Daily NEET MCQ- July 16, 2022 - NEET MCQ

Since heptane is a larger group than benzene, it is chosen as the parent hydrocarbon and the compound is named as an aryloxy derivative of heptane.

The base hydrocarbon is ethane, in which one hydrogen of each carbon atom is replaced by a methoxy group, making it a dimethoxy ether.

This is an aromatic ether with a methoxy substituent and has the common name anisole or methyl phenyl ether.

The speed of any point w.r.t the centre is equal to R⍵,
where ‘ω’ is the angular speed & ‘R’ is the distance of that point from the centre.
In pure rolling motion, we know that V = Rω,
where V is the velocity of centre of mass.
∴ The velocity of centre of mass = 5m/s, since Rω = 5.

Let the time taken for one rotation be ‘T’. Let the angular speed of the wheel be ‘w’. w = 2π/T.
The velocity of the centre is Rw = R*2π/T.
∴ Distance moved by it = R*2π/T*T
= 2πR.

Friction will be acting on the ring, which is the reason it is able to roll purely. But this friction will not do any work on the ring. The potential energy at the top will be converted into kinetic energy at the bottom. Kinetic energy is given by: 1/2MV² + 1/2Iw². I for a ring = MR² & w = V/R.
∴ kinetic energy = 1/2MV² + 1/2MV² = MV².
Potential energy at the top = Mgh.
Therefore, Mgh = MV² OR V = √(gh) m/s.

During the process of respiration, oxygen is utilised and carbon-dioxide, water and energy are released as products. The combustion reaction requires oxygen.

The first cells on this planet lived in an atmosphere that lacked oxygen. Even among present-day living organisms, we know of several organisms that are adapted to anaerobic conditions.

In any case, all living organisms retain the enzymatic machinery to partially oxidise glucose without the help of oxygen. This breakdown of glucose to pyruvic acid is called glycolysis.

Glycolysis occurs in the cytoplasm of the cell and is present in all the living organisms. In anaerobic organisms, it is the only process in respiration.