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Tests for Sulphuric Acid

The original ...

Question

The original colour of potassium dichromate is :

A

blue

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B

red

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C

orange

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D

green

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Solution

The correct option is C
orange

Potassium dichromate is an orange solution; the orange color is due to dichromate ions

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Q. _____ ion turns the orange coloured acidified potassium dichromate solution into green.

Q. When sulphur dioxide gas is passed through acidified potassium dichromate solution, the colour of the solution changes from :
(1) orange to yellow
(2) orange to green
(3) green to orange
(4) yellow to green

Q. Assertion :Oxidation of alcohol with acidified potassium dichromate can be used for identification of alcohol. Reason: During oxidation with acidified potassium dichromate orange colour of

K_{2} C r_{2} O_{7}

changes to blue.

Q. If green means red, red means yellow, yellow means blue, blue means orange and orange means green, what is the colour of clean sky?

The elements of sets A , B and C are all colours as follows:

A = { Red , Orange , Yellow , Brown } ,

B = { Blue , Yellow , Green , Brown } ,

C = { Black , Brown , White , Grey }

Then, A U B U C is

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