What are polar molecules and non-polar molecules? Give examples of both.
(N/A) $1$. Polar Molecules: $A$ molecule in which the center of positive charge and the center of negative charge do not coincide is called a polar molecule. These molecules possess a permanent electric dipole moment. Examples: $HCl$,$H_2O$,$NH_3$.
$2$. Non-polar Molecules: $A$ molecule in which the center of positive charge and the center of negative charge coincide is called a non-polar molecule. These molecules have zero permanent electric dipole moment. Examples: $O_2$,$H_2$,$CO_2$.
$2$. Non-polar Molecules: $A$ molecule in which the center of positive charge and the center of negative charge coincide is called a non-polar molecule. These molecules have zero permanent electric dipole moment. Examples: $O_2$,$H_2$,$CO_2$.
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Choose the correct relation between polarisation $P$ and electric susceptibility $\chi_{e}$ of a dielectric material. ($E =$ electric field)
$Assertion \; (A)$: Non-polar materials do not have any permanent dipole moment.
$Reason \; (R)$: When a non-polar material is placed in an electric field,the centre of the positive charge distribution of its individual atom or molecule coincides with the centre of the negative charge distribution.
In the light of the above statements,choose the most appropriate answer from the options given below:
$Reason \; (R)$: When a non-polar material is placed in an electric field,the centre of the positive charge distribution of its individual atom or molecule coincides with the centre of the negative charge distribution.
In the light of the above statements,choose the most appropriate answer from the options given below:
Assertion : In the absence of an external electric field,the dipole moment per unit volume of a polar dielectric is zero.
Reason : The dipoles of a polar dielectric are randomly oriented.
Reason : The dipoles of a polar dielectric are randomly oriented.
Define dielectric constant.
Medium
View SolutionGiven below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Net dipole moment of a polar dielectric substance is zero in the absence of an external electric field.
Reason $(R)$: In the absence of an external electric field,the different permanent dipoles of a polar dielectric substance are oriented in random directions.
In the light of the above statements,choose the most appropriate answer from the options given below.
Assertion $(A)$: Net dipole moment of a polar dielectric substance is zero in the absence of an external electric field.
Reason $(R)$: In the absence of an external electric field,the different permanent dipoles of a polar dielectric substance are oriented in random directions.
In the light of the above statements,choose the most appropriate answer from the options given below.
DifficultJEE MAIN 2025
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