সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Which one of the following metals reacts very rapidly with water at room temperature?
Which one of the following metals reacts very rapidly with water at room temperature?
- ক. magnesium
- খ. calcium
- গ. beryllium
- ঘ. potassium
সঠিক উত্তরঃ calcium
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Basic Information of Daily Science, Inventions and...