The yield of HNO3 collected in the tube can be maximized by maintaining the temperatures

Question

The apparatus shown below can be used to prepare HNO₃ (boiling point = 86°C).

The yield of HNO₃ collected in the tube can be maximized by maintaining the temperatures of the flask and tube, respectively, at 

(a) 0°C and 100°C 

(b) 100°C and 0°C 

(c) 350°C and 150°C 

(d) 350°C and 100°C

Answer 1

(b) 100°C and 0°C