Correct Answer - Option 1 : 140 gm
The weight of the two metals is in the ratio 7 : 8.
Weight of compound = 2100gm
Let the weight of two metals be 7x and 8x
Then 7x + 8x = 2100 gm
⇒ 15x = 2100 gm
⇒ x = 140 gm
∴Difference between weight of these two metals is 8x – 7x = x = 140 gm