Câu 1:

$\begin{array}{|c|c|c|}\hline &\rm C_2H_5OH&\rm C_6H_{12}O_6&\rm CH_3CHOOH\\\hline\rm Quy\ tim\ &\rm khong\ hien\ tuong&\rm khong\ hien\ tuong&\rm hoa\ do\\\hline\rm AgNO_3/NH_3,\ t^°&\rm con\ lai &\rm ↓\ Ag&×\\\hline\end{array}$

Phương trình phản ứng:

$\rm C_6H_{12}O_6+2AgNO_3+2NH_3+H_2O\xrightarrow{t^°}C_6H_{12}O_7+2NH_4NO_3+2Ag$

Câu 4:

$\rm V_{C_2H_5OH}=250×36\%=90\ (mL)$

Thể tích rượu $18^°$:

$\rm V_{C_2H_5OH\ (18^°)}=\dfrac{90}{18\%}=500\ (mL)$