Q1. Which one of the following is the shape of BrF5?
Octahedral
Square planar
Square pyramidal
Trigonal bipyramidal
Q2. Which one of the following is the basis of VSEPR theory?
Number of bonded pairs of electrons around central atom
Number of lone pairs of electrons around central atom
Number of bonded and lone pairs of electrons around central atom
Number of hybrid orbital atoms of central atom
Q3. Which one of the following represents the correct combination of shape and hybridisation of PF5?
Square pyramidal, dsp3
Trigonal bipyramidal,dsp3
Square pyramidal, sp3d
Trigonal bipyramidal, sp3d
Q4. Which one of the following conditions is not correct for the combination of atomic orbitals to form molecular orbitals?
The combining atomic orbitals must have same or nearly the same energy.
The combining atomic orbitals must show lateral overlap with each other.
The combining atomic orbitals must have the same symmetry about the molecular axis.
The combining atomic orbitals must overlap to the maximum extent.
Q5. Which one of the following represents the correct order of bond angle among H2O, H2Te, H2Se, H2S?
H2O> H2S> H2Se> H2Te
H2S> H2Se> H2O> H2Te
H2O> H2Se> H2S> H2Te
H2Te> H2O> H2S> H2Se
Q6. The covalent radius of C atom is 0.77 Å and that of H atom is 0.37 Å. What is the internuclear distance between C and H atoms in CH4 molecule?
1.14 Å
1.20 Å
1.25 Å
1.41 Å
Q7. The bond distance in Cl2 molecule is 1.98 Å. What will be its covalent radius?
0.99 Å
1.00 Å
0.98 Å
1.10 Å
Q8. From each pair given below identify the ion which is larger in size (Co2+,Co3+) (Fe2+,Zn2+) (Na+,F-) ( O2-,S2-)
Co2+, Zn2+, F-, S2-
Co3+, Fe2+, Na+, S2-
Co2+, Fe2+, F-, S2-
Co3+, Zn2+, Na+, O2-
Q9. Which ion is isoelectronic with F-?
Li+
Cl-
Ca2+
O2-
Q10. Which one among the following molecules has a linear structure?
Hydrogen sulphide
Sulphur dioxide
Ozone
Hydrogen cyanide
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