railway RRB Group D Mock Test Series 2024-25 General Science Chemistry

কোন গ্যাসটি ভোপাল গ্যাস ট্র্যাজেডির কারণ হয়েছিল?

1
CH3C = N = S
2
CH3 - N = C = S
3
CH3-N = C = O
4
CH3-O - N = C
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