Daily NEET MCQ- April 22, 2022 - NEET MCQ

The coefficient of restitution (e) is the ratio of the final to initial relative velocities in a collision system. If the value of e = 1, then the collision is perfectly elastic. If it is equal to 0, then the collision is perfectly inelastic.

A perfectly elastic collision occurs when the value of e is 1. When the value of e is less than one the collision starts to becomes inelastic.

At 970 Kelvin, an electric discharge 2 moles of hydrogen molecule combines with one mole of Oxygen in order to form 2 moles of water. This has an enthalpy change of about 285.9 KJ/mol, the enthalpy change is negative for the above process.

The order of reactivity of halogens with hydrogen is that Fluorine’s reactivity is greater than that of chlorine and chlorine’s reactivity is greater than that of bromine and bromine’s reactivity is greater than that of Iodine.

At 673 Kelvin and 200 atmospheric pressure, one mole of nitrogen combines with three moles of hydrogen in presence of iron and molybdenum in order to form 2 moles of ammonia and the enthalpy change is 92.6 KJ per Mol, the enthalpy here change is negative.

Apoplastic pathway is carried out as:

Epidermis -> cortex-> endodermis -> pericycle -> xylem.

Casparian strips are a part of endodermis which blocks the Apoplastic pathway. It is made up of suberin.

Positive and negative hydrostatic pressure are types of bulk flow where substances move independently but still all the substances move together. It occurs due to pressure differences between two points.

Plasmodesmata is the connections through which cytosol movement take place. Xylem is used for water, minerals, organic nitrogen and hormones. Phloem is used for organic and inorganic solutes. Vascular tissues consist of xylem and phloem, together carrying out complete translocation.

Root hairs arise from region of maturation of the root system. They help in increasing area for absorption. Casparian strips are a part of endodermis which blocks the apoplastic pathway. Sieve plates are long columns with holes in the end walls of sieve tube cells of phloem. Tracheids are non-living parts of xylem where water enters directly.

Mycorrhiza is the symbiotic association of fungus with the root of the plant. Ureides is a form of nitrogen in which nodules of plants like soyabean export fixed nitrogen. Mutualism is the association where both the partners are interdependent such as plants and animals. Nodules are general associations of legume plants and bacteria.