State your observations for the following cases- Moist blue litmus is introduced into a gas jar of Sulphur dioxide- Dry red rose petals are placed in the jar of Sulphur dioxide- Paper soaked in Potassium permanganate solution is introduced in to gas jar of Sulphur dioxide-

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Standard X

Chemistry

Tests for Sulphuric Acid

State your ob...

Question

State your observations for the following cases
(ⅰ ) Moist blue litmus is introduced into a gas jar of Sulphur dioxide.
(ⅱ) Dry red rose petals are placed in the jar of Sulphur dioxide.
(ⅱⅰ) Paper soaked in Potassium permanganate solution is introduced in to gas jar of Sulphur dioxide.

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Solution

Effect of Sulphur dioxide
(ⅰ ) Moist blue litmus turns red and finally colourless as Sulphur dioxide act as an acidic gas and then a bleaching agent.
(ⅱ) When rose petals are placed in a jar of Sulphur dioxide, they get decolourised. This is because Sulphur dioxide is good reducing agent. But since rose petals are dry, so they will not get decolourised.
(ⅱⅰ) The pink colour of Potassium permanganate soaked paper turns colourless , because of bleaching property of Sulphur dioxide.
So due to bleaching and reducing agent property of Sulphur dioxide, the blue litmus turns into red, dry rose petals get decolourised and pink colour of Potassium permanganate paper to colourless.

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Similar questions

State your observation for the following cases:
(i) Moist blue litmus is introduced into a gas jar of sulphur dioxide.
(ii) Dry red rose petals are placed in the jar of sulphur dioxide.
(iii) Paper soaked in potassium permanganate solution is introduced into a gas jar of sulphur dioxide.

Q. Four gas jars filled with sulphur dioxide gas were inverted into troughs of water by four students and the following observations and inference were reported:

(a) Water did not enter the gas jar and sulphur dioxide is insoluble in water.
(b) A Small amount of water entered the gas jar slowly and sulphur dioxide is sparingly soluble in water.
(c) Water rushed into the gas jar and sulphur dioxide is highly soluble in water.
(d) Water did not enter the gas jar and sulphur dioxide is soluble in water.

The correct set of observations and inference drawn is reported in :
(1) (a)
(2) (b)
(3) (c)
(4) (d)

Q. Which one of the following procedures is correct to detect the acidic nature of SO₂ gas?
(1) Insert wet blue litmus paper in a gas jar filled with SO₂gas
(2) Insert wet red litmus paper in a gas jar filled with SO₂ gas
(3) Insert dry blue litmus paper in a gas jar filled with SO₂gas
(4) Insert dry red litmus paper in the gas jar filled with SO₂ gas

Q. State what would you observe when a piece of moist red litmus paper is placed in a gas jar of ammonia.

Which of the following observation is correct when red rose petals are placed in the jar of sulphur dioxide?

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State your observations for the following cases(ⅰ ) Moist blue litmus is introduced into a gas jar of Sulphur dioxide.(ⅱ) Dry red rose petals are placed in the jar of Sulphur dioxide.(ⅱⅰ) Paper soaked in Potassium permanganate solution is introduced in to gas jar of Sulphur dioxide.

State your observations for the following cases
(ⅰ ) Moist blue litmus is introduced into a gas jar of Sulphur dioxide.
(ⅱ) Dry red rose petals are placed in the jar of Sulphur dioxide.
(ⅱⅰ) Paper soaked in Potassium permanganate solution is introduced in to gas jar of Sulphur dioxide.