86. Which of the following is the best conductor of the heat?

1. 1. Mercury

   
   
   

   2. Silver

   
   
   

   3. Leather

   
   
   

   4. Benzene

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

---

87. In an isothermal change an ideal gas obey's

1. 1. Boyle's law

   
   
   

   2. Charle's law

   
   
   

   3. Gay-Lussac's law

   
   
   

   4. None of the above

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

---

---

88. A refrigerator, with its powers on, is kept in closed room with its door open. The temperature of the room will

1. 1. Rise

   
   
   

   2. Fall

   
   
   

   3. Remains the same

   
   
   

   4. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

---

89. The thermal conductivity of a plate depends on

1. 1. The temperature difference between the two sides

   
   
   

   2. The thickness of the plate

   
   
   

   3. The area of the plate

   
   
   

   4. None of the above

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

---

---

90. A gas has

1. 1. One specific heat

   
   
   

   2. Two specific heat

   
   
   

   3. Three specific heat

   
   
   

   4. linfinite specific heat

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

---