Boric acid is an acid because its molecule

In a compound microscope,the focal lengths of two lenses are $1.5 \, cm$ and $6.25 \, cm$. An object is placed at $2 \, cm$ from the objective lens and the final image is formed at $25 \, cm$ from the eye lens. The distance between the two lenses is.......$cm$.

The ratio of rates of diffusion of gases $X$ and $Y$ is $1:5$ and that of $Y$ and $Z$ is $1:6$. The ratio of rates of diffusion of $Z$ and $X$ is

Which system of classification is used by most of the world's well-known herbaria?

Hydrolysis of $NCl_3$ gives $NH_3$ and $X$. Which of the following is $X$?

Identify from the following,a hormone produced by the pituitary gland in both males and females but functional only in females.