In which of the following reactions does $H_2O_2$ act as a reducing agent?

If $\cos x + \cos^2 x = 1$,then the value of $\sin^2 x + \sin^4 x$ is

The lines $2x + 3y = 6$ and $2x + 3y = 8$ cut the $X$-axis at $A$ and $B$,respectively. $A$ line $L$ drawn through the point $(2, 2)$ meets the $X$-axis at $C$ in such a way that the abscissae of $A, B,$ and $C$ are in arithmetic progression. Then,the equation of the line $L$ 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 $mH$)

In any $\triangle ABC$,$a(b \cos C - c \cos B)$ equals

Which of the following is known as the pitcher plant?