What is released when washing soda is heated?

Which of the following statements is incorrect?

$A$ conducting bar is pulled with a constant speed $v$ on a smooth conducting rail. The region has a steady magnetic field of induction $B$ as shown in the figure. If the speed of the bar is doubled then the rate of heat dissipation will

The principal value of ${\sin ^{ - 1}}\left( { - \frac{1}{2}} \right)$ is

The expression $1+x \log _e a+\frac{x^2}{2 !}(\log _e a)^2+\frac{x^3}{3 !}(\log _e a)^3+\ldots$ for $a>0, x \in R$ is equal to:

The $DNA$ of $E. coli$ is . . . . . . .