Answer
Verified
478.2k+ views
Hint: Polarization is an effect in which a small charge dense cation attracts the loosely bound electron cloud of the penultimate shell of a large anion and distorts its anionic electron cloud shape. This is known as ion polarization.
Complete step by step answer:
The ability of a cation to distort an anion is known as its polarization power and the tendency of the anion to become polarized by the cation is known as its polarizability. The polarizing power and the polarizability enhances the formation of covalent bonds and is favoured by small size of cation, large size of anion and large charges of cation and anion.
Small size of cation: The smaller the cation is, more is its charge density, and more is the capability of the cation to attract the electrons. Positive charge on a small area increases the charge density of the cation.
Large size of anion: The larger size of anion enhances the polarizability as the outer electrons are more loosely held and can be easily distorted by the cation.
Large charges: The increasing charges increase the electrostatic attractions of the cation for the outer electrons of the anion. Thus, it enhances polarizability.
Ion polarization can change the colour of a compound. This is explained by the Fajan’s rule.
Hence, \[A{g^ + }\] polarises \[B{r^ - }\] and \[{I^ - }\].
Therefore, the correct answer is (A).
Note: Remember that the small cations are found on the top left of the periodic table and large anions are found on the bottom right. Better polarizability requires smaller cation and larger anion.
Complete step by step answer:
The ability of a cation to distort an anion is known as its polarization power and the tendency of the anion to become polarized by the cation is known as its polarizability. The polarizing power and the polarizability enhances the formation of covalent bonds and is favoured by small size of cation, large size of anion and large charges of cation and anion.
Small size of cation: The smaller the cation is, more is its charge density, and more is the capability of the cation to attract the electrons. Positive charge on a small area increases the charge density of the cation.
Large size of anion: The larger size of anion enhances the polarizability as the outer electrons are more loosely held and can be easily distorted by the cation.
Large charges: The increasing charges increase the electrostatic attractions of the cation for the outer electrons of the anion. Thus, it enhances polarizability.
Ion polarization can change the colour of a compound. This is explained by the Fajan’s rule.
Hence, \[A{g^ + }\] polarises \[B{r^ - }\] and \[{I^ - }\].
Therefore, the correct answer is (A).
Note: Remember that the small cations are found on the top left of the periodic table and large anions are found on the bottom right. Better polarizability requires smaller cation and larger anion.
Recently Updated Pages
Which of the following reagents cannot distinguish class 12 chemistry CBSE
Which of the following reagents cannot distinguish class 12 chemistry CBSE
Which of the following reagents cannot distinguish class 12 chemistry CBSE
Which of the following reagents cannot distinguish class 12 chemistry CBSE
Which of the following reagents cannot distinguish class 12 chemistry CBSE
Which of the following reagents cannot distinguish class 12 chemistry CBSE
Trending doubts
Which are the Top 10 Largest Countries of the World?
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
Explain sex determination in humans with the help of class 12 biology CBSE
How much time does it take to bleed after eating p class 12 biology CBSE
Distinguish between asexual and sexual reproduction class 12 biology CBSE
Differentiate between insitu conservation and exsitu class 12 biology CBSE