Complete the following table and write your observations. Hydrogen Sulphide Ammonia Sulphur dioxide Hydrogen Chloride Shake the gas with red litmus solution Shake the gas with blue litmus solution Apply a burning splint to the gas

There are the following observations made, Hydrogen Sulphide Ammonia Sulphur dioxide Hydrogen chloride Shake the gas with red litmus solution No change It turns moist red litmus blue No change No change Shake the gas with blue litmus solution It turns moist blue litmus red. No change It turns moist blue litmus red It turns moist blue litmus red Apply a burning splint to the gas. No effect. No effect. No effect No effect.

Copy and complete the following table which refers to the action of heat on some carbonates: Carbonate Colour of residue on cooling Zinc carbonate Lead carbonate Copper carbonate

On heating, all the carbonates are decomposed into their respective oxides. The reactions are such as; ZnCO 3 → ∆ ZnO White + CO 2 PbC O 3 → ∆ PbO Yellow + CO 2 CuC O 3 → ∆ CuO Black + CO 2 Carbonate Colour of residue on Cooling Zinc carbonate White Lead carbonate Yellow Copper carbonate. Black

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A given white crystalline salt was tested as follows: It is dissolved in water and the resulting solution of the salt turned blue litmus red. What conclusions can be drawn for this observation ?

Important Questions on Practical Work

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Selina Icse Concise Chemistry For Class 10>Chapter 13 - Practical Work>EXERCISE-13>Q 3

A given white crystalline salt was tested as follows: Addition of barium chloride solution into this solution gave a white precipitate. What conclusions can be drawnfrom this observation ?

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Selina Icse Concise Chemistry For Class 10>Chapter 13 - Practical Work>EXERCISE-13>Q 3

A given white crystalline salt was tested as follows : A flame test on the salt gave a persistent golden-yellow colourisation. What conclusions can be drawn from this observation?

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Selina Icse Concise Chemistry For Class 10>Chapter 13 - Practical Work>EXERCISE-13>Q 4

Sodium hydroxide solution is added to solution

A

. A white precipitate is formed which is insoluble in excess sodium hydroxide solution. Name the metal ion present in solution

A

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Selina Icse Concise Chemistry For Class 10>Chapter 13 - Practical Work>EXERCISE-13>Q 4

When ammonium hydroxide is added to solution

B

, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide giving an inky blue solution. Name the cation present in solution

B

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Selina Icse Concise Chemistry For Class 10>Chapter 13 - Practical Work>EXERCISE-13>Q 4

When an ammonium salt is warmed with a sodium hydroxide solution, ammonia gas is evolved. State three ways in which you could identify this gas.

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Selina Icse Concise Chemistry For Class 10>Chapter 13 - Practical Work>EXERCISE-13>Q 5

Complete the following table and write your observations.

	Hydrogen Sulphide	Ammonia	Sulphur dioxide	Hydrogen Chloride
Shake the gas with red litmus solution
Shake the gas with blue litmus solution
Apply a burning splint to the gas

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 13 - Practical Work>EXERCISE-13>Q 7

Copy and complete the following table which refers to the action of heat on some carbonates:

Carbonate	Colour of residue on cooling
Zinc carbonate
Lead carbonate
Copper carbonate

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10th ICSE

IMPORTANT

Selina Icse Concise Chemistry For Class 10>Chapter 13 - Practical Work>EXERCISE-13>Q 8

Distinguish by a chemical test.
Sodium carbonate and sodium sulphite.

A given white crystalline salt was tested as follows: It is dissolved in water and the resulting solution of the salt turned blue litmus red. What conclusions can be drawn for this observation ?

Important Questions on Practical Work

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