What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH1), sodium sulphide (pH2), sodium selenide (pH3) and sodium telluride (pH4)?
pH1 > pH2 = pH3 =pH4
pH1 <pH2 < pH3 <pH4
pH1 < pH2 > pH3< pH4
pH1> pH2 > pH3 > pH4
HF is not preserved in glass bottle because :
it reacts with the visible part of the light
it reacts with the sodium oxide of the glass
it reacts with the aluminium oxide of the glass composition
it reacts with SiO2 of the glass
Which of the following is not hydrolysed ?
AsCl3
PF3
SbCl3
NF3
D.
NF3
Nitrogen forms NF3 ; the electron donating tendency is minimum in NF3 .It is not hydrolysed because in NF3 due to absence of 2d - orbital in N atom ,it cannot accept electron from H2O for hydrolysis of NF3 .
Which acid has P - P linkage?
Hypophosphoric acid
Pyrophosphoric acid
Metaphosphoric acid
Orthophosphoric acid
Which statement is wrong for NO ?
It is anhydride of nitrous acid
Its dipole moment is 0.22 D
It forms dimer
It is paramagnetic