MCQ
Which of the following aqueous solution has highest freezing point ?
- A$0.12\, m-Ca(NO_3)_2$ solution
- B$0.15\, m-NaCl$ solution
- ✓$0.2 \,\,m-$urea solution
- D$0.2 \,\,m-$CH_3COOH solution
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$(A)$ A secondary alcohol on oxidation gives a ketone
$(B)$ Ethanol reacts with conc. ${H_2}S{O_4}$ at ${180\,^o}C$ to yield ethylene
$(C)$ Methanol reacts with iodine and sodium hydroxide to give a yellow precipitate of iodoform
$(D)$ Hydrogen gas is liberated when sodium is added to alcohol. Select the correct statements from the above set:
$NO_2^+ \to NO_2 \to NO_2^-$