Practice Questions CBSE - Science Class 10 (2023 Boards)

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Question 17 [Assertion Reasoning] Important

Question 18 [Assertion Reasoning] Important

Question 19 [Assertion Reasoning] Important

Question 20 [Assertion Reasoning]

Question 21 (Choice 1) Important

Question 21 (Choice 2)

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Question 24 Important You are here

Question 25 (Choice 1)

Question 25 (Choice 2)

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Question 29 (Choice 1)

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Question 30 Important

Question 31 (a)

Question 31 (b) Important

Question 32 (Choice 1)

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Question 33 (a)

Question 33 (b)

Question 33 (c) Important

Question 34 (a) - Choice 1

Question 34 (b) - Choice 1 Important

Question 34 (c) - Choice 1

Question 34 (a) - Choice 2 Important

Question 34 (b) - Choice 2]

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Question 35 (a) - Choice 1 Important

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Question 36 Important

Question 37 (a) - Choice 1 [Case Based]

Question 37 (b) i - Choice 2 [Case Based] Important

Question 37 (b) ii - Choice 2 [Case Based] Important

Question 38 (a) - Choice 1 [Case Based]

Question 38 (b) - Choice 1 [Case Based] Important

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Question 39 (a) - Choice 1 [Case Based] Important

Question 39 (b) - Choice 1 [Case Based]

Question 39 (c) - Choice 1 [Case Based]

Question 39 (d) - Choice 1 [Case Based] Important

Question 39 (d) - Choice 2 [Case Based] Important

Oxygen, mostly, is carried by a pigment in our blood whereas carbon dioxide is transported in dissolved form in our blood. 

Give TWO reasons that make the above statement correct.

 

Answer:

  • Oxygen in our blood is carried by Haemoglobin , the red pigment present in RBCs. 
  • This is because Haemoglobin has a very high affinity for Oxygen as compared to water. 
  • Similarly, carbon dioxide , due to its high affinity for water , can readily dissolve in the water present in blood to be easily transported.

Hemoglobin carrying Oxygen in Blood - teachoo.jpg

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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo