p-Block Elements

The interhalogen compound formed from the reaction of bromine with excess of fluorine is a :

Match List I with List II :

Choose the correct answer from the options given below:

The sum of number of lone pairs of electrons present on the central atoms of $\mathrm{XeO_3}$, $\mathrm{XeOF_4}$ and $\mathrm{XeF_6}$, is ______

Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of "X" with 6-equivalents of "Y". "X" and "Y", respectively are :

The metal that has very low melting point and its periodic position is closer to a metalloid is

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

Assertion A: Boric acid is a weak acid.

Reason R: Boric acid is not able to release $\mathrm{H^+}$ ion on its own. It receives $\mathrm{OH^-}$ ion from water and releases $\mathrm{H^+}$ ion.

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

The number of non-ionisable protons present in the product B obtained from the following reactions is ______.

$\mathrm{C_2H_5OH+PCl_3\rightarrow C_2H_5Cl+A}$

$\mathrm{A+PCl_3\rightarrow B}$

Given below are two statements.

Statement I: The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases.

Statement II: Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions.

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

Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

Amongst the following, the number of oxide(s) which are paramagnetic in nature is

$\mathrm{Na_2O}$, $\mathrm{KO_2}$, $\mathrm{NO_2}$, $\mathrm{N_2O}$, $\mathrm{ClO_2}$, NO, $\mathrm{SO_2}$, $\mathrm{Cl_2O}$

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

Assertion (A) : Boron is unable to form $\mathrm{BF_6^{3-}}$.

Reason (R) : Size of B is very small.

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

Match List - I with List - II, match the gas evolved during each reaction.

Choose the correct answer from the options given below :

The number of interhalogens from the following having square pyramidal structure is :

$\mathrm{ClF_3}$, $\mathrm{IF_7}$, $\mathrm{BrF_5}$, $\mathrm{BrF_3}$, $\mathrm{I_2Cl_6}$, $\mathrm{IF_5}$, ClF, $\mathrm{ClF_5}$

White phosphorus reacts with thionyl chloride to give

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

Dinitrogen and dioxygen, the main constituents of air do not react with each other in atmosphere to form oxides of nitrogen because

Consider, PF$_5$, BrF$_5$, PCl$_3$, SF$_6$, [ICl$_4$]$^-$, ClF$_3$ and IF$_5$.

Amongst the above molecule(s)/ion(s), the number of molecule(s)/ion(s) having sp$^3$d$^2$ hybridisation is _______.

Consider the following sulphur based oxoacids.

H$_2$SO$_3$, H$_2$SO$_4$, H$_2$S$_2$O$_8$ and H$_2$S$_2$O$_7$.

Amongst these oxoacids, the number of those with peroxo (O-O) bond is _______.

The correct statement(s) related to oxoacids of phosphorous is(are)

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