Which of the following statements is false?
H2 molecule has 1σ bond
Acetylene molecule has 3σ bonds and 3Π bonds
HCl molecule has 1σ bond
Water molecule has 2σ bonds and two lone pairs
N2 and O2 are converted to monopositive cation and respectively. Which is incorrect?
In , the N-N bond weakened.
In the bond order increases
In paramagnetism decreases
becomes diamagnetic
A netural molecule XF3 has a zero dipole moment. The element X is most likely
chlorine
boron
nitrogen
carbon
Among the following species, identify the pair having same bond order CN-, O, NO+, CN+
CN- and O
O and NO+
CN- and NO+
CN- and CN+
The shape of XeF4 molecule and hybridisation of xenon in it are
tetrahedral and sp3
square planar and dsp2
square planar and sp3d2
octahedral and sp3d2
Match List-I and List-II and choose the correct matching codes.
List - I | List - II |
A. [Ni(CN)4]2- | 1. Ti4+ |
B. CHlorophyll | 2. sp3; paramagentic |
C. Ziegler- Natta catalyst | 3. non-planar |
D. [NiCl4]2- | 4. Mg2+ |
E. Deoxyhaemoglobin |
5. Planar 6. dsp2; diamagentic |
A - 6; B - 4; C - 1; D - 2; E - 3
A - 2; B - 4; C - 1; D - 6; E - 3
A - 2; B - 4; C - 1; D - 6; E - 5
A - 6; B - 4; C - 1; D - 2; E - 5
A.
A - 6; B - 4; C - 1; D - 2; E - 3
Among the given options, option a is the correct one.
a. [Ni(CN)4]2-
Ni(28) = [Ar] 3d8 4s2
Ni2+ = [Ar] 3d8, 4s
Since, CN- is a strong field ligand, it causes pairing of electrons.
[Ni(CN)4]2- =
b. Chlorophyll consists of Mg2+ ion.
c. Zeigler-Natta catalyst is Ti4+ + (C2H5)3Al.
d. [NiCl4]2-
In this case, Cl- is a weak field ligand, so does not pairing. Hence,
[NiCl4]2- =
Due to the presence of unpaired electrons, it is paramagentic.
e. Deoxyhaemoglobin is non-planar while oxyhaemoglobin is planar.
In which of the following species, all the three types of hybrid carbons are present ?
CH2=C=CH2
CH3-CH=CH-CH
CH3-C≡C-CH
CH3-CH=CH-CH
The incorrect statement/s among the following is/are
I. NCl5, does not exist while PCl5, does.
II. Lead prefers to form tetravalent compounds.
III. The three C-O bonds are not equal in the carbonate ion.
IV. Both O+2 and NO are paramagentic
I, III and IV
I and IV
II and III
I and III