Advertisements
Advertisements
You are given a very old sample of wood. How will you determine its age?
Concept: undefined >> undefined
What is the stationary phase in Paper Chromatography?
Concept: undefined >> undefined
Advertisements
Why do we see bands separating in column chromatography?
Concept: undefined >> undefined
Select and write the most appropriate alternatives from the given choices.
The angle between the two covalent bonds is minimum in:
Concept: undefined >> undefined
In Ammonia molecule the bond angle is 107° and in water molecule it is 104°35', although in both the central atoms are sp3 hybridized Explain.
Concept: undefined >> undefined
Give a reason for HF is a polar molecule
Concept: undefined >> undefined
Which type of hybridization is present in the ammonia molecule?
Concept: undefined >> undefined
Write the geometry and bond angle present in ammonia.
Concept: undefined >> undefined
F-Be-F is a liner molecule but H-O-H is angular. Explain.
Concept: undefined >> undefined
In the case of bond formation in Acetylene molecule: How many covalent bonds are formed?
Concept: undefined >> undefined
In the case of bond formation in Acetylene molecule: State number of sigma and pi bonds formed.
Concept: undefined >> undefined
In the case of bond formation in Acetylene molecule: Name the type of Hybridization.
Concept: undefined >> undefined
Predict the shape and bond angles in the following molecule:
CF4
Concept: undefined >> undefined
Predict the shape and bond angles in the following molecule:
NF3
Concept: undefined >> undefined
Predict the shape and bond angles in the following molecule:
HCN
Concept: undefined >> undefined
Predict the shape and bond angles in the following molecule:
H2S
Concept: undefined >> undefined
Using data from the Table, answer the following:
| Examples | C2H6 Ethane | C2H4 Ethene | C2H2 Ethyne |
| Structure |
\[\begin{array}{cc} \backslash \phantom{......}/\phantom{.}\\ \ce{—C – C —}\\ /\phantom{......}\backslash\phantom{.}\end{array}\] |
\[\begin{array}{cc} \backslash \phantom{......}/\\ \ce{C \text{=} C}\\ /\phantom{......}\backslash\end{array}\] |
\[\ce{- C ≡ C -}\] |
| Type of bond between carbons | single | double | triple |
| Bond length (nm) | 0.154 | 0.134 | 0.120 |
| Bond Enthalpy kJ mol-1 | 348 | 612 | 837 |
- What happens to the bond length when unsaturation increases?
- Which is the most stable compound?
- Indicate the relationship between bond strength and Bond enthalpy.
- Comment on the overall relation between Bond length, Bond Enthalpy, and Bond strength and stability.
Concept: undefined >> undefined
Complete the flow chart.
| Molecular Formula | Structural Formula | Shape/ Geometry | Bond angle |
| BeCl2 | 180° | ||
| O=C=O | Linear | ||
| C2H2 |
Concept: undefined >> undefined
