Which of the following is not a correct statement?
(1) The electron-deficient molecules can act as Lewis acids
(2) The canonical structures have no real existence
(3) Every AB5 molecule does, in fact, have square pyramid structure
(4) Multiple bonds are always shorter than corresponding single bonds
The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic mass 16 is :
1. 2
2. 3
3. 4
4. 1
Which of the following is not isostructural with SiCl4?
(a) SCl4 (b) (c) (d)
Least stable hydride is:
(1) stannane
(2) silane
(3) plumbane
(4) germane
Correct order of strength of H-bond in the following compounds is :
(1)
(2)
(3)
(4)
Molecule having non-polar as well as polar bonds but the molecule as a whole is polar:
(a)
(b)
(c)
(d)
Choose the correct statement regarding molecule:
1. It does not contain a plane of symmetry
2.
3. Lone pair has greater than 33.3% s-character
4. Central atom used one d-orbital in bonding.
Which of the following compounds can form H-bonding with each other?
(a)
(b) Phenol and
(c)
(d)
Which of the following compound is planar and non-polar?
(1)
(2)
(3)
(4)
The incorrect statement(s) regarding species is:
(1) If electronegativity of surrounding element 'X' is less than 2.5, then central carbon atom used almost 33% s-character in their hybrid bonding orbitals
(2) If electronegativity of surrounding element 'X' is more than 2.5, then central carbon atom used almost 25% s-character in their hybrid bonding orbitals
(3) If 'X' is 'F', then species should be polar and pyramidal
(4) If 'X' is H, then species should be polar and planar