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CSIR-NET 2016 DEC (30)

9 comments
CSIR-NET

30. The relative abundance of elements, in decreasing order, in the Earth is

A) iron, oxygen, silicon, magnesium
B) oxygen, silicon, aluminium, iron
C) iron, magnesium, silicon, oxygen
D) oxygen, silicon, aluminium, magnesium

Answer: A 

 Explanation: 

 1. This is little bit confusing question. 

 2. There are two type of questions 

a) abundance of elements in the Earth's crust? 

b) abundance of  elements in the Earth? 

 please study clearly  the question.
a) abundance of elements in the Earth crust is-

 Answer: 

 1. Oxygen (46.6%) 
2. Silicon (27.7%) 
3. Aluminum (8.1%) 
4. Iron (5.0%) 
5. Calcium (3.6%) 
6. Sodium (2.8%)
7. Potassium (2.6%)
8. magnesium (2.1%) 


b) abundance of elements in the Earth?

Answer: 

1. Iron   
2. Oxygen  
3. Silicon   
4. Magnesium 



Reference : https://www.sandatlas.org/composition-of-the-earths-crust/
csir net 2016 question no 30 answer csir-net 2016 in decreasing order in the Earth is The relative abundance of elements

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9 comments

  1. Unknown21 December 2016 at 00:40

    right answer

    ReplyDelete
  2. Unknown21 December 2016 at 01:28

    A

    ReplyDelete
  3. GPSURYA27 July 2017 at 04:16

    Correct Answer...

    ReplyDelete
  4. Unknown27 May 2018 at 21:39

    Earths major elements:
    1 Iron 32%
    2 Oxygen 30%
    3 Silicon 15%
    4 Magnesium 13.9%
    5 Sulfur 2.9%
    6 Nickel 1.8%
    7 Calcium 1.5%
    8 Aluminium 1.4%, etc

    ReplyDelete
  5. Unknown27 May 2018 at 21:43

    Earths crust major elements:
    1 Oxygen 46%
    2 Silicon 28%
    3 Aluminum 8.2%
    4 Iron 5.6%
    5 Calcium 4.2%
    6 Sodium 2.5%
    7 Magnesium 2.5%
    8 Potassium 2%
    9 Titanium 0.6%, etc

    ReplyDelete
  6. Unknown27 May 2018 at 21:45

    Earths Mantle major elements:
    1 Oxygen 45%
    2 Magnesium 23%
    3 Silicon 22%
    4 Iron 5.8%
    5 Calcium 2.3%
    6 Aluminium 2.2%
    7 Sodium 0.3%
    8 Potassium 0.3%, etc

    ReplyDelete
  7. GPSURYA27 May 2018 at 21:45

    Nice explanation nanajee..

    ReplyDelete
  8. Unknown27 May 2018 at 21:47

    Earths Core major elements:
    1 Iron 88.8%
    2 Nickel 5.8%
    3 Sulfur 4.5%

    ReplyDelete
  9. Ferrosiliconmagnesium2 February 2026 at 04:58

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    ReplyDelete

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