11th Physics Unit Wise Question Paper. We covered all the 11th Physics Unit Wise Question Paper in this post for free so that you can practice well for the exam.
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11th Physics Objective Questions for Students
70 cal of heat is required to raise the temperature of 2 moles of an ideal gas at constant pressure from 30°C to 35°C. The amount of heat required in calories to raise the temperature of the same gas through the same range (30° to 35°C) at constant volume is (R = 8.31 J/mol K) :
(A) 30
(B) 50
(C) 70
(D) 90
Option b – 50
For an ideal gas, the heat capacity at constant pressure is larger than that at constant volume because work is done during an expansion
(A) Of the gas by the external pressure
(B) By the gas against intermolecular forces of attraction
(C) By the gas against external pressure
(D) More collisions occur per unit of time when the volume is kept constant
Option c – By the gas against external pressure
The specific heat of some substance is expressed in the units i.e. C₁ cal/g °C and C₂ cal/g °F which of the following relation is true? :
(A) C₁ = C₂
(B) C₁ > C₂
(C) C₁ < C₂
(D) C₁ and C₂ cannot be compared
Option b – C₁ > C₂
The molar specific heat of oxygen at constant pressure is 7.03 cal/mol °C and R = 8.31 J/mol°C. – The amount of heat taken by 5 moles of oxygen when heated at constant volume from 10°C to 20°C will be approximate:
(A) 25 cal
(B) 50 cal
(C) 250 cal
(D) 500 cal
Option c – 250 cal
For a gas, the difference between two specific heats is 4150 J/kg K. What is the specific heat at a constant volume of a gas if the ratio of specific heats is 1.4?:
(A) 8475 J/kg K
(B) 5186 J/kg K
(C) 1660 J/kg K
(D) 10375 J/kg K
Option d – 10375 J/kg K
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