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#1 2017-10-18 04:26:19

shakeel123
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This Gas is used for respiration?

9th Class Karachi Board Exams Quizzes MCQs Quizzes Karachi Board 9th Class Chemistry Online Test 1

Question:
This Gas is used for respiration?

Option A):
Nitrogen
Option B):
Hydrogen
Option C):
Chlorine
Option D):
Oxygen

Correct Answer is Option D):
Oxygen


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2017-10-18 04:26:19

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