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Zn gives H2 gas with H2SO4 and HCl but n...

Zn gives `H_2` gas with `H_2SO_4` and HCl but not with `HNO_3` because

A

Zn acts as oxidizing agent when reacts with `HNO_(3)`

B

`HNO_(3)` is weaker acid than `H_(2)SO_(4)` and HCl

C

In electrochemical series Zn is above hydrogen

D

`NO_(3)^(-)` is reduced in preference to hydronium ion

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AAKASH SERIES-ELECTROCHEMISTRY -OBJECTIVE EXERCISE - 1 ( Electrode potentials and EMF)
  1. {:(" LIST - 1 ", " LIST - 2 "),( "A) Very dilute " H(2)...

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  2. Standard reduction electrode potential of three metals A, B and C are ...

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  3. The difference of potential of two electrodes in a galvanic cell is kn...

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  4. Standard reduction electrode potential of three metals A, B and C are ...

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  5. Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because

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  6. The standard reduction potentials at 298 K for the following half cell...

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  7. When Zn piece is kept in CuSO4 solution, copper gets precipitated beca...

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  8. Beryllium is placed above magnesium in the Il group. When beryllium du...

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  9. For I2 + 2e to 2I^(-) , standard reduction potential = + 0.54 volt. Fo...

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  10. Which of the following reactions are not feasible?

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  11. E^(@) for Fe^(2+) + 2e to Fe is -0.44 V , E^(@) for Zn^(2+) + 2e to ...

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  12. Based on the data given below , the correct order of reducing power i...

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  13. The S.R.Ps of Cu^(2+) // Cu , Hg^(2+)//Hg and Zn^(2+)//Zn are respecti...

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  14. For the cell prepared from electrod A , Cr2O7^(2-) |Cr^(3+) , E("red"...

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  15. Standared electrode potential of two half-reactions are given below : ...

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  16. The E(M^(3+)|M^(2+))^(0) values for Cr, Mn, Fe and Co are -0.41, +1.57...

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  17. The standard reduction potentials of Zn and Ag in water at 298 K are,...

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  18. A student made the following observations in the laboratory, A) Cl...

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  19. For the electrochemical cell M// M^(+) // // X^(-) // X , E^(0) M^(+)...

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  20. Four colourless salt solutions are placed in separate test tubes and a...

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