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

অ্যামোনিয়াতে নাইট্রোজেন ও হাইড্রোজেনের ভরের অনুপাত কত?

1
11 ∶ 1
2
14 ∶ 3
3
11 ∶ 3
4
14 ∶ 1
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