Recent questions tagged bond-parameters

The minimum energy required for molecules to enter into chemical reaction is called

asked Apr 4, 2014 by meena.p

1 answer

The dipole moment of $KCl$ is $3.336 \times 10^{-29}$ coulomb meter which indicates that it is a highly polar molecule. The inter atomic distance between $K^+$ and $Cl^{-}$ in this molecule is $2.6 \times 10^{-10}\;m$ Calculate the dipole moment of $KCl$ molecular if there were opposite charges of one fundamental unit located at each nucleus. Calculate percentage ionic character of $KCl$

asked Apr 4, 2014 by meena.p

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calculate the lattice energy of $KI,$ given that enthalphy of (i) sublimation of K is $90\;K\;J mol^{-1}$, (ii) dissociation of $I_2$ to $I^{-}$ is $213\;kJmol^{-1}$ (iii) ionisation of K to $K^{+}$ is $415\;kJ mol^{-1}$ (iv) electron affinity for I to $I^{-}$ is $-294.6 \;KJ\;mol^{-1}$ and $SH_f$ overall is $-327\;kJ\;mol^{-1}$

asked Apr 4, 2014 by meena.p

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The experimental dipole moment of water molecule is $1.84\;D$ . Calculate the bond angle $H-O-H$ in water molecule , if dipole moment of OH bond is $1.5\;D$

asked Apr 4, 2014 by meena.p

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A diatomic molecule has a dipole moment equal to $1.2 \;D$ , If bond length is $1.0\;a^{\circ}$ What fraction of electronic charge 'e' exists on each atom ?

asked Apr 4, 2014 by meena.p

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The half - life period of a first order chemical reaction is $6.93$ minutes. The time required for the completion of $99\%$ of the chemical reaction will be $(\log 2 =0.301)$

asked Apr 3, 2014 by meena.p

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If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process $AB+hr \to AB^ x$ the rate of formation of $AB^x$is directly proportional X :

asked Apr 3, 2014 by meena.p

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The lightening of fire files is :

asked Apr 3, 2014 by meena.p

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One Einstein = N $\times$ quanta of energy where N is :

asked Apr 3, 2014 by meena.p

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Half- life $(t_1)$ of the first order reaction and half-life $(t_2)$ of the second order reaction are equal. Hence ratio of the rate of the rate at te start of the reaction.

asked Apr 3, 2014 by meena.p

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Which of the following hydrocarbons has the lowest dipole moment?

asked Apr 3, 2014 by meena.p

1 answer

The species which contain an odd number of valence electrons and are paramagnetic are

asked Apr 2, 2014 by meena.p

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Which of the following have identical bond order? $(i)\; CN^{-} \\ (ii)\;NO_2^{-} \\ (iii)\;NO^{+} \\ (iv)\; CN^{+}$

asked Apr 2, 2014 by meena.p

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Which of the following conditions apply to resonating structures? (i) Identical arrangements of atoms (ii) Nearly same energy content (iii) Identical number of bonds (iv) Same number of unpaired electrons

asked Apr 2, 2014 by meena.p

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The time for half life period of a certain reaction. A - products is 1 hour when initial concentration of the reactant A is $2.0\; mol\; L^{-1}$, how much time does it take for its concentration to come from $0.50$ to $ 0.25\;mol L^{-1}$ if it is a zero order reaction ?

asked Apr 2, 2014 by meena.p

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Which one of the following oxides is expected to exhibit paramagnetic behaviour ?

asked Apr 2, 2014 by meena.p

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Which of the following molecular is the most polar?

asked Apr 1, 2014 by meena.p

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Arrange the following compounds in order of increasing dipole moment? (I) Toluene (II) m-dichlorobenzene (III) o-dichlorobenzene (IV) P-dichlorobenzene

asked Apr 1, 2014 by meena.p

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Which of the following arrangement of molecules is correct on the basis of their dipole moments?

asked Apr 1, 2014 by meena.p

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What is the percentage ionic character of $KCl$ given the following: The dipole moment of $KCl$ is $3.336 \times 10^{-29} \text{coulomb-meter}$. The interatomic distance between $K^{+}$ and $Cl^{-}$ is $2.6 \times 10^{-10}\;m$.

asked Mar 22, 2014 by balaji.thirumalai

1 answer

Which of these molecules have dipole-dipole forces? $(1) \;CO_2 \quad (2) \; CH_2Cl_2 \quad (3)\; CH_4$

asked Mar 22, 2014 by balaji.thirumalai

1 answer

Polarisation of electrons in acrolein may be written as :

asked Mar 10, 2014 by sreemathi.v

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Which of the following compound will have the highest dipole moment?

asked Mar 10, 2014 by sreemathi.v

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The dipole moment of a hydrogen halide $H-X$ is 1.80 and the bond length is 1.5$A^{\large\circ}$.The percentage of ionic character of H-X bond will be :$(e=4.8\times 10^{-10}$e.s.u)

asked Mar 10, 2014 by sreemathi.v

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Find the bond angle of $H_2S$.If the S-H bond moment is 0.72D and $\mu=0.95D$

asked Mar 10, 2014 by sreemathi.v

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Magnetic moment of $K_3Fe(C_2O_4)_3.3H_2O$ is

asked Mar 10, 2014 by sreemathi.v

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The molecule that will have dipolemoment is

asked Mar 10, 2014 by sreemathi.v

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Which one of the following would require the largest amount of energy to cause dissociation

asked Mar 10, 2014 by sreemathi.v

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Which of the following is the correct order of dipole moment value?

asked Mar 10, 2014 by sreemathi.v

1 answer