हवा में nitrogen और oxygen का होना किस बात को दिखाता है?
Presence of nitrogen and oxygen in air shows what?
Explanation opens after your attempt
A. हवा एक mixture हैAir is a mixture
Concept
Air has several gases physically mixed. Therefore air is a mixture.
Why this answer is correct
The correct answer is A. हवा एक mixture है / Air is a mixture. Air has several gases physically mixed. Therefore air is a mixture.
Exam Tip
Air में several gases physically mixed हैं। इसलिए air mixture है।
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