Identify the correct statements from the following. (1) The dipole moment of CO 2 and BF 3 is zero. (2) The dipole moment of NF 3 is higher than the dipole moment of NH 3. (3) The dipole moment of HI is lower than the dipole moment of HCl.

Question

Identify the correct statements from the following. (1) The dipole moment of CO 2 and BF 3 is zero. (2) The dipole moment of NF 3 is higher than the dipole moment of NH 3. (3) The dipole moment of HI is lower than the dipole moment of HCl. (A) 1,3 (B) 1,2 (C) 2,3 (D) 1,2,3

Tardigrade Admin · Accepted Answer

1 . The BF 3 molecule has a symmetrical trigonal planar geometry, the moment of any two B - F dipoles is equal in magnitude but opposite in direction to the moment of the BF 3 molecule is zero. Same as CO 2. 2. In NH 3, N is more electronegative than H so, N pulls the electrons from H towards itself so, the direction of moment due to the N - H bonds is in the same direction as that of the lone pair of electrons on nitrogen. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/91bccc7264e44a25d9e148662c355133-.png" /> But in case of NF 3, H - bullet [lone pair] moment is in the opposite direction to the N - F bond moments. Thus, has smaller net dipole moment. 3. ∵ Size of I-atom is more than of Cl-atom and electronegativity of I-atom is less than of Cl-atom. Hence, HI has lower dipole-moment than HCl.

Q. Identify the correct statements from the following. (1) The dipole moment of CO2​ and BF3​ is zero. (2) The dipole moment of NF3​ is higher than the dipole moment of NH3​. (3) The dipole moment of HI is lower than the dipole moment of HCl.

1,3

1,2

2,3

1,2,3

Q. Identify the correct statements from the following.
(1) The dipole moment of $C O_{2}$ and $B F_{3}$ is zero.
(2) The dipole moment of $N F_{3}$ is higher than the dipole moment of $N H_{3}$ .
(3) The dipole moment of $H I$ is lower than the dipole moment of $H Cl$ .