What products are formed when $1 \ mol$ of calcium phosphide reacts with an excess of water?

The function $f(x) = |px - q| + r|x|,$ $x \in ( - \infty, \infty )$ where $p > 0, q > 0, r > 0$ assumes its minimum value only at one point if

Which of the following pairs represents linkage isomerism?

Anxiety and eating spicy food together in an otherwise normal human may lead to:

The freezing point of a $1.00 \, m$ aqueous solution of $HF$ is $-1.91^o C$. The freezing point depression constant of water $K_f$ is $1.86 \, K \, kg \, mol^{-1}$. The percentage of dissociation of $HF$ at this concentration is ......... $\%$

$A$ $500\,\mu F$ capacitor is charged at a steady rate of $100\,\mu C/s$. The potential difference across the capacitor will be $10\,V$ after an interval of $......\,s$.