Tag: the p-block elements

Questions Related to the p-block elements

On boiling an aqueous solution of $KClO _{3}$ with $I _{2}$ the products obtained are:

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

$KIO _{3} + Cl _{2}$
$KCl + I _{2}O _{5}$
$KIO _{4} + Cl _{2}$
none of the above

Bleaching action of $CaOCl _2$ is due to :

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

Nascent oxygen
$Ca$
$Cl$
$HCl$

Match the correct use for the following chemicals:

$ KClO 3 $ is used ______.

$ KClO _4 $ is used as ________.

$ Mg(ClO _4) _2 $ is used as ________.

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

$ KClO _3 $- Explosive
$ KClO _4 $- Fireworks and flares
$ Mg(ClO _4) _2 $- Dry batteries
$ KClO _3 $- Fireworks and flares
$ Mg(ClO _4 ) _2$- Explosive

Choose the correct statements:

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

The anyhdride of $HOCl$ is $Cl _2O$.
The anyhdride of $HClO _2$ is $ClO _2$.
The anyhdride of $HClO _3$ is $Cl _2O _6$.
The anyhdride of $HClO _4$ is $Cl _2O _7$.
The anyhdride of $HClO _3$ is $Cl _2O _3$.

Choose the correct oxidation states of Chlorine in species:

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

(a) $\displaystyle { HOCl }- +1$
(b) $\displaystyle { HOCl }O- +3$
(c) $\displaystyle { HOBr }- +3$
(d) $\displaystyle { HOBrO } _{ 2 }- +5$
(e) $\displaystyle { HOIO } _{ 3 }- +7$
(f) $\displaystyle { HOClO } _{ 3 }- +5$
None of the above

Select the incorrect order(s) among the following :

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

$ClO^- < BrO^- < IO^-$ - disproportionation
$ClO _4^- < BrO _4^- < lO _4^-$ - oxidising power
$HClO < HClO _2 < HClO _3 < HClO _4$ - acid strength
$HOCl > HOI > HOBr$ - acid strength

The reaction, $3ClO _{(aq.)}^-\rightarrow ClO _{3(aq.)}^-+2Cl^- _{(aq.)}$ is an example of :

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

oxidation reaction.
reduction reaction.
disproportionation.
decomposition reaction.

When bleaching powder is treated with mineral acids,the gas evolved is:

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

$Cl _2$
$O _2$
$H _2$
none of these

When Halogens are treated with hot and conc. alkalis,major products formed are:

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

Hypohalite
Halite
Halate
Halide

When bromate salt are reacted with fluorine in alkaline solution,which salt is formed?

oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

Bromide
Bromous
Hypobromous
Perbromate

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