Physical Properties of Boron Family
- Borazine and MeBr
- Borazine and MeMgBr
- Boron nitride and MeBr
- Diborane and MeMgBr
In which of the following elements +1 oxidation state is more stable than +3 oxidation state?
The element which exists as a liquid upto 2000∘C & can be used in high temperature thermometry is
Which of the following statements is false?
The sums of the three ionization enthalpies of each group 13 element follow the order
The stability of +3 oxidation state in group 13 elements follows the order.
The correct order of atomic radii of group 13 elements is
Group 13 consists of p-block elements
Which of the following is/are semiconductors?
Al&Ga have nearly the same constant radii because of
Greater shielding effect of s electrons of Ga atoms
Poor shielding effect of s electrons of Ga atoms
Greater shielding effect of d electrons of Ga atoms
Poor shielding effect of d electrons of Ga atoms
Soft heavy metal melts at 30∘ C and is used in making heat sensitive thermometers the metal is
The order in which the atomic radius increases is as follows
Both the amorphous and crystalline forms of boron are very reactive in air.
In the extraction of aluminium, the function of cryolite is to:
Remove impurities from alumina
Lower the melting point of alumina
Minimise the anodic effect
Increase the melting point of alumina