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Q.

Match the following columns.

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a

A - r ; B - p, q ; C - r,s ; D - r,p

b

A - p,q,s ; B - p,q,s ; C - q,s ; D - r

c

A - p,q,r ; B - p,q ; C - r,s ; D - s

d

A - p,q,r ; B - q,r ; C - r,s ; D - p,q

answer is B.

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Detailed Solution

A→p,q,s,B→p,q,s,C→q,s,D→rIron pyrites or fool's gold is FeS2. Being sulphide ore it is concentrated is PbS. It is also a sulphide ore so concentrated by froth floatation forces. Haematite is Fe2O3.
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