Physics-
General
Easy
Question
Figure shows three resistor configurations R1,R2 and R3 connected to 3 V battery. If the power dissipated by the configuration R1 R2 and R3 is P1,P2 and P3, respectively, then (figure) :
- P1 > P2 > P3
- P1 > P3 > P2
- P2 > P1 > P3
- P3 > P2 > P1
The correct answer is: P2 > P1 > P3
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I) 
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A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0:9:
Given: Freezing point depression constant of' water ( 
for water) 
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for ethanol) 
Boiling point elevation constant of ethanol ( 
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Standard freezing point of water = 273 K
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Standard boiling point of water = 373 K
Standard boiling point of ethanol 351.5 K
Vapour pressure of pure water 32.8- mm Hg
Vapour pressure of pure ethanol = 40 mm Hg
Molecular weight of water = 18 g 
Molecular weight of ethanol = 46 g
In answering the following questions, consider the solutions to be ideal dilute solutions and solutes, to be non-volatile and non-dissociative.
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Boiling point elevation constant of ethanol ( for ethanol)
Standard freezing point of water = 273 K
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Molecular weight of water = 18 g
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Chemistry-General
