Who first discovered protoplast fusion?

If $\vec{a}, \vec{b}, \vec{c}$ are mutually perpendicular vectors having magnitudes $1, 2, 3$ respectively,then $[\vec{a}+\vec{b}+\vec{c} \quad \vec{b}-\vec{a} \quad \vec{c}]=$

If the area of the triangle formed by the pair of lines $8x^2 - 6xy + y^2 = 0$ and the line $2x + 3y = a$ is $7$,then $a$ is equal to

When acetaldehyde is reacted with $LiAlH_4$,what is the product formed?

Which of the following cations cannot give the borax bead test?

In which of the following is the hydration energy higher than the lattice energy?