In which of the following molecules / ions are all the bond angles not equal?
(1)
(2)
(3)
(4)
No S-S bonds are present in?
1. \(S_{2}O_{3}^{2-}\)
2. \(S_{2}O_{4}^{2-}\)
3. \(S_{2}O_{5}^{2-}\)
4. \(S_{2}O_{7}^{2-}\)
What is the correct order from the weakest to the strongest carbon-oxygen bond for the following species?
(1)
(2)
(3)
(4)
According to Molecular orbital theory which of the following statement is incorrect?
(1) LUMO level for molecule is orbital.
(2) In molecules both the bonds are bonds.
(3) is paramagnetic but is diamagnetic.
(4) In ion there is one and two bonds.
Match the ionization processes listed in column – I with the changes observed as listed in
column-II. For this use the codes given below:
Column- I Column - II
(a) (p) Bond order increases and magnetic property is changed.
(b) (q) Bond order decreases and magnetic property is not changed.
(c) (r) Bond order increases and magnetic property is not changed.
(d) (s) Bond order decreases and magnetic property is changed.
Note : Here change in magnetic property refers to change from diamagnetic to paramagnetic
or paramagnetic to diamagnetic.
a b c d
1. s q p r
2. s p q r
3. r q s p
4. p s q r
Arrange the following molecules from most to least polar.
(1) III>V>II > IV=I
(2) II>IV>III>IV>I
(3) III>II>V>IV>I
(4) V>III>II>IV=I
Which of the following statements is correct?
1. COH is less acidic than SiOH.
2. Like CO, its analogue of Si is not stable.
3. In phosgene, C-O bond length is longer than expected while C-Cl bond length is shorter.
4. All of these
The boiling point of is higher than that of because :
(1) The dipole moment of is greater than that of
(2) forms hydrogen bonds.
(3) has higher molecular mass than that of
(4) is more ionic than
Assertion : Compounds of ions having an ionic radius of 116 pm are move covalent in character
than those of ions with almost identical size (114 pm) and the same charge.
Reason : For two ions of the same size and charge, one with an (n-1) electronic configuration
will be more polarizing than a cation with an (n-1) (n-1) electronic configuration.
Assertion : In tetrahedral hybridisation i.e., in hybridisation all p-orbitals are involved and no
p-orbital is left for coming with -bonds.
Reason : Central atom can not form double bonds in the molecules or species having hybridisation.