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A certain metal will liberate hydrogen f...

A certain metal will liberate hydrogen from dilute acids. It will react with to from hydrogen only when the metal is heated and water is in the from of steam . The metal is probably

A

iron

B

Potassium manganate

C

copper

D

mercury

Text Solution

Verified by Experts

The correct Answer is:
A
`Fe+underset(dil)(H_(2)SO_(4))rarrFeSO_(4)+H_(2)uarr`
`underset("hot")(3Fe)+underset ("steam")(4H_(2)O)rarr4H_(2)uarr+Fe_(3)O_(4)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-D - AND F-BLOCK ELEMENTS-Exercise 2 (Miscellaneous Problems)
  1. Which do not decolourise KMnO(4) in aqueous solution?

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  2. Potassium permaganate acts as oxidant in alkaline and acidic media. Th...

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  3. A certain metal will liberate hydrogen from dilute acids. It will reac...

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  4. Cu^(2+) has a stronger polarising power than that of Ca^(2+) because

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  5. On addition of AgNO(3) to four different test tubes containing differe...

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  6. Which of the following compounds will show magnetic moment of 1.72 BM...

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  7. Which of the following statement (s) is /are correct? (I) In acidic ...

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  8. Which of the following paires have same radii?

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  9. Zn gives H(2) gas with H(2)SO(4) and HCl but not with HNO(3) because

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  10. Which of the statements (s) is/are not true?

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  11. When H(2)O(2) is shaken with an acidified solution of K(2)Cr(2)O(7) in...

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  12. Which of the following lanthanoid ions is diamagnetic? (Atomic number ...

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  13. The trivalent ion having size in lanthanide series is

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  14. The correct statement is

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  15. A metal gets coated with a green basic carbonate when exposed to atmos...

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  16. The colour of light absorbed by an aqueous solution of CuSO(4) is

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  17. Which one of the following does not correctly represent the correct or...

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  18. Which one of the following has a magnetic moment of 1.75 BM?

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  19. The oxidation state of chromium in the final product formed by the rea...

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  20. Which of the following compound is used in gas lighter?

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