Daily NEET MCQ- July 28, 2022 - NEET MCQ

One mole of sucrose is C₁₂H₂₂O₁₁ The individual mass of carbon is 12 amu, the individual mass of hydrogen is 1 amu & the individual mass of oxygen is 16 amu. But sucrose has 12 carbons, 22 hydrogens and 11 oxygens, that is 12 x 12 + 22 x 1 + 11 x 16 = 342g.

Given that, 1 mole of ammonia is of 17 g. 0.3 mole of ammonia contains 17 x 0.3g of mass. IT’s because the molecular weight of a given pcompound is directly proportional to the number of moles of the given compound.

Let it be any compound, but one mole of a substance always contains Avogadro’s number of particles. In the above question, Avogadro’s number (6.022×10²³) is given by the letter “y”. so, in 1 mole of glucose, there is y number of particles.

Mass is one of the 7 primary quantities in the SI system. Density is dependent on mass and volume. Speed is dependent on length and time. And volume is dependent on length as its cube.

A fundamental dimension is one, whose units do not depend on the units of any other dimension. There are 7 fundamental dimensions in the SI system and rest all are derived from them.

Reynold’s number is a dimensionless quantity. Its formula is Re = ρvD/μ. On solving the associated dimensional equation, it will turn out that, Reynold’s number is dimensionless.

Urine is stored in the urinary bladder until a voluntary signal comes from the Central nervous system. The receptors present on the urinary bladder receive these signals.

The signal given by CNS is initiated by the stretching of the urinary bladder as it gets filled with the urine. In response, the stretch receptors on the walls of the bladder send signals to the CNS.

Urethral sphincter causes the release of urine to the outside of the body. This process starts when the central nervous system passes on the motor messages to the smooth muscles of the bladder. This signal initiates their contraction. Simultaneously, relaxation of the urethral sphincter takes place which causes the release of the urine.

The process of release of urine is called micturition and the neural mechanisms causing it is called micturition reflex. An adult human excretes about 1 to 1.5 litres of urine per day.