d2sp3 hybridisation of the atomic orbitals gives
square planar structure
triangular structure
tetrahedral structure
octahedral structure
The pH of 10-8 M HCl solution is
8
6.9586
more than 8
slightly more than 7
B.
6.9586
As HCl solution is acidic in nature and the pH of an acidic solution cannot exceed more than 7 .Thus, the answer must be 6.9586.
We can also find this answer through calculations From acid, [H+]=10-8M
But the [H+] ions from water, i.e [H+]= 10-7M cannot be neglected in comparison to 10-8M. The pH can be calculated as follows
From acid, [H+]=10-8M and from water, [H+]= 10-7 M
Total [H+]=10-8M + 10-7 M = 10-8(1+10)
= 11 × 10-8M
pH = -log [H+]
= -log( 11 × 10-8M)
= -[log11 + log 10-8)
=-[1.0414-8] = 6.9586
A group of atoms can function as a ligand only when
It is a small molecule
It has an unshared electron pair
Its a negatively charged ion
It is a positively charge ion
The process is spontaneous at the given temperature, if
ΔH is +ve and ΔS is -ve
ΔH is -ve and ΔS is +ve
ΔH is +ve and ΔS is +ve
ΔH is +ve and ΔS is equal to zero.
Mesomeric effect involves
delocalisation of π- electron
delocalisation of σ- electron
partial displacement of electrons
delocalisation of π and σ- electron
Alkali metals have negative reduction potential and hence they behave as
oxidising agents
Lewis bases
reducing agents
electrolytes
Cycloalkane formed when 1,4-dibromopentaneis heated with sodium is
methyl cyclobutane
cyclopentane
cyclobutane
methyl cyclopentane