Which is $NOT$ an example of a macromolecular colloid?

Which one of the following ecosystem types has the highest annual net primary productivity?

If two angles of $\triangle ABC$ are $45^{\circ}$ and $60^{\circ}$,then the ratio of the smallest side to the greatest side is:

$A$ coil of wire of radius $r$ has $600$ turns and a self-inductance of $108 \ mH$. The self-inductance of a coil with the same radius and $500$ turns is: (in $mH$)

Which of the following elements is used in thermometry at high temperatures?

Which one of the following is correct?