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A gas which turns acidified potassium di...

A gas which turns acidified potassium dichromate green.

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Sulphur dioxide
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Name the gas in each of the following: (i) A gas which turns acidified potassium dichromate clear green. (ii) The gas produced on reaction of dilute sulphuric acid with a metallic sulphide.

Name - The gas which turns acidified potassium dichromate clear green.

The gas obtained by roasting of sulphide ore is reacted with acidified potassium dichromate. A green colored compound 'X' is formed. The compound X can be :

Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions. Tabulate your answers in the format given below: (i) When silver nitrate solution is added to a solution of A, a white precipitate, insoluble in dilute nitric acid, is formed. (ii) Addition of dilute hydrochloric acid to B produces a gas which turns lead acetate paper black. (iii) When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test-tube, a brown ring is formed. (iv) When dilute sulphuric acid is added to D a gas is produced which turns acidified potassium dichromate solution from orange to green. (v) Addition of dilute hydrochloric acid to E produces an effervescence. The gas produced turns lime water milky but does not affect acidified potassium dichromate solution.

Potassium dichromate is prepared from

Sulphur dioxide turns acidified potassium dichromate ............... .

In the oxidation of ethanol with acidified potassium dichromate, the final product is____ (acetic acid/formic acid)

Identify the salts P, Q, R from the observation Salt P has light bluish green colour. On heating, it produces a black coloured residue. Salt P produces brisk effervescence with dil. HCl and the gas evolved turns lime water milky, but no action with acidified potassium dichromate solution.

Write balanced chemical equations for the Ethanol under high pressure and low temperature is treated with acidified potassium dichromate.

Name the compound which is responsible for the green coloration when sulphur dioxide is passed through acidified potassium dichromate solution.

ICSE-SAMPLE QUESTION PAPER 03-SECTION II
  1. A gas which turns acidified potassium dichromate green.

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  2. The following question relate to the extraction of aluminium by electr...

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  3. The following question relate to the extraction of aluminium by electr...

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  4. The following question relate to the extraction of aluminium by electr...

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  5. The following question is related to Iron: Name the acid with which ...

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  6. The following question are related to Iron: Name an alloy of iron an...

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  7. The following question are related to Iron: Name the process by whic...

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  8. Complete the following statements using proper words: In a thermit...

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  9. Complete the following statements using proper words: In dry cells,...

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  10. Use the letters only written in the Periodic Table given below to ans...

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  11. Use the letters only written in the Periodic Table given below to ans...

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  12. Use the letters only written in the Periodic Table given below to ans...

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  13. Use the letters only written in the Periodic Table given below to ans...

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  14. Arrange the following as per the instructions given in the brackets: ...

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  15. Arrange the following as per the instructions given in the brackets: ...

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  16. Arrange the following as per the instructions given in the brackets :...

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  17. Arrange the following as per instructions given in the brackets: Cl,...

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  18. By drawing an electron dot diagram, show the lone pair effect leading...

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  19. Identify the acid which matches the following description : Give bal...

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  20. Name a yellow monoxide that dissolves in hot and concentrated alkali. ...

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  21. Study the figure given below and answer the questions that follow : ...

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