List of top Chemistry Questions on p -Block Elements

Carborundum is obtained when silica is heated at high temperature with

Carbon monoxide is absorbed by

Carbogen is

Buckminsterfullerene is

Bromine gas turns starch iodine paper

Boron halides behave as Lewis acids because they

Boron reacts with NaOH to form

Borax is not used

Boric acid is prepared from borax by the action of

Boron does not form $B^{3+}$ ions whereas Al forms $Al^{3+}$ ions. This is because

Bond dissociation enthalpy of $E?? (E =$ element$)$ bonds is given below. Which of the compounds will act as strongest reducing agent ?

Boiling points of the hydrogen halides

Bleaching action of $ {SO_2}$ is due to

Bleaching action of $SO_2$ is due to its

$BF_3$ on hydrolysis gives

$ {BCl_3}$ does not exist as dimer but $ {BH_3}$ exists as dimer $ {(B_2H_6)}$ because

$ {BCl_3}$ is planar molecule because in this molecule boron is

At ordinary temperature and pressure, chlorine is a gas, bromine' is a liquid and iodine is a solid because

In vapour state sulphur is paramagnetic in nature. In vapour state sulphur exists as $S_2$ molecule.

Fullerenes are the only pure form of carbon. It contains twenty, five-membered rings and twelve, six-membered rings.

Diamond is the hardest substance on the earth. It has high melting point.

$CO_{2}$ is a gas at room temperature while $SiO_{2}$ is a crystalline solid. $SiO_{2}$ is a network of silicon and oxygen atoms joined by multiple bonds.

Catenation tendency is weaker in nitrogen. Nitrogen exists as diatomic gas.

Carbon atom is tetravalent though it has two unpaired electrons. Carbon has unique ability to form $p\pi-p\pi$ multiple bonds with itself like $C=C, C\equiv C$.

Carbon monoxide is a poisonous gas. Carbon monoxide combines with haemoglobin to form carboxy-haemoglobin which prevents absorption of oxygen by it.