A) \[{{\operatorname{NH}}_{3}}+NaN{{O}_{3}}\]
B) \[{{N}_{2}}O+Cu\]
C) \[N{{H}_{4}}Cl+NaN{{O}_{2}}\]
D) \[(N{{H}_{4}})C{{r}_{2}}{{O}_{7}}\]
Correct Answer: D
Solution :
[d]| Pure nitrogen can be obtained from |
| \[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\to {{N}_{2}}+C{{r}_{2}}{{O}_{3}}+4{{H}_{2}}O\] |
| Other reaction are as follows which contains impurities in very small amounts. |
| \[N{{H}_{3}}+NaN{{O}_{3}}\to NaOH+2HNO\] |
| \[{{N}_{2}}O+Cu\to CuO+{{N}_{2}}\] |
| \[N{{H}_{4}}Cl+NaN{{O}_{2}}\to {{N}_{2}}+NaCl+2{{H}_{2}}O\] |
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