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(A) Aqueous solution of chlorine is a bl...

(A) Aqueous solution of chlorine is a bleaching agent
(R ) In presence of moisture ,chlorine liberates nascent oxygen which remove the colour of organic matter

A

Both (A) and (R ) are true and (R ) is the correct explanation of (A)

B

Both (A) and (R ) are true and (R ) is not the correct explanation of (A)

C

(A) is true but (R ) is false

D

Both (A) and (R ) are false

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The correct Answer is:
A
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Chlorine acts as a bleaching agent only in the presence of

Chlorine acts as a bleaching agent only in the presence of moisture - explain.

Bleaching action of chlorine in presence of moisture is an example of

(A) : Chlorine acts as a bleaching agent in the presence of moisture (R) : Chlorine forms hypochlorous acid in the presence of moisture.

When Cl_(2) water is added to an aqueous solution of KI in presence of CHCl_(3) a violet colour is obtained on adding more of Cl_(2) - water, the violet colour disappears and a colourless solution is obtained, this test confirms the presence of which of the following in solution.

A basic volatile compound gave a foul smelling gas when treated with CHCl_(3) and alc. KOH. A 0.295 g sample of the substance dissolved in aqueous HCl and treated with NaNO_(3) solution at 0^(@)C liberated a colourless, odourless gas whose volume corresponds to 112 ml at STP. After the evolution of gas was complete, the aqueous solution gave an organic liquid which did not contain nitrogen and on boiling with I_(2) in the presence of alkali gave a yellow precipitate. The molecular weight of the basic volatile compound is

A basic volatile compound gave a foul smelling gas when treated with CHCl_(3) and alc. KOH. A 0.295 g sample of the substance dissolved in aqueous HCl and treated with NaNO_(3) solution at 0^(@)C liberated a colourless, odourless gas whose volume corresponds to 112 ml at STP. After the evolution of gas was complete, the aqueous solution gave an organic liquid which did not contain nitrogen and on boiling with I_(2) in the presence of alkali gave a yellow precipitate. The compound must contain

AAKASH SERIES-VII GROUP ELEMENTS-OBJECTIVE EXERCISE -4
  1. (A) Iodine does not react with water (R ) Reaction of iodine with wa...

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  2. (A) Fluorine exhibits only -l oxidation state (R ) Fluorine is calle...

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  3. (A) Among HX , HF is liquid while others are gases (R ) HF has stro...

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  4. (A) In HX , stability decreases down the group (R ) Bond dissociatio...

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  5. (A) Iodine oxides are more stable than chlorine and bromine oxides (...

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  6. (A) I(2)O(5) is used for the estimation of carbon monoxide in qualitat...

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  7. (A) SnCl(4) is more covalent than SnCl(2) (R ) Compound with higher...

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  8. (A) Sea is the greatest source of some halogens (R ) Halogens are h...

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  9. (A) Aqueous solution of chlorine is a bleaching agent (R ) In presen...

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  10. (A) Reaction of Cl(2) with hot and concen -trated NaOH is disproportio...

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  11. (A) The noble metals like gold ,platinum dissolved in aqua regia (R ...

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  12. (A) With HCl ,Fe forms FeCl(2)andH(2) (R ) Formed H(2) prevents the ...

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  13. (A) Fluorine forms only one oxyacid HOF (R ) Fluorine has small size...

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  14. (A) Acidic nature increases from HOCl to HClO(4) (R ) Oxidation num...

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  15. (A) Hydrolysis of BrF(3) gives HF and HBrO(2) (R ) In the hydrolysis...

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  16. (A) IF(7) is the highest numbered inter halogen compound (R ) Radius...

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  17. (A) HCl most volatile hydrogen halide (R ) HCl has lowest boiling po...

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  18. (A) Aqueous chlorine turns blue litmus to red (R ) Aquous chlorine i...

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  19. (A) Pka value of HF is positive (R ) HF is strongest acid among HX

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  20. (A) IC l more reactive than F(2) (R ) I-Cl bond is weaker than F-F ...

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