Questions

No improvement required. Sentence is idiomatically correct.

Coagulation is a chemical process that involves neutralization of charge. Coagulation during water treatment is designed to remove particles suspended in water.

Here ‘passed each other’ means crossed each other’s path. No preposition is required by ‘passed’.

Thyroxin or Thyroxine is the thyroid hormone that regulates carbohydrate metabolism in the human body.

One of the thing that progressive support would be: Direct election of senators.

The progressive wanted this so they could the candidate based on the person and not the party.
Direct election of senators will make it easier for them to elect the person that represent their value for the position.

The strength of an electromagnet can be increased by increasing the cross-sectional area, increasing the number of turns, increasing current supply, increasing the length of the coiled wire.

The decentralization system was recommended by Balwant Rai Mehta.

The Quality Factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. higher the Q, the lower are the losses.

the quality factor is measurement of efficiency (or effectiveness) of a device or circuitry. In literal sense quality factor means qualitative performance of a device.