Question

Which of the following statements are correct with respect ​

to oxygen?​

P: It is insoluble in water. ​

Q: It the second most abundant gas present in the atmosphere.​

R: Oxygen is necessary for combustion.​

S: Plants get nitrogen and oxygen from air.​

• A. P and R​
• B. P, Q and R
• C. Q, R and S​
• D. Q and R​

Answer 1

The correct option is D Q and R​

• Oxygen is soluble in water. So statement P is false.
• Oxygen is the second most abundant gas present in the atmosphere. So, Q is true.
• Oxygen helps in burning. Oxygen supports combustion and is used up in burning. When oxygen combines, chemically, with another chemical like carbon or hydrogen, energy is released
• Plants cannot get nitrogen from air directly. So, statement S is false.