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प्रश्न
L, M and N are three elements with atomic numbers 13, 7 and 10 respectively. Answer the following question using only the alphabets given. Do not identify the elements.
Which element can combine with hydrogen to form a gas which produces dense white fumes with concentrated HCl?
अति संक्षिप्त उत्तर
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उत्तर
Element M (atomic number 7) is the one that combines with hydrogen to form a gas (ammonia), which produces dense white fumes with concentrated HCl.
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