JEE Main Chemical Bonding & Molecular Structure Practice Questions With Solutions

The correct increasing order for bond angles among ${\mathrm{BF}}_3,{\mathrm{PF}}_3$BF_{3} , PF_{3} and ${\mathrm{ClF}}_3$ClF_{3} is :

In which one of the following pairs the central atoms exhibit ${\mathrm{sp}}^2$sp^{2} hybridization ?

The shape of carbocation is :

When ${\psi }_{\mathrm{A}}$\psi_{A} and ${\psi }_{\mathrm{B}}$\psi_{B} are the wave functions of atomic orbitals, then ${\sigma }^{\ast }$\sigma^{*} is represented by :

Match List I with List II

Choose the correct answer from the options given below:

Match List I with List II

Choose the correct answer from the options given below:

Match List I with List II

Choose the correct answer from the options given below:

Match List I with List II.

Choose the correct answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : ${\mathrm{NH}}_3$NH_{3} and ${\mathrm{NF}}_3$NF_{3} molecule have pyramidal shape with a lone pair of electrons on nitrogen atom. The resultant dipole moment of ${\mathrm{NH}}_3$NH_{3} is greater than that of ${\mathrm{NF}}_3$NF_{3}.

Reason (R) : In ${\mathrm{NH}}_3$NH_{3}, the orbital dipole due to lone pair is in the same direction as the resultant dipole moment of the $\mathrm{N}-\mathrm{H}$N - H bonds. $\mathrm{F}$F is the most electronegative element.

In the light of the above statements, choose the correct answer from the options given below :

Number of $\sigma$\sigma and $\pi$\pi bonds present in ethylene molecule is respectively :