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List of top Chemistry Questions on Group 17 Elements

Identify the pseudohalogen from the following ions :
The standard free energy change \((ΔG°)\) for \(50%\) dissociation of \(N_2O_4\) into \(NO_2\) at \(27°C\) and 1 atm pressure is \(x\ J mol^{–1}\). The value of \(x\) is _____. (Nearest Integer)
[Given : \(R = 8.31\ JK^{–1} mol^{–1}\), \(log\ 1.33 = 0.1239\), \(ln\ 10 = 2.3\)]
The correct order of bond dissociation enthalpy of halogens is :
Atomic number of an element is 17 then the period to which this element belongs
The major product of the following reaction is:
Alternative_Text
The copper (II) halide which does not exist is
$KO _{2}$, reacts with water to form $A, B$ and $C .$ $B$ forms $C$ when it reacts with iodine in basic medium. What are $B$ and $C$ respectively?

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

Assertion (A) : \(I_2O_5\) is used to detect CO.

Reason (R) : In \(I_2O_5\), the oxidation number of I is +5.

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

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

Assertion (A) : Bond energy of \(F_2\) is lesser than \(Cl_2\). 

Reason (R) : F-atom is smaller in size than Cl.

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

Which of the following has zero net dipole moment?
In the clathrates of xenon with water, the nature of bonding between xenon and water molecule is
The correct order of the thermal stability of hydrogen halides (H-X) is
Stronger is oxidising agent, more is
The variation of the boiling points of the hydrogen halides is in the order $HF > HI > HBr > HCl$. What explains the higher boiling point of hydrogen fluoride ?
The least number of oxyacids are formed by :
The decreasing order of stability of oxides of halogen is
Tincture of iodine is
Which of the following hydrogen bonds are strongest in vapour phase?
The formula of chloral is
The $M - O - M$ bond angles in $M_2O$ (where $M$ is halogen) is in the order
Which of the following displaces $Br _{2}$ from an aqueous solution containing bromide ions?
Benzene reacts with chlorine in sunlight to give a final product
Which of the most volatile compounds?
$A$ when added to silica will give $B A$ and $B$ are
: $F-F$ bond in $F _{2}$ molecule is strong. : $F$ atom is small in size.

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