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- 1. Multiple Choice
The elevtrovalence is thus __(a)__ to the number of unit charge on __(b)__ ?
a : half ; b : stable atom
a : equal ; b : ion
a : equal ; b : anion
- 2. Multiple Choice
Hybrid orbitals are more stable bond than atomic orbitals
True
False
- 3. Multiple Choice
Lewis postulated that atoms the noble octet when they are linked by _____ .
Ionic bonds
Covalent bonds
Chemical bonds
- 4. Multiple Choice
In periodic table, the highly electronegative halogens and the highly electropositive alkali metals are separated by ____ .
Actinoids and lanthanides
Noble gases
d- block elements
- 5. Multiple Choice
In which of the following orbitals atoms do not go in excited state?
BeF₂
BCl3
CH₄
NH3
- 6. Multiple Choice
Which excited state of Boron (B) in BCl3 participate to form hybridised orbitals before reacting with Chlorine (Cl) ?
3
1
2
None of the above
- 7. Multiple Choice
Find out total number of of bond pair and lone pair in XeF3+
LP-2 BP-3
LP-3 BP-2
LP-0 BP-0
- 8. Multiple Choice
Geometry having ____ Repulsion b/w electron pair is most suitable electronic geometry.
Minimum
Maximum
Neutral
- 9. Multiple Choice
State the electronic geometry , Bond angle and Molecular shape of SO2 Molecule
Tetrahedral ,109.5°, Trigonal pyramidal
Trigonal planar ,120°, Trigonal planar
Trigonal planar , less than 120°, Angular/Bent
None of the above
- 10. Multiple Choice
A-3 , B-2 , C-4 , D-1
A-1 , B-2 , C-3 , D-4
A-4 , B-1 , C-2 , D-3
None of the above
- 11. Multiple Choice
A-5 , B-4 , C-3 , D-2 , E-4
A-5 , B-3 , C-3 , D-2 , E-1
A-5 , B-3 , C-4 , D-1 , E-2
None of the above
- 12. Multiple Choice
Carbon can make which of the following hybridisation
sp³
sp²
sp
All of the above
- 13. Multiple Choice
In which of the above the valence d-orbital participate in hybridisation ?
1
2
Both
None of the above
- 14. Multiple Choice
Why NH3 has distorted shape? Choose the most appropriate option:
Because nitrogen makes three bonds only
Because of presence of lone pair
None of the above
- 15. Multiple Choice
Lewis pictured an atom in terms of a _____
Stable Kernel
Positively charged Kernel
Negatively charged Kernel
- 16. Multiple Choice
The negative and positive ions are stabilised by ____ .
Electrostatic attraction
Electrostatic repulsion
Chemical bonds
- 17. Multiple Choice
In PO43– ion the formal charge on the oxygen atom of P–O bond is
+1
-1
+0.75
-0.75
- 18. Multiple Choice
In NO3– ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are
2,2
3,3
1,3
4,0
- 19. Multiple Choice
Which of the following species has tetrahedral geometry?
BH4–
NH2–
CO32–
H3O+
- 20. Multiple Choice
The molecular formula of the compound formed from B and C will be
BC
BC3
B2C
BC2
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