Question

how can we get H2SO4 and H3PO4 from S and P?​

Answer 1

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Answer 2

Correct option is

B

H

2

SO

4

is a strong oxidising agent and oxidises colourless gas to coloured vapour Y

Reactions:

2NaCl+H

2

SO

4

→Na

2

SO

4

+2HCl

and with NaI

4NaI+5H

2

SO

4

→H

2

S+2I

2

(g)+4Na

2

SO

4

+4H

2

O

3NaCl+H

3

PO

4

→Na

3

PO

4

+3HCl

and with NaI

3NaI+H

3

PO

4

→Na

3

PO

4

+3HI

This difference is because of difference between oxidising power of acids.

As sulphuric acid is more powerful oxidising agent and it will further oxidise HI to I

2

I hope that my answer will help you

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