Following figure shows two processes A and B for a gas. If DQA and DQB are the amount of heat absorbed by the system in two cases, and DUA and DUB are changes in internal energies, respectively, then:

The amount of heat produced in an electric circuit depends upon the current (I), resistance (R) and time (t). If the error made in the measurements of the above quantities are 2%, 1% and 1% respectively then the maximum possible error (in %) in the total heat produced will be

When heat is given to a gas in an isobaric process

The work of 146 KJ is performed on order to compress one kilo mole of a gas adiabatically and in this process the temperature of the gas is increases by  C.

Three objects coloured black, gray and white can withstand hostile conditions up to 2800∘C. These objects are thrown into a furnace where each of them attains a temperature of 2000∘C. Which object will glow brightest?