Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 2>Q 77

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Oxygen exists as a diatomic molecule, but sulphur does not exist in diatomic state at room temperature, because sulphur

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Important Questions on The p-Block Elements

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 2>Q 78

Halogen that cannot show disproportionation is

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 2>Q 79

$(I) F_{2} + NaOH (dilute) \to 2 NaF + H_{2} O + X$

$(ii) F_{2} + NaOH (concentrated) \to NaF + H_{2} O + Y$

$X$ and $Y$ , respectively are:

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 2>Q 80

When

I_{2}

dissolves appreciable in aqueous solution of

Kl

forms

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 2>Q 81

Which of the following halogens will displace the halide from its solution?

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 2>Q 82

Pure

HI

is colourless, but when it is kept in a transparent bottle, it acquires colour after some time. It can be due to

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 2>Q 83

When a chloride is heated with concentrated

H_{2} {SO}_{4}

,

HCl

is obtained, but when bromide is heated, bromine gas is obtained and not

HBr

. This is because

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 2>Q 84

The solubility of halogen

(X)

in water is significantly increased by the addition of its salt. The halogen

(X)

is

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 2>Q 85

Select the periodic property or properties which is/are not regular in halogen family on moving down the group:
a. Ionisation energy
b. Electron gain enthalpy
c. Size
d. Electro negativity