Enzymes are

Two dice are rolled simultaneously. The probability that the sum of the two numbers on the dice is a prime number is:

Which of the following is not used in Friedel-Crafts reaction?

Curie temperature is the temperature above which :

The transformed equation of $x^2+y^2=r^2$ when the axes are rotated through an angle $36^{\circ}$ is

$A$ thin wire of length $l$ and mass $M$ is bent in the form of a semicircle. What is its moment of inertia about an axis passing through the ends of the wire?