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The chemical formula of potassium chroma...

The chemical formula of potassium chromate is `K_2Cr_2O_7`

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The chemical formula of potassium chromate is `K_2CrO_4`
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Write the formula of the compound formed by K_(2)Cr_(2)O_(7) in alkaline solution with 30% H_(2)O_(2) :

Ptassium chromate is isomorphous to potassium sulphate (K_(2)SO_(4)) and it is found to have 26.78% Cr . Calculate the at. Wt. of Cr if at. W.t of potassium is 39.10 .

Assertion (A): Potassium dichromate is preferred to Na_(2)Cr_(2)O_(7) for use in volumetric analysis (titrations) Reason (R): Na_(2)Cr_(2)O_(7) is hygroscopic whilst the K_(2)Cr_(2)O_(7) is not Which of the following is correct ?

Reaction of aniline with K_2Cr_2O_7 gives

Write balaned chemical equations for: (i) Mixture of K_(2)Cr_(2)O_(7) and NaCl is heated with concentrated H_(2)SO_(4) . (ii) Potassium permanganate is added to a hot solution of manganous sulphate. (iii). Potassium dischromate and concentrated HCl are heated together.

Balance the chemical equations: K_2Cr_2O_7 + HCl to KCl + CrCl_3 + H_2O + Cl_2

TARGET PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-True or False
  1. The ozone layer in the earth's atmosphere protects the life on earth f...

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  2. Hydrogen peroxide undergoes slow decomposition into water and oxygen.

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  3. The chemical formula of potassium chromate is K2Cr2O7

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  4. Nascent ocygen is represented [O].

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  5. When ferric ion is formed from ferrous ion, the positive charge is inc...

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  6. The chemical process in which the positive charge on an atom or an ion...

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  7. The conversion of FeO " to " Fe2O3 is reduction reaction.

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  8. A redox reaction takes place during cellular respiration

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  9. The rust on iron surface is formed by an electrochemical reaction.

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  10. When we use old, left over cooking oil for making food stuff, it is fo...

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  11. The composition of matter reamains the same in a chemical change.

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  12. Combustion of coal in air is a reaction.

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  13. In a chamical equation, the formula of a compound can be changed.

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  14. While balancing a chemical equation, the formula of compound can be ch...

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  15. On adding zinc dust to copper sulphate solution, a displacement reacti...

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  16. Rate of a chemical reaction is proportional to the concentration of re...

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  17. In our body ,enzymes increase the rate of physiological reactions.

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  18. The ozone layer in the earth's atmosphere protects the life on earth f...

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  19. Hydrogen peroxide undergoes slow decomposition into water and oxygen.

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  20. The chemical formula of potassium chromate is K2Cr2O7

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