Recent questions in Chemistry

Which of the following orders regarding halogens is not true?

asked Jul 28, 2014 by sreemathi.v

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Which of the following orders regarding the boiling point of halogens is true?

asked Jul 28, 2014 by sreemathi.v

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Which of the following halogens does not show positive oxidation states?

asked Jul 28, 2014 by sreemathi.v

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Which of the following statements regarding halogens is not true?

asked Jul 28, 2014 by sreemathi.v

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Which of the following forms the most basic 0.1M solution?

asked Jul 28, 2014 by sreemathi.v

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Which of the following molecules is not paramagnetic?

asked Jul 28, 2014 by sreemathi.v

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The anhydride of $HClO_4$ is

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Which of the interhalogens is unstable?

asked Jul 28, 2014 by sreemathi.v

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Which of the following is not correct?

asked Jul 28, 2014 by sreemathi.v

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Which of the following statements is not correct?

asked Jul 28, 2014 by sreemathi.v

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Which of the following statements is not correct?

asked Jul 28, 2014 by sreemathi.v

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The strength of halogen acids in water follows the order

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Which of the following reactions is quite violent in nature?

asked Jul 28, 2014 by sreemathi.v

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Which of the halogen is most abundant in the earth's crust?

asked Jul 28, 2014 by sreemathi.v

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Which of the following does not contain fluorine?

asked Jul 28, 2014 by sreemathi.v

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Which of the following orders of melting point of hydrides of halogens is correct?

asked Jul 28, 2014 by sreemathi.v

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Which of the following statements regarding aluminium is not correct ?

asked Jul 28, 2014 by thanvigandhi_1

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Which of the following halogens does not exhibit positive oxidation state?

asked Jul 28, 2014 by sreemathi.v

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Which of the following is the only noble gas not to occur in the free state in the atomosphere, air, in oute space or in natural gases etc.

asked Jul 28, 2014 by balaji.thirumalai

1 answer

Which of the following orders of bond dissociation enthalpy of halogens is correct?

asked Jul 28, 2014 by sreemathi.v

1 answer

Which of the following mixtures is used by divers in their breathing apparatus for respiration purposes?

asked Jul 28, 2014 by balaji.thirumalai

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Which of the following statements about the atomic and physical properties of noble-gases are incorrect?

asked Jul 28, 2014 by balaji.thirumalai

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Which of the following orders of electron affinities of halogen is correct?

asked Jul 28, 2014 by sreemathi.v

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Arrange the noble gases in order of increasing Atomic Mass.

asked Jul 28, 2014 by balaji.thirumalai

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Which of the following is radioactive halogen?

asked Jul 28, 2014 by sreemathi.v

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What is the Poisson's ratio for the noble gases?

asked Jul 28, 2014 by balaji.thirumalai

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The atomic number of astatine which belongs to six period is

asked Jul 28, 2014 by sreemathi.v

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Which of the following statements about the properties of Helium is incorrect?

asked Jul 28, 2014 by balaji.thirumalai

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The number of halogens known as so far is

asked Jul 28, 2014 by sreemathi.v

1 answer

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)

asked Jul 28, 2014 by sreemathi.v

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According to Pauling,the electronegativity difference between two atoms A and B is directly proportional to (where $\varepsilon$ represents bond enthalpy)

asked Jul 28, 2014 by sreemathi.v

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The correct order of Pauling electronegativity values for Li,Na and K is

asked Jul 28, 2014 by sreemathi.v

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The Pauling electronegativity for H is

asked Jul 28, 2014 by sreemathi.v

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Which of the following statements regarding electropositive nature of elements in a period is correct?

asked Jul 28, 2014 by sreemathi.v

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Which of the following elements is most electropositive?

asked Jul 28, 2014 by sreemathi.v

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

asked Jul 28, 2014 by sreemathi.v

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In the periodic table,electronegativity of elements

asked Jul 28, 2014 by sreemathi.v

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With the increase in atomic number in a period

asked Jul 28, 2014 by sreemathi.v

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Which of the following elements is expected to have maximum value of Pauling electronegativity?

asked Jul 28, 2014 by sreemathi.v

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The Pauling electronegativity value of fluorine is

asked Jul 28, 2014 by sreemathi.v

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The correct order of Pauling electronegativity is

asked Jul 28, 2014 by sreemathi.v

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The electronegativity of the following elements increases in the order

asked Jul 28, 2014 by sreemathi.v

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Electron affinities of Li,Na and K follow the order

asked Jul 28, 2014 by sreemathi.v

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Electron affinities of Be,B and Al follow the order

asked Jul 28, 2014 by sreemathi.v

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Electron affinities of C,Si and Ge follow the order

asked Jul 28, 2014 by sreemathi.v

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Which of the following will have the lowest value of electron affinity?

asked Jul 28, 2014 by sreemathi.v

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

asked Jul 28, 2014 by sreemathi.v

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Which of the following elements has zero electron affinity?

asked Jul 28, 2014 by sreemathi.v

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The correct order of electron affinity is

asked Jul 28, 2014 by sreemathi.v

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The element with atomic number 105 is known as

asked Jul 28, 2014 by sreemathi.v

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