Which type of drug is obtained from opium?

If $\alpha, \beta, \gamma$ are the roots of $x^3+4x+1=0$,then the equation whose roots are $\frac{\alpha^2}{\beta+\gamma}, \frac{\beta^2}{\gamma+\alpha}, \frac{\gamma^2}{\alpha+\beta}$ is

The potential difference between $A$ and $B$ in the figure is ................. $V$.

Which of the following elements constitutes a major impurity in pig iron?

What is the concentration of nitrate ions $(NO_3^-)$ if equal volumes of $0.1 \ M \ AgNO_3$ and $0.1 \ M \ NaCl$ are mixed together (in $M$)?

What are $\underline{A}, \underline{B}, \underline{C}$ in the following reactions?
$(I)$ $(CH_3 CO_2)_2 Ca \xrightarrow{\Delta} \underline{A}$
$(II)$ $CH_3 CO_2 H \xrightarrow[Red\ P]{HI} \underline{B}$
$(III)$ $2 CH_3 CO_2 H \xrightarrow{P_4 O_{10}} \underline{C}$
$\underline{A} \quad \underline{B} \quad \underline{C}$