Civil Engineering - Building Materials - Discussion
Discussion Forum : Building Materials - Section 2 (Q.No. 42)
42.
Minimum of 40% of iron, is available in
Discussion:
11 comments Page 1 of 2.
Amit ami sharma said:
9 years ago
It's;
Pure magnetite 72.4%.
Hamatile 69.9%.
Limonite 59.8%.
Siderite 48.2%.
Pyrite 46.6%.
And minimum 40% black band is the correct answer.
Pure magnetite 72.4%.
Hamatile 69.9%.
Limonite 59.8%.
Siderite 48.2%.
Pyrite 46.6%.
And minimum 40% black band is the correct answer.
(9)
Kavirvasava said:
3 years ago
Siderite contains 40% of iron. Black band iron percentage is up to 40% not a minimum 40%.
(1)
Nitin said:
10 years ago
Black band means?
GOWDA said:
10 years ago
Black band means Chromite.
Jayesh said:
10 years ago
Answer is siderite.
(1) Haematite Red oxide of iron (Fe2O3) 65 to 70% of iron.
(2) Limonite 2Fe2O3, 3H2O (60% of iron).
(3) Magnetite Fe3O4 (70 to 73% of iron).
(4) Pyrite FeS2 (45 to 47% of iron).
(5) Siderite FeCO3 (40% of iron).
(1) Haematite Red oxide of iron (Fe2O3) 65 to 70% of iron.
(2) Limonite 2Fe2O3, 3H2O (60% of iron).
(3) Magnetite Fe3O4 (70 to 73% of iron).
(4) Pyrite FeS2 (45 to 47% of iron).
(5) Siderite FeCO3 (40% of iron).
Baloch said:
9 years ago
Yes, agree @Amit.
Sundar said:
9 years ago
Why black band? Please explain clearly.
Chandru said:
8 years ago
Black band is thin siderite which contains 40% of iron.
Ujjwal Mondal said:
6 years ago
It's a siderite. Black band iron percentage is up to 40% not minimum 40%.
Ruchitha said:
5 years ago
Which is the correct answer siderite or black band? Please explain.
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