Which one among the following is the chemical formula of gypsum which is an ingredient of cement?

The pure form of carbon is

Sodium stearate is a salt and is used

The principle of cleaning by soap is

Imagine a current carrying wire with the direction of current downward or into the page. The direction of magnetic field lines is

The motion of an electron in presence of a magnetic field is depicted in the figure.

Force acting on the electron will be directed