MCQ practice · SSC Physics Board questions · Chapter 5: State of Matter and Pressure
What is the density of iron?
Think it through first, then pick an option.
- a 7.80 gm/cc
- b 2.60 gm/cc
- c 1.00 gm/cc
- d 0.25 gm/cc
Answer and explanation
Correct answer: a 7.80 gm/cc
In Table 5.01 the density of iron is 7.80 gm/cc.
Why the other options are wrong
- b 2.60 gm/cc: The value 2.60 gm/cc is the density of glass in the table, not of iron.
- c 1.00 gm/cc: The value 1.00 gm/cc is the density of water; iron is far denser than water.
- d 0.25 gm/cc: The value 0.25 gm/cc is the density of cork, not of iron.
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