The first order rate constant for dissociation of N2O5 is 6.2 x 10-4 s-1 .The half-life period (in s) of this dissociation will be :
1117.7
111.7
223.4
160.9
The IUPAC name of the compound :
is :
2 - ethyl - 2 - methyl - 3 - hexanone
5 - ethyl - 5 - methyl - 4 - hexanone
5 , 5 - dimethyl - 4 - heptanone
3 , 3 - dimethyl - 4 - heptanone
The gas phase reaction of nitric oxide and bromine yields nitrosyl bromide :
2NO (g) + Br2 (g) 2NOBr (g)
The rate law is rate = k[NO]2[Br2]
The overall reaction order is :
1
2
3
4
CO binds itself to metal atoms through :
carbon atom only
oxygen atom only
carbon and oxygen atom
does not bind
A.
carbon atom only
The bonding in CO is represented as c O .
In the CO , carbon atom contains one lone pair of electrons and oxygen atom does not ,therefore CO binds itself to metal atom through carbon atom only .
In the periodic table actinides occupy :
III B group in 7th row
III B group in 6th row
III B group in 5th row
None of the above
During electrochemical process :
Gibbs free energy increases
Gibbs free energy remains constant
no prediction can' be made about Gibbs free energy
Gibbs free energy decreases
At same temperature which pair of the following solutions are isotonic ?
0.2 M BaCl2 and 0.2 M urea
0.1 M urea and 0.1 M NaCl
0.1 M NaCl and 0.1 M K2SO4
0.1 M Ba(NO3)2 and 0.1 M Na2SO4
Why Sc (Z = 21) is not considered as transition element ?
Properties of Sc are similar to alkali metals
3d - orbitals are empty in its stable compound
Stable oxidation number of Sc is +2
Atomic volume of Sc is very large