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Q.

(A) Cassiterite mineral is concentrated by electromagnetic method
(R) Tinstone is non-magnetic and impurity wolframite is magnetic

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a

Both (A) and (R) are true and (R) is the correct explanation of (A)

b

Both (A) and (R) are true but (R) is not the correct explanation of (A)

c

(A) is true but (R) is false

d

Both (A) and (R) are false

answer is A.

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Detailed Solution

  • Electromagnetic separation is used to separate magnetic ore particles from non-magnetic impurities (or vice versa), wherein electromagnets present in the rotor attracts magnetic ores and forms a separate heap than the impurities. 
  • Tin stone (also known as Cassiterite) contains SnO2 (non-magnetic) and Wolframite, FeWO4 (magnetic) and is concentrated by this method.
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(A) Cassiterite mineral is concentrated by electromagnetic method(R) Tinstone is non-magnetic and impurity wolframite is magnetic