List of top Chemistry Questions on Group 17 Elements

Identify the pseudohalogen from the following ions :

(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

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 major product of the following reaction is:

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

The correct order of the thermal stability of hydrogen halides (H-X) is

Stronger is oxidising agent, more is

The decreasing order of stability of oxides of halogen 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 :

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?

Which of the most volatile compounds?

Benzene reacts with chlorine in sunlight to give a final product

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.