Mating of an organism to a double recessive in order to determine whether it is homozygous or heterozygous for a character under consideration,is called

$A$ large open tank has two holes in the wall. One is a square hole of side $L$ at a depth $y$ from the top and the other is a circular hole of radius $R$ at a depth $4y$ from the top. When the tank is completely filled with water,the quantities of water flowing out per second from both the holes are the same. Then $R$ is equal to

In the reaction,the major product formed is:

Which one of the following gives Prussian blue colour?

At low pressure,the van der Waals equation becomes:

The spin magnetic moment of cobalt in the compound $Hg[Co(SCN)_4]$ is