Daily NEET MCQ- April 1, 2022 - NEET MCQ

Joints are found between bones. Their functions include articulations of bones to each, permitting bones to grow, and enabling movement and locomotion. Joints do not support the body like bones do.

Joints are found between bones and between bones and cartilages. Hence, they are the points of contact bones and cartilage. Ligaments attach bone to bone while tendons attach bone to muscle.

The points of connection of bones to each other and to cartilages are called joints. They are of three types, namely fibrous joints, cartilaginous joints and synovial joints. Connective is a classification of tissue.

For a carnot cycle: Q₂/Q₂ = T₂/T₁.
T₂ = 12/4 * 298 = 894K.

The efficiency of a carnot engine is:
1- T₂/T₁ = 1-150/200 = 1/4.
Efficiency is also given by: 1 – Q₂/Q₁ = 1 – Q₂/1200 = 1/4.
Q₂ = 3/4 *1200 = 900J.

0.5 = 1 – T_C/T_H.
And 0.6 = 1 – (T_C + x)/T_H.
From the first equation we get: 5/10 = T_C/T_H.
From the second equation we get: 4/10 = (T_C + x)/T_H.
Now, we see that the value of x must be 1K.

The Fullerenes are C₆₀ molecules which contain 12 five-membered rings and 20 six remembered rings, the five-membered rings are connected to six-membered rings while six-membered rings are connected to both five and six-membered rings.

Graphite is a form of crystalline allotropes of carbon the suspension of graphite in water is known as aqua dag and the suspension of graphite in oil lubricants is known as oil Dag. Aqua dag is commonly used in cathode ray tubes.

Diamond, fullerenes come and graphite are crystalline allotropes of carbon whereas lampblack is an amorphous form of carbon, which is obtained by burning vegetable oils in a limited supply of air and it is also used in the manufacture of printing ink, black paint, varnish, and carbon paper.

The crystalline form of allotropic carbon is diamond, it is the hardest and has a three-dimensional polymeric structure in which hybridization of carbon is sp³. It is covalent solid, melting point is 3650-degree centigrade and it is also a bad conductor of heat and electricity.