Question Text
Question 4 :
Assertion: The presence of reactants in the closed vessel made of conducting material is an example of a closed system.
Reason: In a closed system, there is no exchange of matter but exchange of energy is possible between the system and the surroundings.
Question 5 :
A system where there is exchange of energy but not of mass is called _________ system.
Question 6 :
Temperatures of two hot bodies $$B_{1}$$ and $$B_{2}$$ are $$100^{\circ}C$$ and $$80^{\circ}C$$ respectively. The temperature of surrounding is $$40^{\circ}C$$. At $$t = 0$$, the ratio of rates of cooling of the two bodies (liquid) $$R_{1} : R_{2}$$ will be:
Question 8 :
If there were no atmosphere, the average temperature on earth surface would be<br>
Question 12 :
Assertion: When ideal gas expand from $$P_1,V_1,T_1$$ to $$P_2,V_2,T_2 $$in two steps, and work done is high in<br>which number of steps are high
Reason: Work is path function
Question 14 :
Assertion: The graph between $$P\ V/s \dfrac {1}{V}$$ is a straight line.
Reason: For adiabatic process $$P\propto \dfrac {1}{V}$$
