In which plant was the importance of day length for flowering first observed?

Pulses are obtained from which family?

The focus of the parabola $y = 2x^2 + x$ is

Which of the following reagents when heated with ethyl chloride,forms ethylene?

The oxidation number of $Pt$ in $[Pt(C_2H_4)Cl_3]^-$ is

$A$ rectangular loop of length $l$ and breadth $b$ is placed at a distance of $x$ from an infinitely long wire carrying current $i$ such that the direction of the current is parallel to the breadth. If the loop moves away from the current-carrying wire in a direction perpendicular to it with a velocity $v$,the magnitude of the induced emf in the loop is: ($\mu_0=$ permeability of free space)