Which alga exhibits a haplo-diplontic life cycle?

When an excess of $NaOH$ solution is added to a solution of potassium alum,what do we obtain?

Pepsin is inactivated at $pH$

The polio virus is a ..........

$A$ ball at rest is dropped from a height of $12 ~m$. It loses $25 \%$ of its kinetic energy on striking the ground and bounces back to a height '$h$'. Then the value of '$h$' is: (in $~m$)

In a galvanometer,$5 \%$ of the total current in the circuit passes through it. If the resistance of the galvanometer is $G$,the shunt resistance $S$ connected to the galvanometer is