Home
Class 12
CHEMISTRY
The following reaction is at equilibrium...

The following reaction is at equilibrium ,
`underset("Yellow")(Fe_((aq))^(3+))+ underset("Colourless")(SCN_((aq)))rArrunderset("Deep red")([Fe(SNC)]_((aq))^(2+))`
`K_(c)=([Fe(SCN)])/([Fe^(3+)][SCN])`
In the above reaction , colour intensity of red colour can be increased by :-

A

addition of KSCN

B

addition of oxalic acid which reacts with `Fe^(3+)` ions

C

addition of `Hg^(2+)` ions which react with `SCN^(-)` ions

D

red colour intensity cannot be changed

Text Solution

Verified by Experts

The correct Answer is:
1
Promotional Banner

Topper's Solved these Questions

  • Chemical bonding

    ALLEN|Exercise All Questions|39 Videos

  • CHEMISTRY AT A GLANCE

    ALLEN|Exercise ORGANIC CHEMISTRY|483 Videos

Similar Questions

Explore conceptually related problems

Which of the following on addition will cause deep red colour to disappear ? (A) underset("Pale yellow")(Fe^(3+)(aq)) + underset("Colourless")(SCN^(-)(aq))hArr underset("Deep red")([Fe(CNS)^(2)](aq)) I. AgNO_(3)" "II.HgCl_(2)" "III.H_(2)C_(2)O_(4)" " (oxalic acid)

underset("Sulphate")underset("Copper")(CuSO_(4_((aq))))+Fe_((s))rarrunderset("Sulphate")underset("Ferrous")(FeSO_(4_((aq))))+Cu_((S))

Following equilibrium is set up when SCN^(-) ion is added to Fe^(3+) in aqueous solution : underset("Pale yellow")(Fe^(3+))" "+" "underset("Colour less")(SCN^(-))" "hArr" "underset("Deep red")([Fe(SCN)]^(2+)) When silver nitrate is added to the solution, AgSCN gets precipitate. What will happen to the equilibrium?

Influence of pressure, temperature, concentration and addition of inert gas on a reversible chemical reaction in equilibrium can be explained by formulating the expression for equilibrium constant K_(c) or K_(p) for the equilibrium. On the other hand Le Chatelier principle can be theoretically used to explain the effect of P , T or concentration on the physical or chemical equilibrium both. For the reaction: underset(Yellow)(Fe_((aq.))^(3+))+SCN_((aq.))^(-)hArrunderset(Red)([Fe(NCS)]_((aq.))^(2+)) in equilibrium if little more aqueous solution in FeCl_(3) is added, then:

In the following reaction, which is the species being oxidised ? 2Fe_((aq))^(3+)+2I_((aq))^(-) to I_(2(aq))+2Fe_((aq))^(2+)

Complete the following : underset("Blood red colouration")(Fe^(3+) underset("Excess")overset(SCN^(-))to (A) underset("Excess")overset(F^(-)) to (B)) Find the spin magnetic moment of B.

The expression for equilibrium constant, K_(c) for the following reaction is Fe_((aq))^(3+)+3OH_((aq))^(-)hArrFe(OH)_(3(s))

ALLEN-Chemical Equilibrium-All Questions
  1. In the reaction N(2(g))+O(2(g))rArr2NO((g))at equilibrium the concent...

    Text Solution

    |

  2. At the equilibrium of the reaction , N(2)O(4)(g)rArr2NO(2)(g), th...

    Text Solution

    |

  3. When sulphur is heated at 800 K, the initial pressure of 1 atm decreas...

    Text Solution

    |

  4. K(p) value for C(2)H(4(g))+H(2(g))rArrC(2)H(6(g))is 5xx10^(18)" a...

    Text Solution

    |

  5. For the reaction NH(4)HS(s)rArrNH(3)(g)+H(2)S(g) ,K(p)=0.09. The ...

    Text Solution

    |

  6. The conversion of ozone into oxygen is exothermic . Under what conditi...

    Text Solution

    |

  7. In the dissociation of I(2)(g) at 1000 K in a container of 1 litre :-...

    Text Solution

    |

  8. What is the effect of temperature and pressure on the yields of produc...

    Text Solution

    |

  9. In a reversible reaction K(c)gtK(p)andDeltaH=+40kCal. The product w...

    Text Solution

    |

  10. For the dissociation reaction N(2)O($) (g)hArr 2NO(2)(g), the degree o...

    Text Solution

    |

  11. The prepation of SO(3)(g) by reaction SO(2)(g)+(1)/(2)O(2)(g)hArrSO(3)...

    Text Solution

    |

  12. At 473 K,K(c) for the reaction OCl(5(g))rArrPCl(3(g))Cl(2(g)) ...

    Text Solution

    |

  13. 18.4 g of N(2)O(4) is taken in a 1 L closed vessel and heated till the...

    Text Solution

    |

  14. 5 moles of SO(2) and 5 moles of O(2) react in a closed vessel. At equi...

    Text Solution

    |

  15. For the reaction N(2(g))+O(2(g))rArrNO((g)), the value of K(c) at ...

    Text Solution

    |

  16. NH(4)COONH(2)(s)hArr2NH(3)(g)+CO(2)(g) If equilibrium pressure is 3 at...

    Text Solution

    |

  17. 0.6 moles of PCl(5), 0.3 mole of PCl(3) and 0.5 mole of Cl(2) are ...

    Text Solution

    |

  18. N(2)O(4(g))rArr2NO(2),K(c)5.7xx10^(-9) at 298 K At equilibrium :-

    Text Solution

    |

  19. The following reaction is at equilibrium , underset("Yellow")(Fe(...

    Text Solution

    |

  20. Formation of ClF(3) from Cl(2)and F(2) is an exothermic process . The ...

    Text Solution

    |