Question

do only no.4 plz
be fast​

Answer 1

rust is an high acidic solutions

Answer 2

See....We know that Rust is the oxidised form of Iron (Fe2O3).

**ALL METAL OXIDES ARE BASIC IN NATURE**

THEREFORE RUST IS ALSO A BASE..

And bases always turn red litmus paper into blue.

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I HOPE THIS HELPED YOU ❤❤❤