What is the other name for the structure shown in the given figure?

In a triangle,if $r_1 = 2r_2 = 3r_3$,then $\frac{a}{b} + \frac{b}{c} + \frac{c}{a}$ is equal to

The method of asexual reproduction in algae is -

In which of the following properties do the two enantiomers of lactic acid differ from each other?

Plants adapted to low light intensity have

The halide of a metal $MX$ crystallizes in a $ccp$ structure ($NaCl$ type). If all the atoms situated on one of the tetrad axes are removed,what will be the simplest molecular formula of the halide?