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

$A, B$ and $C$ are three points in a uniform electric field as shown in the figure. The electric potential is

An air bubble of radius $1 \ cm$ rises from the bottom portion through a liquid of density $1.5 \ g/cc$ at a constant speed of $0.25 \ cm/s$. If the density of air is neglected,the coefficient of viscosity of the liquid is approximately,(in $Pa \cdot s$):

If the circle $x^2 + y^2 = a^2$ intersects the hyperbola $xy = c^2$ in four points $P(x_1, y_1), Q(x_2, y_2), R(x_3, y_3), S(x_4, y_4)$,then:

$DNA$ fingerprinting refers to

Which one of the following elements reacts with steam?