Which of the following is an example of a Gram-negative bacterium?

If the half-life of a reaction is halved when the initial concentration of the reactant is doubled,what is the order of the reaction?

The locus of the poles of focal chords of the parabola $y^2 = 4ax$ is

If $\int \frac{\sin x}{\cos x(1+\cos x)} d x=f(x)+c$,then $f(x)$ is equal to

$A$ micelle formed during the cleansing action by soap is

$A$ potentiometer consists of a wire of length $4\, m$ and resistance $10\,\Omega$. It is connected to a cell of $emf$ $2\, V$. The potential difference per unit length of the wire will be ............ $V/m$.