Group 17

Correct statement(s) about the compounds X, Y and Z is(are)

$\ce{MnO2 + Conc. HCl -> MnCl2}$ + X (greenish yellow gas) + $\ce{H2O}$

$\ce{NH3}$ + X (excess) $\longrightarrow$ Y + HCl

X + $\ce{F2}$ (excess) $\xrightarrow{573\ \mathrm K}$ Z

Given below are two statements :

Statement (I) : Oxidising power of halogens decreases in the order $\ce{F2} > \ce{Cl2} > \ce{Br2} > \ce{I2}$, which is the basis of "Layer test".

Statement (II) : "Layer test" to identify $\ce{Br2}$ and $\ce{I2}$ in aqueous solution involves the oxidation of bromide or iodide into $\ce{Br2}$ or $\ce{I2}$ respectively with $\ce{Cl2}$, which is a type of displacement redox reaction.

In the light of the above statements, choose the correct answer from the options given below :

The reaction of $\ce{HClO3}$ with HCl gives a paramagnetic gas, which upon reaction with $\ce{O3}$ produces

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Flourine forms one oxoacid.

Reason R: Flourine has smallest size amongst all halogens and is highly electronegative.

In the light of the above statements, choose the most appropriate answer from the options given below.

Match List - I with List - II :

Choose the correct answer from the options given below :

Concentrated $\mathrm{HNO_3}$ reacts with Iodine to give

Ozonolysis of $\ce{ClO2}$ produces an oxide of chlorine. The average oxidation state of chlorine in this oxide is ____.

With respect to hypochlorite, chlorate and perchlorate ions, choose the correct statement(s).

The correct statement(s) about the oxoacids, $\ce{HClO4}$ and $\ce{HClO}$, is(are)

The colour of the $\ce{X2}$ molecules of group 17 elements changes gradually from yellow to violet down the group. This is due to

The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are :

The non-metal that does not exhibit positive oxidation state is :

The correct statement(s) regarding, (i) HClO, (ii) $\ce{HClO2}$, (iii) $\ce{HClO3}$ and (iv) $\ce{HClO4}$, is(are)

Which among the following is the most reactive ?

The least number of oxyacids are formed by :

Chlorine water on standing loses its colour and forms :

Consider the following list of reagents:

Acidified $\ce{K2Cr2O7}$, alkaline $\ce{KMnO4}$, $\ce{CuSO4}$, $\ce{H2O2}$, $\ce{Cl2}$, $\ce{O3}$, $\ce{FeCl3}$, $\ce{HNO3}$ and $\ce{Na2S2O3}$.

The total number of reagents that can oxidise aqueous iodide to iodine is

Among the following oxoacids, the correct decreasing order of acid strength is :

The correct statement for the molecule, $\ce{CsI3}$, is :

P and Q, respectively, are the sodium salts of