. Which of the following mixture will be the most difficult to separate ?
(a) Iron filings (powder) + sand (b) sand + water
(c) Sawdust + stones (d) Nitrogen + hydrogen
Answers
Answered by
2
Answer:
D
Explanation:
Because nitrogen + hydrogen is a chemical process.
Answered by
0
Answer:
Option D
Explanation:
Because Nitrogen + hydrogen are chemical change
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