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When K2 Cr2 O7 crystals are heated with ...

When `K_2 Cr_2 O_7` crystals are heated with conc. HCl, the gas evolved is

A

`O_(2)`

B

`Cl_(2)`

C

`CrO_(2)Cl_(2)`

D

`HCl`

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The correct Answer is:
B
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AAKASH INSTITUTE-PRINCIPLES OF QUALITATIVE ANALYSIS-Assignment (SECTION A)
  1. Which of the following is not a prelminary test used to detect ions?

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  2. Which compound does not dissolve in hot dilute HNO(3) ?

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  3. When K2 Cr2 O7 crystals are heated with conc. HCl, the gas evolved is

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  4. The only cations present in a slightly acidic solution are Fe^(3+),Zn^...

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  5. The brown ring test for NO(3)^(-) is due to the formation of the compl...

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  6. A salt which gives CO2 with hot H2 SO4 and also decolourizes acidified...

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  7. An aqueous solution FeSO(4).Al(2)(SO(4))(3) and chrome alum is heated ...

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  8. When conc. H2 SO4 is added to dry KNO3 brown fumes evolve. These fumes...

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  9. In the fifth group, (NH4)2 CO3 is added to precipitate out the carbona...

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  10. White substance dissolves in hot water. A black precipitate appears on...

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  11. A salt on treatment with dil. HCl gives a pungent smelling gas and a y...

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  12. A violet colour is obtained on adding Cl(2) water in solution of potas...

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  13. A substance on treatment with dilute H(2)SO(4) liberates a colourless ...

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  14. Which of the following statement is correct?

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  15. When H(2)S gas a passed through an ammonical salt solution X, a slight...

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  16. A mixture is known to contain NO(3)^(-) and NO(2)^(-) before performin...

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  17. The ion most difficult to removes as precipitate is

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  18. Which of the following white ppts are insoluble in NH(3)?

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  19. The brown ring complex compound is formulated as [Fe(H(2)O)(5)NO]SO(4)...

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  20. Choose the correct pair regarding solubility

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