Daily NEET MCQ- March 12, 2022 - NEET MCQ

Electric heater does not involve Eddy currents. It uses Joule's heating effect.

Drugs are mainly classified on the basis of four criteria, namely pharmacological effect, drug action, chemical structure and molecular targets in the body.

Pharmacological effects of drugs provides a wide range of drugs that have a same effect on a specific type of problem. Analgesics have pain killing effect, antiseptics prevent the growth of microbes and antipyretics help in lowering body temperature during fever.

There are lots of different types of receptors in the body at different locations. They interact with different kinds of chemical messengers. Their selectivity for one messenger over the other is because of the difference in their binding sites, structure and composition of amino acids.

With repeated use of drugs, the tolerance level of receptors present in our body increases. Consequently, the receptors only respond to higher doses of drugs or alcohol leading to greater intake and addiction.

Certain sportspersons misuse drugs to enhance their performance. They misuse narcotic analgesics, anabolic steroids, diuretics and certain hormones in sports to increase muscle strength and to promote aggressiveness and as a result, increase athletic performance.

Good parenting that combines with high levels of nurturance and consistent discipline, has been associated with lowered risk of substance (alcohol/drugs/tobacco) abuse. It is best to identify the situations that may push an adolescent towards the use of drugs or alcohol and to take remedial measures well in time.

The molar mass of AgBr = 108 + 80
= 188 g
So, 188 g of AgBr contains 80 g of Br.
Then, 0.200 g of AgBr contains 80 * 0.200/ 188 = 0.085 g bromine
Therefore, percentage of bromine = 0.085 * 100/ 0.450
= 18.91%
Thus, the percentage of bromine (halogen) using Carius method is 18.91%.

During quantitative analysis, a known quantity of the organic compound is burned in the presence of excess of oxygen and copper (II) oxide. The carbon present in the compound is oxidized to carbon dioxide and the hydrogen is transformed to water.

P/Fv is a dimensionless quantity. This is because, power(P) = Force(F) x Instantaneous Velocity(v).