Practice MCQ Questions and answers on Chemistry-GK

The second law of thermodynamics can be stated in terms of entropy. In an irreversible process, entropy always increases, so the change in entropy is positive. The total entropy of the universe is continually increasing. There is a strong connection between probability and entropy.

In a reaction of the type A+B -> C+D one could ensure it to be a first order reaction by increasing the concentration of a reactant.

In physics and engineering, kinetics is the branch of classical mechanics that is concerned with the relationship between motion and its causes, specifically, forces and torques. The term kinetics is also used to refer to chemical kinetics, particularly in chemical physics and physical chemistry.

The Bhopal disaster, also referred to as the Bhopal gas tragedy, was a gas leak incident in India, considered one of the world’s worst industrial disasters. It occurred on the night of 2–3 December, 1984 at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh. Over 500,000 people were exposed to methyl isocyanate gas and other chemicals. The toxic substance made its way in and around the shantytowns located near the plant. Estimates vary on the death toll. The official immediate death toll was 2,259. The government of Madhya Pradesh confirmed a total of 3,787 deaths related to the gas release. Others estimate 8,000 died within two weeks and another 8,000 or more have since died from gas-related diseases.

A sedimentation tank allows suspended particles to settle out of water or wastewater as it flows slowly through the tank, thereby providing some degree of purification. A layer of accumulated solids, called sludge, forms at the bottom of the tank and is periodically removed.

Ferrous sulphate is used in water treatment as a/an Coagulant aid.

Charcoal is used in water treatment as adsorbent.

CO (Carbon monoxide) is a secondary pollutant.

Ultraviolet radiation striking the earth is due to the depletion of ozone.

Many people died in London in 1952 as result of air pollution producing smog.