A class consists of 7 rows. The teacher releases laughing gas, from the front row and a mischievous student releases a tear gas of molecular weight 176 from rear most. The student of which row from th

Question

A class consists of 7 rows. The teacher releases laughing gas, $N_2O$ from the front row and a mischievous student releases a tear gas of molecular weight 176 from rear most. The student of which row from the first will weep and smile simultaneously

Prashant Kotian · Accepted Answer

Correct answer: A. Molar masses: = 44, tear gas = 176 . r()/r(tear) = √(176/44) = 2 . Distance traveled by is twice that of tear gas. Out of 6 equal intervals (between 7 rows), travels 4 intervals and tear gas travels 2. Thus, they meet at Row 5 .

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