MCQ · ঢাকা বিশ্ববিদ্যালয় ভর্তি পরীক্ষা · ২০২২
CO₂-এর সমইলেকট্রন বিশিষ্ট আয়নটি হলো-
- কNO⁻
- খO₃⁻
- গClO⁻
- ঘN₃⁻
সঠিক উত্তর: ঘ) N₃⁻
ব্যাখ্যা
CO₂ এ ইলেকট্রন সংখ্যা = 6 + 2×8 = 22; N₃⁻ এ = 3×7 + 1 = 22; অন্যগুলো: NO⁻ = 16, O₃⁻ = 25, ClO⁻ = 26।
এই বিষয়ের আরও প্রশ্ন
- Which of the following is not a synonym for 'speculate'?
- Identify the sentence with correct punctuation marks:
- She says, "I had a headache yesterday." Which of the following is its indirect speech form?
- What is the antonym of the word 'pernicious'?
- Which of the following words has been properly spelled?
- Those who are vulnerable are _____.
- Rahat will be going to the US, _____ she?
- For myself, I chose the cheapest dish on the menu _____ a mutton chop.