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Chemical Bonding and Molecular Structure · Question 104

AIPMT 2001MCQEasy📈 Topic in 75% papers+4−1
1

In which of the following bond angle is maximum ?

  1. NH3
  2. NH4+
  3. PCl3
  4. SCl2

Answer

(2) NH4+

Solution

NH4+: 4 bond pairs, no lone pair ⇒ regular tetrahedron ⇒ bond angle 109 28'.

NH3: 3 bond pairs + 1 lone pair ⇒ lone pair–bond pair repulsion squeezes the angle to 107 .

PCl3: 1 lone pair on P ⇒ bond angle about 100 .

SCl2: 2 lone pairs on S ⇒ bond angle about 103 .

∴ The bond angle is maximum in NH4+.

Answer: (2)

AIPMT 2001

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2

In X-H Y, X and Y both are electronegative elements. Then

  1. electron density on X will increase and on H will decrease
  2. in both electron density will increase
  3. in both electron density will decrease
  4. on X electron density will decrease and on H will increase.
AIPMT 2001
3

d - p bond present in

  1. CO32-
  2. PO43-
  3. NO3-
  4. NO2-
AIPMT 2000
4

Right order of dissociation energy N2 and N2+ is

  1. N2 > N2+
  2. N2 = N2+
  3. N2+ > N2
  4. none
AIPMT 2000
5

Which species does not exhibit paramagnetism?

  1. N2+
  2. O2-
  3. CO
  4. NO
AIPMT 2000
6

Which compound forms linear polymer due to H-bond?

  1. H2O
  2. NH3
  3. HF
  4. HCl
Out of syllabusAIPMT 2000

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