A) Calcium chloride, potassium carbonate
B) Calcium oxide, hydrochloric acid
C) Carbon monoxide, ammonia
D) Carbon dioxide, nitrous oxide
Correct Answer: D
Solution :
Carbon dioxide and nitrous oxide have the same formula unit mass. Option \[CaC{{l}_{2}}=40+71=111\] \[{{K}_{2}}C{{O}_{3}}=(39\times 2)+12+(16\times 3)\] \[=78+12+48=138\] Option \[CaO=40+16=56\] \[HCl=1+35.5=36.5\] Option \[CO=12+16=28\] \[N{{H}_{3}}=14+3=17\] Option \[C{{O}_{2}}=12+16\times 2=44\] \[{{N}_{2}}O(14\times 2)+16=44\]
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