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Practice each question, then open the answer or worked solution.
Isostructural species are those which have the same shape and hybridisation.
Among the given species, identify the isostructural pairs.
Option (ii) is the answer.
Polarity in a molecule and hence the dipole moment depends primarily on
electronegativity of the constituent atoms and shape of a molecule. Which of
Does the following have the highest dipole moment?
Option (iii) is the answer.
The types of hybrid orbitals of nitrogen in NO2+, NO3- and NH4+respectively are expected to be
(i) sp, sp3 and sp2
(ii) sp, sp2 and sp3
(iii) sp2, sp and sp3
(iv) sp2, sp3 and sp
Option (ii) is the answer.
Hydrogen bonds are formed in many compounds e.g., H2O, HF, NH3. The boiling point of such compounds depends to a large extent on the strength of hydrogen bond and the number of hydrogen bonds. The correct decreasing order of the boiling points of the above compounds is :
Option (ii) is the answer.
In PO43- ion, the formal charge on the oxygen atom of P–O bond is
(i) + 1
(ii) – 1
(iii) – 0.75
(iv) + 0.75
Option (ii) is the answer.
In NO3-ion, the number of bond pairs and lone pairs of electrons on the nitrogen
atom is
(i) 2, 2
(ii) 3, 1
(iii) 1, 3
(iv) 4, 0
Option (iv) is the answer.
Which of the following species has tetrahedral geometry?
Option (i) is the answer.
Number of π bonds and σ bonds in the following structure is–
(i) 6, 19
(ii) 4, 20
(iii) 5, 19
(iv) 5, 20
Option (iii) is the answer.
Which molecule/ion out of the following does not contain unpaired electrons?
Option (iii) is the answer.
In which of the following molecules/ions all the bonds are not equal?
Option (iii) is the answer.