21. Which enterior part of the earth nearly half of the radius of the earth

1. 1. Core

   
   
   

   2. Crust

   
   
   

   3. Mantle

   
   
   

   4. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

---

22. In the structure of planet Earth, below the mantle, the core mainly made up of which one of the following ?

1. 1. Aluminium

   
   
   

   2. Chromium

   
   
   

   3. Iron

   
   
   

   4. Silicon

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

---

---

23. Mohorovic discontinuity separates

1. 1. Core and mantle

   
   
   

   2. Crust and mantle

   
   
   

   3. Inner core and outer core

   
   
   

   4. Sima and nife

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---

24. Which is the second most abundant metal in the earth's crust

1. 1. Iron

   
   
   

   2. Aluminium

   
   
   

   3. Copper

   
   
   

   4. Zinc

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---

---

25. Which one of the following is the correct statement ? The boundry zone between the North America plate and the Eurasian plate exhibits conditions of

1. 1. convergence

   
   
   

   2. divergence

   
   
   

   3. sinking

   
   
   

   4. sliding

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---