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Name - The gas which turns acidified pot...

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

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Sulphur dioxide .
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A gas which turns acidified potassium dichromate green.

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.

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

Identify the anion present in the following compounds : Compound Z which on reacting with dilute sulphuric acid liberates a gas which turns lime water milky, but the gas has no effect on acidified potassium dichromate solution.

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 :

Identify the anion present in the following compounds: i] Compound X on heating with copper turnings & conc. sulphuric acid liberates a reddish brown gas. ii] When a solution of compound Y is treated with silver nitrate solution a white precipitate is obtained which is soluble in excess of ammonium hydroxide solution. iii] Compound Z which on reacting with dilute sulphuric acid liberates a gas which turns lime water milky, but the gas has no effect on acidified potassium dichromate solution. iv] Compound L on reacting with barium chloride solution gives a white precipitate insoluble in dilute hydrochloric acid or dilute nitric acid.

Identify the anion present in each of the following compounds : A salt D on treatment with dilute sulphuric acid produces a gas which turns lime water milky but has no effect on acidified potassium dichromate solution.

Choose the correct word from the brackets to complete the sentences. Sulphur dioxide turns _______ (acidic/alkaline) potassium dichromate paper green.

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

ICSE-SAMPLE QUESTION PAPER -4-SECTION - II
  1. Name - The gas which turns acidified potassium dichromate clear green.

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  2. Some properties of sulphuric acid are listed below. Choose the propert...

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  3. Some properties of sulphuric acid are listed below. Choose the propert...

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  4. Some properties of Sulphuric acid are listed below . Choose the pro...

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  5. Some properties of sulphuric acid are listed below. Choose the propert...

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  6. Some properties of sulphuric acid are listed below. Choose the propert...

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  7. The following is a sketch of an electrolytic cell used in the extracti...

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  8. The following is a sketch of an electrolytic cell used in the extracti...

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  9. The following is a sketch of an electrolytic cell used in the extracti...

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  10. The following is a sketch of an electrolytic cell used in the extracti...

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  11. Following is the sketch of electrolytic cell used in the extraction ...

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  12. Copy and Complete the following table related to electrolysis :

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  13. Differentiate between the terms strong electrolyte and weak electrolyt...

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  14. Choose the most appropriate answer from the following list of oxides w...

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  15. Calculate the percentage of Nitrogen in aluminium nitride . (Al = 27...

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  16. A compound has the following percentage composition by mass: Carbon - ...

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  17. Dilute nitric acid is generally considered a typical acid but not so i...

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  18. Concentrated nitric acid appears yellow when it is left standing in a ...

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  19. Explain the following : All glass apparatus is used in the labo...

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  20. With respect to the laboratory preparation of hydrochloric acid ans...

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  21. With respect to the laboratory preparation of hydrochloric acid ans...

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