NF3 and BF3 both are covalent , but BF3 is non-polar, while NF3 is polar because :
boron is non-metal in free state , while N2 is gas
there is no dipole moment in B-F bond while N-F bond have some dipole moment
BF3 is planar while NF, is pyramidal
boron atom is smaller than nitrogen atom
In a group of Periodic Table what is the basis of :
ionic potential
electron affinity
electron negativity
number of covalent electron
The solubility of AgCl is 1.435 g/L. What will be the solubility product ?
10-4
0.01
0.001
0.001
If two elements X and Y have 3 and 6 electrons in its outermost shell , then the molecular formula of compound formed by the combination of X and Y :
XY
X3Y
X2Y
X2Y3
The number of H+ ion in half normal solution of Na2CO3 and CH3COOH :
> 10-7 m
10-7 m
< 10-7
10-5 m
The correct electronic configuration of element with atomic number 29 :
1s2 , 2s2 2p6 , 3s2 3p6 3d10 , 4s1
1s2 , 2s2 2p6 , 3s2 3p6 3d11
1s2 , 2s2 2p6 , 3s2 3p17
None of the above
A.
1s2 , 2s2 2p6 , 3s2 3p6 3d10 , 4s1
The correct electronic configuration of element with atomic number = 29
1s2 , 2s2 2p6 , 3s2 3p6 3d10 , 4s1