What are the requirements of a surface to be highly efficient for gaseous exchange? How has this efficiency increased from fish to mammals?

Read the statements below and identify the one that will not help in increasing the efficiency of gaseous exchange in the alveoli .

The efficiency of a cell when connected to a resistance R is 60 % . What will be its efficiency if the external resistance is increased by six times?

Temperature of source is 327^(@)C . Temperature of sink is changed in order to increase the efficiency of engine from (1)/(5) to (1)/(4) , by

Temperature of source is 327^(@)C . Temperature of sink is changed in order to increase the efficiency of engine from (1)/(5) to (1)/(4) , by

Assertion : An electrostatic precipitator (ESP) is a particulate collection device that removes dust and smoke particles from flowing air using the force of an induced electrostatic charge. Reason : An ESP is a highly efficient device as it removes 99 percent of particulate matter present in the exhaust from a thermal power plant.

A carnot engine has an efficiency 0.4. When the temperature of the source is increased by 20^(@)C and the sink is reduced by 20^(@)C, its efficiency is found to increase to 0.5. Calculate the temperature of source and sink.

A Carnot engine operating between temperature T_1 and T_2 has efficiency 1/6. When T_2 is lowered by 62K its efficiency increase to 1/3. Then T_1 and T_2 are, respectively:

A Carnot engine operating between temperature T_1 and T_2 has efficiency 1/6. When T_2 is lowered by 62K its efficiency increase to 1/3. Then T_1 and T_2 are, respectively:

Assertion : Efficiency of a Carnot engine increase on reducing the temperature of sink. Reason : The efficiency of a Carnot engine is defined as ratio of net mechanical work done per cycle by the gas to the amount of heat energy absorbed per cycle from the source.