11. When water freeze in the polar seas the salts

1. 1. from a layer on top

   
   
   

   2. remain in the substance water that does not freeze

   
   
   

   3. sink to the bottom

   
   
   

   4. partly freeze and partly sink to the bottom

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---

12. What is the average salt content in a liter of sea water ?

1. 1. 39 gm

   
   
   

   2. 37 gm

   
   
   

   3. 35 gm

   
   
   

   4. 32 gm

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

---

---

13. The highest salinity is found in

1. 1. Lake Van

   
   
   

   2. Lake Chad

   
   
   

   3. Dead Sea

   
   
   

   4. Red Sea

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

---

14. The relief of the ocean floor is generally

1. 1. more uniform than that of the continents

   
   
   

   2. not of much significance

   
   
   

   3. more diverse than that of the continents

   
   
   

   4. show minor variation only

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

---

---

15. Major source of oceanic salinity is

1. 1. Rivers

   
   
   

   2. Land

   
   
   

   3. Wind

   
   
   

   4. Ash from volcanoes

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

---