Important Questions Collection
Unit One: Chemical Bonding and Shape of Molecules
Chemistry | Science Class 12
Short Questions:
- Predict the structure of methane based on hybridization. [HSEB 2052]
- Identify the hybridization of the indicated atom in each of the following molecules. [HSEB 2053]
i) Be in BeF2
ii) B in BF3
iii) N in NH3 - Draw the shapes of sp and sp2 hybrid orbitals. [2056]
- How do you predict the molecular geometry of NH3 based on VSEPR model? [HSEB 2057]
- Draw the orbital picture of ethyne indicating sigma and pi bond. [HSEB 2058]
- Draw the orbital picture of ethene. [HSEB 2059]
- How do you interpret that all four C-H bonds of methane are identical. [HSEB 2060]
- The bond angle is the central atom in NF3 is 103° where as in BF3 is 120°. What factor accounts for the difference in bond angles? [HSEB 2061]
- How do you predict the molecular geometry of NH3 based on VSEPR model? [HSEB 2061]
- Define hybridization. Draw the orbital picture of hydrocarbon showing tetrahedral structure. [HSEB 2063]
- Predict the mode of hybridization in (i) C of C2H4 (ii) B of BF3. [2065]
- What is the mode of hybridization of the central atom whose molecular geometry is tetrahedral? And, give an example of it. [HSEB 2066]
- Mention one examples of each. [HSEB 2067]
i) Tetrahedral hybridization
ii) Trigonal hybridization
iii) Diagonal hybridization - Write any two important characters of tetrahedral hybridization. [HSEB 2068]
Long questions:
- What do you understand by sp2 hybridization? Using any example explain the molecular geometry involved. [HSEB 2054]
- Explain the state of hybridization in ethyne molecule. [HSEB 2055]
- Using VSEPR theory, explain the shapes of BeF2 and BF3. [HSEB 2056]
- Write short notes on VSEPR theory. [HSEB 2055, 2061]
- Why is bond angle in: (a) PH3 is less then NH3 (b) F2O is less than H2O?
- Explain the state of hybridization in:
(i) Ethane molecule
(ii) Ethene molecule
(iii) Ethyne molecule
(iv) Methane molecule