The suspension of slaked lime in water is known as

$19 \ g$ of a mixture containing $NaHCO_3$ and $Na_2CO_3$ on complete heating liberated $1.12 \ L$ of $CO_2$ at $STP$. The weight of the remaining solid was $15.9 \ g$. What is the weight (in $g$) of $Na_2CO_3$ in the mixture before heating?

It includes multicellular,aquatic or terrestrial,photosynthetic eukaryotic organisms.

Which method is used to obtain virus-free plants?

Which of the following is a square planar complex ion?