defence exam Agniveer Army Tradesman Mock Test Series 2025 General Science Chemistry Equilibrium

নিম্নলিখিত কোনটি নীল লিটমাসকে লাল করে?

1
CH3OH
2
CH3COOH
3
HCOOH
4
একটির বেশি বিকল্প সঠিক
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