The amount of nitrogen in the atmosphere is: (a) 21 per cent (b) 78 per cent (c) 9 per cent (d) 0.03 per cent

The amount of nitrogen in the atmosphere is: (a) 21 per cent (b) 78

1.	The amount of nitrogen in the atmosphere is: (a) 21 per cent (b) 78 per cent (c) 9 per cent (d) 0.03 per cent
Answer» Correct Answer is: (b) 78 per cent