Tag: chemistry

Questions Related to chemistry

Which of the following can be hydrolysed?

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

$TeF _6$
$NCl _3$
$SF _6$
Both $1$ & $2$

Which of the following is least stable?

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

$Tl{I} _{3}$
$Tl{F} _{3}$
$Pb{F} _{4}$
$Pb{I} _{4}$

Which is the correct order of decreasing basicity of halide ions?

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

${I}^{-1}> {Br}^{-}> {Cl}^{-}> {F}^{-}$
${F}^{-}> {Cl} _{-}> {Br}^{-}> {I}^{-}$
${Cl}^{-}> {Br}^{-}> {I}^{-}> {F}^{-}$
${F}^{-}> {Cl} _{-}> {I}^{-}> {Br}^{-}$

Which gas use in cooling tube in MRI tube ?

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

He
Ar
$CO _2$
$N _2$

$PbI _4$ does not exist because :

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

iodine is not a reactive
$Pb(IV)$ is oxidizing and $I^-$ is strong reducing agent
$Pb(IV)$ is less stable than $Pb(II)$
$Pb^{4+}$ is not easily formed

Halogens have:

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

high ionisation energies
high electronegativities
high electron affinities
All the above

Iodine is more soluble in aqueous solution of Kl because it forms soluble :

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

$\mathrm{K}\mathrm{I} _{2}$
$\mathrm{K}\mathrm{I} _{3}$
$\mathrm{K}\mathrm{I} _{4}$
$\mathrm{K} _{2}I _{2}$

Iodine dissolves in aqueous Kl due to the formation of:

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

$I^{-}$
$ I _{2}^{-}$
$ I _{3}^{-}$
$I _{4}^{-}$

In the reaction of $I _{2}$ with water, change in free energy is:

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

negative
positive
zero
Can't be predicted

_______ is the only member of the halogen family that has no stable isotopes.

group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

$\displaystyle F$
$\displaystyle Cl$
$\displaystyle Br$
$\displaystyle I$
$\displaystyle At$

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