Which of the following substances is known as lead sugar?

The order and degree of the differential equation $\sqrt{\frac{dy}{dx}} - 4\frac{dy}{dx} - 7x = 0$ are

If $A+2 B=\begin{bmatrix} 1 & 2 & 0 \\ 6 & -3 & 3 \\ -5 & 3 & 1 \end{bmatrix}$ and $2 A-B=\begin{bmatrix} 2 & -1 & 5 \\ 2 & -1 & 6 \\ 0 & 1 & 2 \end{bmatrix}$,then $\operatorname{Tr}(A)-\operatorname{Tr}(B) = $

The set $\{x \in R : [x - |x|] = 5\}$ is equal to

The three-domain system of classification is based on which of the following criteria?

$EAN$ of complex $[Fe(C_2O_4)_3]^{3-}$ is