in the order of sub energy levels s,p,d and f (ii)It helps predict the stable valency states of the elements

asked Mar 11, 2014 by meena.p

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The 1st ionization potential Na,Mg,Al and Si are :

asked Mar 11, 2014 by meena.p

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The electro negativity of the following elements increase in the order :

asked Mar 11, 2014 by meena.p

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Atomic radii of fluorine and neon in Angstrom units are respectively

asked Mar 11, 2014 by meena.p

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The first ionization potentials in electrons volts of nitrogen and oxygen atoms are respectively given by

asked Mar 11, 2014 by meena.p

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The electronic configuration of the atom having max difference in first and 2nd ionization energies.

asked Mar 7, 2014 by meena.p

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The difference between atomic radii is max in which one of the following pairs.

asked Mar 7, 2014 by meena.p

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In which one of the following pairs, the radius of the second species is greater than that of the first.

asked Mar 7, 2014 by meena.p

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The atomic numbers of $V,Cr,Mn$ and $Fe$ are respectively $23,24,25$ and $26$. Which one of these may be expected to have the highest second ionization enthalpy ?

asked Mar 7, 2014 by meena.p

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The second ionization energies of the $C,N,O$ and $F$ atoms are such that,

asked Mar 7, 2014 by meena.p

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The electronegative of the following elements increase in the order.

asked Mar 6, 2014 by meena.p

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The order of 1st ionization energies of the elements

asked Mar 6, 2014 by meena.p

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The element with the highest 1st ionization potential is :

asked Mar 6, 2014 by meena.p

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Which of these is the most basic oxide.

asked Mar 6, 2014 by meena.p

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Which of the following is Paramagnetic ?

asked Mar 6, 2014 by meena.p

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Electronegativity of an element is $1.0$ on the pauling scale its value on mulliken scale is

asked Mar 6, 2014 by meena.p

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Which one of the following is the smallest in size ?

asked Mar 6, 2014 by meena.p

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The Outermost electronic configuration of the most electronegative element is

asked Mar 6, 2014 by meena.p

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Correct order of $(IE)$ among the following $Be,B,C,N,O$

asked Mar 6, 2014 by meena.p

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Atomic radii of flurine and neon in Angstrom units are respectively given by

asked Mar 6, 2014 by meena.p

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The electronic affinity values (in KJ molt) of 3 halogens X,Y,Z are respectively $-349,-333,-325$. Then X and Y are Z respectively

asked Mar 6, 2014 by meena.p

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Which one of the following arrangements represents the correct order of electron gain enthalpy

asked Mar 6, 2014 by meena.p

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Identify the correct order in which the ionic radius of the following ions increases. $(I) \;F^{-};\;(II)\;Na^{+};\;(III) \;Na^{3-}$

asked Mar 6, 2014 by meena.p

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The ions $O^{2-},F^{-},Na^{+},Mg^{2+}$ and $Al^{3+}$ are iso electronic, Their ionic radii show.

asked Mar 6, 2014 by meena.p

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Which of the following arrangements show the correct order of increasing lattice energy ?

asked Mar 6, 2014 by meena.p

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The first , second, third and fourth ionization energies of a given element are $80,2.43,3.66$ and $25.03 \;MJmol$ respectively

asked Mar 6, 2014 by meena.p

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Which of the following arrangement shows the correct order of increasing stability ?

asked Mar 6, 2014 by meena.p

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The correct sequence of the ionic radii of the following is

asked Mar 6, 2014 by meena.p

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