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Reaction of Acids and Bases with Metals

State which o...

Question

State which of the following methods is generally used for preparing the $F e S$ salts
1: Neutralisation-insoluble base & dilute acid.
2: Neutralisation-alkali & dilute acid.
3: Simple displacement-active metal & dilute acid.
4: Direct combination.
5: Precipitation [double decomposition].

A

1

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B

2

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C

3

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D

4

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Solution

The correct option is D 4
Iron(II) sulfide is obtained by heating of iron and sulfur which is a direct combination.
$F e + S ⟶ F e S$

Hence, the correct option is $(D)$

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Q. STATE WHICH OF THE FOLLOWING METHODS IS GENERALLY USED FOR PREPARATION OF THE SALTS 1-5 GIVEN BELOW:
A. Neutralisation (insoluble base and dilute acid)
B. Neutralisation (Alkali and dilute acid)
C. Simple displacement (active metal and dilute acid)
D. Direct combination
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