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Which of the following on addition will ...

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)

A

I,II

B

II,III

C

I,III

D

I,II,III

Text Solution

Verified by Experts

The correct Answer is:
D
`Ag^(+)+SCN^(-)rarr AgSCNdarr`
`Hg^(2+)+SCN^(-) rarr Hg(SCN)_(2)darr`
`4Fe^(3+)+3(COO)_(2)^(2-)rarr2Fe_(2)(COO)_(3)darr`
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DINESH PUBLICATION-IONIC EQUILIBRIUM -UNIT TEST -2
  1. For any weak acid indicator (Hln) colour change is observed when

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  2. For the following equilibrium N(2)O(4)(g)hArr 2NO(2)(g) K(p) is f...

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  3. For the following equilibrium PCl(5)(g) hArr PCl(3)(g)+Cl(2)(g) K...

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  4. The pH of a 0.1 M aqueous solution of a weak acid (HA) is 3. What is ...

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  5. For the reversible reaction, net rate is 2NO(g)+O(2)(g) hArr 2NO(2)(...

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  6. Without knowing the value of reaction quotient which of the following ...

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  7. For the following equilibrium reaction N(2)O(4)(g)hArr 2NO(2)(g), NO(...

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  8. In the equilibrium , PCl(5)hArr PCl(3)+Cl(2) starting with 2 mol of PC...

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  9. Which of the following on addition will cause deep red colour to disap...

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  10. In the followin equilibrium amount of CO(g) can be decreased by CO(g...

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  11. Pressure is doubled in each of the following equilibrium . In which ca...

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  12. Which of the following is a state function ?

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  13. 1 gH(2) gas STP is expanded so that the volume is doubled. Hence, work...

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  14. A mol of Al(3)C(4)(s) reacts with water in a closed vessel at 27^(@)C ...

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  15. If the above system is an open vessel the work done is

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  16. The temperature of 1 mole helium gas is increased by 1^@C. Find the in...

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  17. When 1 mol of CO(2)(g) occupying volume 1^(@)C AT 27^(@)C is expande...

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  18. Select the correct alternative for the endothermic change.

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  19. A process which is unfavourable with respect to entropy

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  20. All the statements regarding the symbol Delta G are true except

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