Question

How to identify?.....

Answer 1

I guess it is option 4 because it has methonoic alcohol which is more acidic in nature and poisonous and should not be consumed it is a denatured spirit and option 2

Reactivity Series

Potassium

Calcium

Sodium

Magnesium

Zinc

Iron

Lead

TIn

Hydrogen

Copper

Mercury

Silver

Gold

Platinum

Answer 2

here is your answer

to identifycompounds are acidic in nature you need to learn reactive series.