1
MCQ (Single Correct Answer)

AIPMT 2002

In NO3$$-$$ ion number of bond pair and lone pair of electrons on nitrogen atom are
A
2, 2
B
3, 1
C
1, 3
D
4, 0

Explanation

$${O^ - }\hbox{---}\mathop N\limits^{\mathop \uparrow \limits^O } = O$$

In NO3- ion, nitrogen has 4 bond pair of electrons and no lone pair of electrons.
2
MCQ (Single Correct Answer)

AIPMT 2002

Which of the following has p$$\pi $$ $$-$$ d$$\pi $$ bonding?
A
NO3$$-$$
B
SO32$$-$$
C
BO33$$-$$
D
CO32$$-$$

Explanation

Electronic structure of S atom in excited state


In 'S' unhybride d- orbital is present, which will involved in bond formation with oxygen atom.

In oxygen two unpaired p- orbital is present in these one is involved in $$\sigma $$ bond formation while other is used in $$\pi $$ bond formation.

So, in SO32$$-$$, p$$\pi $$ $$-$$ d$$\pi $$ bonding present.
3
MCQ (Single Correct Answer)

AIPMT 2001

In X - H --- Y, X and Y both are electronegative elements. Then
A
electron density on X will increase and on H will decrease
B
in both electron density will increase
C
in both electron density will decrease
D
on X electron density will decrease and on H increases.

Explanation

As X and Y both are electronegative elements thus both attracts the electron density from H thus, electron density on H decreases and on X it increases.
4
MCQ (Single Correct Answer)

AIPMT 2001

In which of the following bond angle is maximum ?
A
NH3
B
NH4+
C
PCl3
D
SCl2

Explanation

Bond angle is maximum in NH4+ tetrahedral molecule with bond angle 109°.

EXAM MAP

Joint Entrance Examination

JEE Advanced JEE Main

Medical

NEET

Graduate Aptitude Test in Engineering

GATE CE GATE ECE GATE ME GATE IN GATE EE GATE CSE GATE PI