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Which of the statements is not true?...

Which of the statements is not true?

A

On passing `H_S` through acidified `K_2Cr_2O_7` solution, a milky colour is observed

B

`Na_2Cr_2O_7` is preferred over `K_2Cr_2O_7` is a volumetric analysis

C

`K_2Cr_2O_7` solution in acidic medium is orange

D

`K_2Cr_2O_7` solution becomes yellow on increasing the pH beyond 7

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-D-BLOCK ELEMENTS-OBJECTIVE EXERCISE-3 (PREVIOUS NEET/AIPMT QUESTIONS)
  1. Compare the stability of + 2 oxidation state of the elements of the fi...

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  2. Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. Thi...

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  3. Which of the statements is not true?

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

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  5. Four successive members of the first series of the transition metals a...

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  6. Catalytic activity of transition elements and their compounds is due t...

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  7. Which of the following exhibits only +3 oxidation state ?

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  8. Which of the following does not give oxygen on heating?

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  9. Which of the following lanthanoid ions is diamagnetic ?

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  10. Identify the correct order of solubility of Na(2)S, CuS and ZnS in aqu...

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  11. The reaction of aqueous KMnO(4) with H(2)O(2) in acidic conditions giv...

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  12. Magnetic moment 2.83 BM is given by which of the following ions ?

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  13. Reason of lanthanodi contraction is

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  14. Magnetic moment 2.84B.M. is given by (Atomic number, Ni = 28, Ti = 22,...

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  15. Which of the following processes does not involve oxidation of iron ?

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  16. Because of lanthanoid contraction, which of the folliwng pairs of elem...

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  17. Assuming complete ionisation, same moles of which of the following com...

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  18. Gadolinium belongs to 4f series. Its atomic number is 64. Which of the...

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  19. The electronic configurations of Eu (Atomic No. 63), Gd (Atomic No. 64...

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  20. Which one of the following statements related to lanthanons is incorre...

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