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Recent questions tagged periodicity
Questions
If $\varepsilon_{C-C}=348kJmol^{-1},\varepsilon_{C-H}=412kJ mol^{-1}$ and $\varepsilon_{H-H}=436KJ mol^{-1}$,the pauling electronegativity of C is about (Given : electronegativity of H =2.1)
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
medium
asked
Jul 28, 2014
by
sreemathi.v
1
answer
According to Pauling,the electronegativity difference between two atoms A and B is directly proportional to (where $\varepsilon$ represents bond enthalpy)
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
The correct order of Pauling electronegativity values for Li,Na and K is
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
The Pauling electronegativity for H is
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
Which of the following statements regarding electropositive nature of elements in a period is correct?
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
Which of the following elements is most electropositive?
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
Which of the following elements never has an oxidation state +1?
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
In the periodic table,electronegativity of elements
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
With the increase in atomic number in a period
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
Which of the following elements is expected to have maximum value of Pauling electronegativity?
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
The Pauling electronegativity value of fluorine is
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
The correct order of Pauling electronegativity is
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
The electronegativity of the following elements increases in the order
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
electronegativity
easy
asked
Jul 28, 2014
by
sreemathi.v
1
answer
Calculate the electronegativity of Flourine, given the following: $E_{H-H} = 104.2 \; kcal\;mol^{-1},\; E_{F-F} = 36.6\; kcal\;mol^{-1},\;E_{H-F} = 134.6 \; kcal\;mol^{-1},\;\chi_H = 2.1$
jeemain
cbse
chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
inorganic-chemistry
electronegativity
medium
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
Which of the following sets of bonds are correctly ordered from least to most polar?
cl51199
jeemain
cbse
chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
inorganic-chemistry
electronegativity
medium
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
Which of the following compounds is the most polar: H$_2$O (l), H$_2$S (g), HF (l), HCl (g) ?
cl51199
jeemain
cbse
chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
inorganic-chemistry
electronegativity
medium
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
Four elements P, Q, R and S belong to groups 13, 15, 16, and 17, but not in that order. The electronegativity values of four elements in the same period of the periodic table are listed below:
jeemain
cbse
chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
inorganic-chemistry
electronegativity
medium
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
How much energy in kJ is released when 7.1 g of Chlorine are completely converted to Cl$^{-}$ ions in the gaseous state?
cl51149
jeemain
chemistry
classification-of-elements-and-periodicity-of-properties
ch3
periodicity
electron-gain-enthalpy
inorganic-chemistry
medium
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
How much energy in kJ is released when 3.55g of Chlorine are completely converted to Cl$^{-}$ ions in the gaseous state?
jeemain
chemistry
classification-of-elements-and-periodicity-of-properties
ch3
periodicity
electron-gain-enthalpy
inorganic-chemistry
medium
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
The first ionization potentials of Na, Mg, Al and Si in order is best represented as?
cl51145
cl51143
jeemain
chemistry
classification-of-elements-and-periodicity-of-properties
ch3
periodicity
ionization-enthalphy
inorganic-chemistry
medium
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
The first ionization potentials of Na, Mg, Al and Si in order is best represented as?
cl51143
jeemain
chemistry
classification-of-elements-and-periodicity-of-properties
ch3
periodicity
ionization-enthalphy
inorganic-chemistry
medium
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
The first ionization potentials in electron volts of nitrogen and oxygen are respectively given by?
jeemain
chemistry
classification-of-elements-and-periodicity-of-properties
ch3
periodicity
ionization-enthalphy
inorganic-chemistry
medium
asked
Jul 24, 2014
by
balaji.thirumalai
1
answer
The radii of F, O, F$^{-}$ and O$^{2-}$ follows which of the following orders:
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
medium
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
The ionic radius of Na$^{+}$ ion is 0.95 and the inter-nuclear distance between ion pairs in the NaCl crystal is 2.76. What is the radius of the Cl$^{-}$ ion?
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
medium
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Which of the following statements are incorrect?
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
medium
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the following sets of atoms and ions in order of increasing size: S, S$^{2-}$, Cl
cl51133
cl51111
cl51109
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
easy
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the following sets of atoms and ions in order of increasing size: Fe, Fe$^{2+}$, Fe$^{3+}$
cl51111
cl51109
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
easy
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
List these atoms in order of decreasing size: Br, Cl, Ge, K, S.
cl51129
cl51127
cl51125
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
difficult
basics
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Which of the following statements is true regarding atomic radii ?
cl51127
cl51125
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
basics
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Arrange the following monatomic ions in order of increasing atomic radii: P$^{3–}$, Cr$^{6+}$, Ca$^{2+}$, Cl$^{-}$, Ti$^{4+}$.
cl51125
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
difficult
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank each set of ions in order of decreasing size: Ca$^{2+}$, Sr$^{2+}$, Mg$^{2+}$.
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
medium
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the elements in each of the following sets in order of decreasing First Ionization Energy IE$_1$: K, Ca, Rb
cl51121
cl51119
cl51117
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
ionization-enthalphy
medium
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the elements in each of the following sets in order of decreasing First Ionization Energy IE$_1$: K, Ca, Rb
cl51119
cl51117
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
ionization-enthalphy
medium
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the elements in each of the following sets in order of decreasing First Ionization Energy IE$_1$: Sb, Te, Sn
cl51117
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
ionization-enthalphy
medium
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the elements in each of the following sets in order of decreasing First Ionization Energy IE$_1$: Kr, He, Ar
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
ionization-enthalphy
easy
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the set of main group elements in order of decreasing atomic size: $ Sr, Ca, Rb$
cl51113
cl51111
cl51109
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
easy
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the set of main group elements in order of decreasing atomic size: $ Br, Rb, Kr$
cl51111
cl51109
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
easy
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the set of main group elements in order of decreasing atomic size: $K, Ga, Ca$
cl51109
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
easy
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
Rank the set of main group elements in order of decreasing atomic size: $Ca, Mg, Sr$
jeemain
chemistry
inorganic-chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
periodicity
atomic-radius
easy
asked
Jul 23, 2014
by
balaji.thirumalai
1
answer
In which of the following arrangements is the order not according to the property indicated against it?
classification-of-elements-and-periodicity-of-properties
jeemain
chemistry
cbse
class11
easy
periodicity
ionization-enthalphy
ch3
medium
asked
Mar 16, 2014
by
balaji.thirumalai
1
answer
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:
classification-of-elements-and-periodicity-of-properties
jeemain
chemistry
cbse
class11
medium
periodicity
ionization-enthalphy
inorganic-chemistry
ch3
asked
Mar 16, 2014
by
balaji.thirumalai
1
answer
Among the following elements, the one having the highest ionization energy is
classification-of-elements-and-periodicity-of-properties
jeemain
chemistry
cbse
class11
easy
periodicity
ionization-enthalphy
inorganic-chemistry
asked
Mar 16, 2014
by
balaji.thirumalai
1
answer
The formation of the oxide ion $O^{2-}_{(g)} $ requires first an exothermic and then an endothermic step, as shown below:
classification-of-elements-and-periodicity-of-properties
jeemain
cbse
class11
medium
chemistry
periodicity
electron-gain-enthalpy
inorganic-chemistry
electron-affinity
asked
Mar 15, 2014
by
balaji.thirumalai
1
answer
Which of the following elements' atom has the greatest ability to attract electrons?
jeemain
cbse
chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
easy
periodicity
electronegativity
inorganic-chemistry
asked
Mar 15, 2014
by
meena.p
1
answer
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?
jeemain
cbse
chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
easy
periodicity
ionization-enthalphy
inorganic-chemistry
asked
Mar 15, 2014
by
meena.p
1
answer
As atoms of elements in Group 16 are considered in order from top to bottom, the electronegativity of each successive element
jeemain
cbse
chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
easy
periodicity
electronegativity
inorganic-chemistry
asked
Mar 15, 2014
by
meena.p
1
answer
Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity is most closely related to the atoms'
jeemain
cbse
chemistry
class11
ch3
classification-of-elements-and-periodicity-of-properties
easy
periodicity
basics
asked
Mar 15, 2014
by
meena.p
1
answer
Arrange the following in order of increasing ionization energies: Ar, Se, S.
classification-of-elements-and-periodicity-of-properties
jeemain
chemistry
cbse
class11
easy
periodicity
ionization-enthalphy
inorganic-chemistry
ch3
asked
Mar 15, 2014
by
balaji.thirumalai
1
answer
Linus Pauling defined electronegativity as the power of an atom in a molecule to attract electrons. Given the bond disassociation enthalpies, $\varepsilon_{C-C} = 348\; \text{ kJ/mol}, \varepsilon_{C-H} = 412 \; \text{ kJ/mol}, \varepsilon_{H-H} = 436 \; \text{ kJ/mol}$, what is the Pauling elctronegativity of $C$? (Electronegativity of $H$ is $2.1$)
classification-of-elements-and-periodicity-of-properties
jeemain
chemistry
cbse
class11
ch3
medium
periodicity
electronegativity
inorganic-chemistry
asked
Mar 15, 2014
by
balaji.thirumalai
1
answer
Given the following assertion and reason, choose the correct answer:
classification-of-elements-and-periodicity-of-properties
jeemain
chemistry
cbse
class11
ch3
easy
periodicity
electron-gain-enthalpy
inorganic-chemistry
basics
asked
Mar 15, 2014
by
balaji.thirumalai
1
answer
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