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Q.

Match the following
Column I Column II
A Calcination a $2 C u_{2} S + 3 O_{2} \to 2 C u_{2} O + 2 S O_{2}$
B Roasting b $F e_{2} O_{3} . n H_{2} O \to F e_{2} O_{3} + n H_{2} O$
C Flux c $C r_{2} O_{3} + 2 A l \to A l_{2} O_{3} + 2 C r$
D Thermite d $S i O_{2} + F e O \to F e S i O_{3}$

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a

A - a, B - b, C - c, D - d

b

A - c, B - a, C - b, D - d

c

A - b, B - a, C - d, D - c

d

A - d, B - a, C - b, D - c

answer is B.

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Detailed Solution

detailed_solution_thumbnail

	Column I		Column II
A	Calcination	b	$F e_{2} O_{3} . n H_{2} O \to F e_{2} O_{3} + n H_{2} O$
B	Roasting	a	$2 C u_{2} S + 3 O_{2} \to 2 C u_{2} O + 2 S O_{2}$
C	Flux	d	$S i O_{2} + F e O \to F e S i O_{3}$
D	Thermite	c	$C r_{2} O_{3} + 2 A l \to A l_{2} O_{3} + 2 C r$

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