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

The pH of fresh milk is 6. When it turns sour, the pH

Two reactants in a flask produce bubbles and gas; it turns lime water into milky. The reactants in the flask are

Metalloids are