Arrange the following in the increasing order of their viscocities- Water- hexane CH 3 CH 2 CH 2 CH 2 CH 2 CH 3- glycerine CH 2 OHCH OH CH 2 OH A- Hexane - Water - GlycerineB- Glycerine - Water - HexaneC- Glycerine - Hexane - WaterD- Water - Hexane - Glycerine

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Question

Arrange the following in the increasing order of their viscocities: Water, hexane $(C H_{3} C H_{2} C H_{2} C H_{2} C H_{2} C H_{3})$ , glycerine $(C H_{2} O H C H (O H) C H_{2} O H)$

Water < Hexane < Glycerine

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Hexane < Water < Glycerine

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Glycerine < Water < Hexane

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Glycerine < Hexane<Water

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Solution

The correct option is B Hexane < Water < Glycerine
Hexane has weakest intermolecular forces and glycerine the strongest. (Three OH groups). Therefore, hexane has minimum viscosity and glycerine has maximum viscosity.

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Viscosity of a liquid arises due to strong intermolecular forces existing between the molecules. Stronger the intermolecular forces, greater is the viscosity. Name the intermolecular forces existing in the following liquids and arrange them in the increasing order of their viscosities. Also give reason for the assigned order in one line.

Water, hexane $(C H_{3} C H_{2} C H_{2} C H_{2} C H_{2} C H_{3})$ glycerine $(C H_{2} O H C H (O H) C H_{2} O H)$

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Arrange the following in the increasing order of their viscocities: Water, hexane (CH3CH2CH2CH2CH2CH3), glycerine (CH2OHCH(OH)CH2OH)

The correct option is B Hexane < Water < GlycerineHexane has weakest intermolecular forces and glycerine the strongest. (Three OH groups). Therefore, hexane has minimum viscosity and glycerine has maximum viscosity.

Arrange the following in the increasing order of their viscocities: Water, hexane $(C H_{3} C H_{2} C H_{2} C H_{2} C H_{2} C H_{3})$ , glycerine $(C H_{2} O H C H (O H) C H_{2} O H)$

The correct option is B Hexane < Water < Glycerine
Hexane has weakest intermolecular forces and glycerine the strongest. (Three OH groups). Therefore, hexane has minimum viscosity and glycerine has maximum viscosity.