Enzymes are

In which of the following arrangements,the order is $NOT$ according to the property indicated against it?

The number of ways of arranging $8$ men and $4$ women around a circular table such that no two women can sit together is

If $\sin ^{-1} x+\sin ^{-1}(1-x)=\cos ^{-1} x$,then $x \in$

Which of the following is the correct order of lattice energy for the given ionic compounds?

Two identical flutes produce fundamental notes of frequency $300 \ Hz$ at $27^{\circ}C.$ If the temperature of air in one flute is increased to $31^{\circ}C,$ the number of beats heard per second will be