Recent questions tagged inorganic-chemistry

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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When XeF$_4$ reacts with water, which of the following are possible product(s) that can be formed? Xe, HF, XeO$_3$, XeOF$_3$, XeO$_4$, O$_3$.

asked Jul 27, 2014 by balaji.thirumalai

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Match the following:

asked Jul 27, 2014 by balaji.thirumalai

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Xe$_4$ and Xe$_6$ are expected to be:

asked Jul 27, 2014 by balaji.thirumalai

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The structure of XeO$_3$ is

asked Jul 27, 2014 by balaji.thirumalai

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Why is argon used in arc welding?

asked Jul 27, 2014 by balaji.thirumalai

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Which of the following regarding Helium is incorrect?

asked Jul 27, 2014 by balaji.thirumalai

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The number of water of crystallization in Borax is

asked Jul 27, 2014 by thanvigandhi_1

1 answer

In Borax, the number of -OH group attached to boron atoms is

asked Jul 27, 2014 by thanvigandhi_1

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In the reaction $H_3BO_3$$ _{\overrightarrow{375k}} A$$ _{\overrightarrow{475k}} B$$ _{\overrightarrow{red\: heat}} C$ The compounds A, B and C respectively are

asked Jul 27, 2014 by thanvigandhi_1

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Borax has the molecular formula

asked Jul 27, 2014 by thanvigandhi_1

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Which of the following statement is correct ?

asked Jul 27, 2014 by thanvigandhi_1

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Which of the following statement is not correct ?

asked Jul 27, 2014 by thanvigandhi_1

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Which of the following statement is incorrect ?

asked Jul 27, 2014 by thanvigandhi_1

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Heating of diborane with excess of ammonia to a high temperature yields

asked Jul 27, 2014 by thanvigandhi_1

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Chrome alum is

asked Jul 26, 2014 by thanvigandhi_1

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Heating of $Al_2(SO_4)_3$ gives

asked Jul 26, 2014 by thanvigandhi_1

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Which of the following alloys does not contain aluminium ?

asked Jul 26, 2014 by thanvigandhi_1

1 answer

Which of the following statements regarding the structure aluminium chloride is correct ?

asked Jul 25, 2014 by thanvigandhi_1

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The chief ore for the extraction of aluminium is

asked Jul 25, 2014 by thanvigandhi_1

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Which of the following minerals does not contain aluminium ?

asked Jul 25, 2014 by thanvigandhi_1

1 answer

The elements $_{30}Zn,_{48}Cd$ and $_{80}Hg$ belong to

asked Jul 25, 2014 by sreemathi.v

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Which of the following is metaboric acid ?

asked Jul 25, 2014 by thanvigandhi_1

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The atomic number of In is 49.It belongs to

asked Jul 25, 2014 by sreemathi.v

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An element X belongs to Group 16 and $5^{th}$ period.Its atomic number is

asked Jul 25, 2014 by sreemathi.v

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Which of the following is boric acid ?

asked Jul 25, 2014 by thanvigandhi_1

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Which of the following statements regarding Boron is not correct ?

asked Jul 25, 2014 by thanvigandhi_1

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The atomic numbers of elements of the lanthanide series lie in the range of

asked Jul 25, 2014 by sreemathi.v

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Which of the following statements regarding boron is not correct ?

asked Jul 25, 2014 by thanvigandhi_1

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The total number of elements in Groups 8 to 10 of the periodic table is

asked Jul 25, 2014 by sreemathi.v

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