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Isoelectronic Species

During polari...

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During polarization of ion distortion of the ion that is, attraction of electron cloud towards cation happens due to what reason ??

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Q. The properties of most of the ionic solids deviate from their ideal ionic character because the lattice undergoes some distortion. Cations are usually smaller than anions and have a higher effective nuclear charge. The outer electron cloud in a cation is more firmly held than in an anion. The loose electron cloud of an anion, when attracted by the electron cloud of a cation, gets distorted. This phenomenon is known as polarization. Due to this phenomenon, the electron cloud of an anion shifts towards the cation which decreases both the magnitude of positive charge on the cation and the negative charge on the anion. In other words, covalent character develops in the ionic bond.

Which of the following is an ionic compound?

Q. Polarization of an anion is distortion of its electron cloud by an adjacently placed cation. Which of the following statement is correct?

Q. Polarization of electron cloud of cation is less than anion because ______.

Q. Assertion :Among isoelectronic species, the cation with the greater positive charge will have a smaller radius. Reason: Greater the attraction of the electrons to the nucleus, smaller is the size of atom/ion.

Q. Assertion :When an electric current is passed through an aqueous solution of sodium chloride, sodium ions move towards cathode and chloride ions move towards anode. Reason: Cathode is a negatively charged electrode and therefore attracts

N A + i o n s

. Anode is a positively charged electrode and therefore attracts

C l -

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Isoelectronic Species

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