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Q.

Choose the correct statements:

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a

Fluorine can be prepared from fluorides by chemical oxidation using MnO2

b

Anhydrous HCl is a good conductor of electricity than aq HCl

c

Dry chlorine does not bleach clothes

d

Colour of KI solution containing starch turns blue when chlorine water is added.

answer is C.

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Detailed Solution

A) False EF2/F0 = maximum so can not be oxidized.
B) False : HCl(aq) → H+ + Cl- is good conductor due to ions. 
C) True : H2O + Cl2  → 2HCl + (O) nascent oxygen 
D) True : Chlorine being more reactive displaces iodine from KI. Iodine is absorbed by starch and thus blue colour is developed 
2KI + Cl2  → 2KCl + I2 
I2 + Starch → Blue colour

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