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Extraction of Iron

Calcium occur...

Question

Calcium occurs as a/an___________.
(a) oxide ore (b) halide ore (c) carbonate ore (d) sulphide ore

A

a, b

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B

b, c

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C

a, d

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D

c, d

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Solution

The correct option is B b, c
Calcium occurs as carbonate in limestone $(C a C O_{3})$ and as flouride in flourspar $(C a F_{2})$ .

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Q. Copper occurs as a/an _________.
(a) oxide ore (b) halide ore (c) carbonate ore (d) sulphide ore

Q. Name one metal each occurring as a
(a) sulphide ore
(b) halide ore
(c) carbonate ore
(d) oxide ore

Which metal occurs as:

(a) A sulphide, (b) a halide,

(c) a carbonate, (d) an oxide.

Also gives the names of their respective ores.

Q. Match column A with column B and select the correct option:

	Column A (Ore)		Column B (Nature of ore)
(a)	Copper glance	(i)	Sulphate ore
(b)	Calamine	(ii)	Halide ore
(c)	Rock salt	(iii)	Sulphide ore
(d)	Epsom salt	(iv)	Carbonate ore

Q. Match the column (I) and (II) and select the correct answer using the codes given below.

Column-I	Column-II
(a) Argentite	(1) Halide ore of magnesium
(b) Cuprite	(2) Carbonate ore of iron
(c) Siderite	(3) Oxide ore of copper
(d) Carnallite	(4) Sulphide ore of silver

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