PCl5 exists but NCl5 does not because:
1. Nitrogen has no vacant d-subshells .
2. NCl5 is unstable .
3. Nitrogen atom is much smaller than p .
4. Nitrogen is highly inert .
The bond angle between two hybrid orbitals is 105°. The % s character in orbital is-
1. | Between 30-31% | 2. | Between 9- 12% |
3. | Between 25 -26% | 4. | Between 22-23% |
Which bond angle would result in the maximum dipole moment for the triatomic molecule XY2
1. 90°
2. 120°
3. 150°
4. 180°
The strongest hydrogen bond present among the following is-
1. O—H‐‐‐S
2. S—H‐‐‐O
3. F—H‐‐‐F
4. F—H‐‐‐O
In which of the process, the bond order increases and magnetic behaviour changes?
(a) N2→N2+
(b) C2→C2+
(c) NO→NO+
(d) O2→O2+
In piperidine "N" atom has hybridization:
1. sp
2. sp2
3. sp3
4. dsp2
The coordination geometry around and hybridization of N and B atoms in a 1:1 complex of NH3 and BF3 is:
(1) N: tetrahedral, sp3; B: tetrahedral, sp3
(2) N: pyramidal, sp3; B: pyramidal, sp3
(3) N: pyramidal, sp3; B: planar, sp2
(4) N: pyramidal, sp3; B: tetrahedral, sp3
Assuming 2s-2p mixing is NOT operative, the paramagnetic species among the following is :
(1) Be2
(2) B2
(3) C2
(4) N2
When O2 is adsorbed on a metallic surface, electron transfer occurs from the ,metal to O2. The wrong statements(s) regarding this adsorption is (are):
(1) O2 is physisorbed
(2) Heat is released
(3) Occupancy of π*2p of O2 is increased
(4) Bond length of O2 is increased
Born Haber cycle is used to determine:
(1) lattice energy
(2) electron affinity
(3) ionization energy
(4) either of them