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(A) Halogens are coloured (R ) Colour ...

(A) Halogens are coloured
(R ) Colour is a characristic property of elements of d- block

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

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-VII GROUP ELEMENTS-OBJECTIVE EXERCISE -4
  1. (A) : Fluorine is the best oxidising agent (R ) SRP is highest for F...

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  2. OF^(-) does not exist , though HOF is known (R ) HOF molecule does n...

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  3. (A) Halogens are coloured (R ) Colour is a characristic property of ...

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  4. (A) Bond energy of Cl(2) is less than that of F(2) (R ) Bond energy ...

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  5. (A) Hydration energy of iodide is highest among halides (R ) Greater...

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  6. (A) Highest atomicity of an interhalogen compound is 8 (R ) Highest ...

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  7. (A) Fluoride is oxidised by managanese dioxide (R ) Manganese dioxid...

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  8. (A) Iodine is dissolved well in aqueous KI solution (R ) Iodine form...

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  9. (A) Compared to Br(2),Icl is more reactive (R ) Br(2) is non -polar ...

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  10. (A) Chlorine dioxide is paramagnetic (R ) Chlorine dioxide molecule...

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  11. (A) F-F bond is stronger than Cl -Cl bond (R ) Atomic size of F is l...

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  12. (A) Perhalate ions are tetrahedral in shape (R ) Halogens underdo sp...

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  13. (A) Iodine is least basic whereas fluorine is most basic , among halog...

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  14. F(2) shows disproportionation reactions (R ) F(2) is the weakest oxi...

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  15. (A) The bleaching of flowers by chlorine is permanent while that by SO...

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  16. (A) Halogens have maximum negative electron gain enthalpy in the respe...

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  17. (A) Electron gain enthalpy of fluorine is less than chlorine but fluor...

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  18. (A) Iodine does not react with water (R ) Reaction of iodine with wa...

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

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

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