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HSC Science (General) 11th Standard - Maharashtra State Board Question Bank Solutions

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In the case of bond formation in Acetylene molecule: State number of sigma and pi bonds formed.

[5] Chemical Bonding
Chapter: [5] Chemical Bonding
Concept: undefined >> undefined

In the case of bond formation in Acetylene molecule: Name the type of Hybridization.

[5] Chemical Bonding
Chapter: [5] Chemical Bonding
Concept: undefined >> undefined

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Define Bond Enthalpy

[5] Chemical Bonding
Chapter: [5] Chemical Bonding
Concept: undefined >> undefined

Define Bond Length

[5] Chemical Bonding
Chapter: [5] Chemical Bonding
Concept: undefined >> undefined

Predict the shape and bond angles in the following molecule:

CF4

[5] Chemical Bonding
Chapter: [5] Chemical Bonding
Concept: undefined >> undefined

Predict the shape and bond angles in the following molecule:

NF3

[5] Chemical Bonding
Chapter: [5] Chemical Bonding
Concept: undefined >> undefined

Predict the shape and bond angles in the following molecule:

HCN

[5] Chemical Bonding
Chapter: [5] Chemical Bonding
Concept: undefined >> undefined

Predict the shape and bond angles in the following molecule:

H2S

[5] Chemical Bonding
Chapter: [5] Chemical Bonding
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
  1. What happens to the bond length when unsaturation increases?
  2. Which is the most stable compound?
  3. Indicate the relationship between bond strength and Bond enthalpy.
  4. Comment on the overall relation between Bond length, Bond Enthalpy, and Bond strength and stability.
[5] Chemical Bonding
Chapter: [5] Chemical Bonding
Concept: undefined >> undefined

Complete the flow chart.

Molecular Formula Structural Formula Shape/ Geometry Bond angle
BeCl2     180°
  O=C=O Linear  
C2H2      
[5] Chemical Bonding
Chapter: [5] Chemical Bonding
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Write the formula to calculate the bond order of molecule.

[5] Chemical Bonding
Chapter: [5] Chemical Bonding
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Choose the correct option.

The size of colloidal particles lies between ______.

[11] Adsorption and Colloids
Chapter: [11] Adsorption and Colloids
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Define the term Electrophoresis.

[11] Adsorption and Colloids
Chapter: [11] Adsorption and Colloids
Concept: undefined >> undefined

Distinguish between lyophobic and lyophilic sols.

[11] Adsorption and Colloids
Chapter: [11] Adsorption and Colloids
Concept: undefined >> undefined

Identify the dispersed phase and dispersion medium in the following colloidal dispersions.

  1. milk
  2. blood
  3. printing ink
  4. fog
[11] Adsorption and Colloids
Chapter: [11] Adsorption and Colloids
Concept: undefined >> undefined

Write Hardy-Sulze rules.

[11] Adsorption and Colloids
Chapter: [11] Adsorption and Colloids
Concept: undefined >> undefined

Write a note on the Tyndall effect.

[11] Adsorption and Colloids
Chapter: [11] Adsorption and Colloids
Concept: undefined >> undefined

Write a note on Brownian motion.

[11] Adsorption and Colloids
Chapter: [11] Adsorption and Colloids
Concept: undefined >> undefined

Write a note on Types of emulsion.

[11] Adsorption and Colloids
Chapter: [11] Adsorption and Colloids
Concept: undefined >> undefined

Explain Electrophoresis diagramatically.

[11] Adsorption and Colloids
Chapter: [11] Adsorption and Colloids
Concept: undefined >> undefined
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