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Preparation of Hydrogen

Which of the ...

Question

Which of the following will be decomposed into hydrogen by metals like $F e, S n, N i$ ?

A

Cold water

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B

Boiling water

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C

Steam

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D

All of these

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Solution

The correct option is C Steam
$F e, S n, N i$ are not easily oxidised so,it is a poor reducing agent and can not reduce cold and boiling water.It can just reduce steam.Steam is the easiest to reduce.

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Similar questions

Q. Which one among the following is the strongest reducing agent?

F e^{2 +} + 2 e^{-} \to F e (- 0.44 V)

N i^{2 +} + 2 e^{-} \to N i (- 0.25 V)

S n^{2 +} + 2 e^{-} \to S n (- 0.14 V)

F e^{3 +} + e^{-} \to F e^{2 +} (+ 0.77 V)

Q. Which of the following will produce hydrogen on decomposition by metals like

N a, K, C a

?

Q. Which one among the following is the strongest reducing agent?

F e^{2 +} + 2 e^{-} \to F e (- 0.44 V)

N i^{2 +} + 2 e^{-} \to N i (- 0.25 V)

S n^{2 +} + 2 e^{-} \to S n (- 0.14 V)

F e^{3 +} + e^{-} \to F e^{2 +} (+ 0.77 V)

Q. Metallic radii of some transition elements are given below. Which of these elements will have the highest density?

Element	$F e$	$C o$	$N i$	$C u$
Metallic radii/pm	126	125	125	128

Q. Nitro compounds can be reduced with active metals such as Fe, Sn, Zn etc. Which of the following is true statement?

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