For the following:

i) H3PO4 > H3AsO4 > H3SbO4
ii) H2Te > H2Se > H2S > H2O
iii) HCl > HBr > HI
iv) SbH3 > AsH3 > PH3 > NH3

The order of acidity is correct for which series?
1. ) all are correct
2. ) i and ii
3. )i, ii and iv
4. ) ii, iii
5. ii, iv

I know the ii and iv are right....but i dunno about number i ? :S
can someone help me and confirm my answers?

1 answer

You are correct that ii and iv are correct. i is also correct.