Daily NEET MCQ- August 16, 2022 - NEET MCQ

In sublimation, the solid substance transforms directly to the vapor state without entering into the liquid state. This helps in separating sublimable compounds from non-sublimable ones. Whereas the other three, i.e. crystallization, distillation and differential extraction are used when a suitable solvent is involved. In other words, they deal with mainly liquids and not solids alone.

The process of distillation is based on the difference in the boiling points of the liquids. This is because, liquids having different boiling points vaporize at different temperatures. In this way, the vapors cooled can be collected separately from the liquid formed. Crystallization is used to separate volatile liquids from non-volatile liquids as well.

A seperatory funnel is used in differential extraction. Differential extraction involves separating the immiscible organic compound from the aqueous solvent. The separating funnel aids in this process of separating immiscible liquids. It also helps in layer formation, with the denser solvent at the bottom and the other on top. This layer formation is important for the process, and thus, separatory funnel is chosen as the apparatus for differential extraction.

The vertical component of any vector with magnitude a is a sin θ. Here θ = 60. sin θ = ½. Hence the answer is 50/2 = 25 N.

The magnitude of any vector can be found by taking the square root of sum of the squares of its two components. Hence, the sum of the squares of components is equal to 4² + 3² = 25. Square root of 25 = 5. Hence, the answer is 5.

A vector can be resolved in number of components. But, the number of components has to be equal to the number of independent directions available. It can only be resolved into independent directions no matter how many they are.

The acid-insoluble fraction, has only four types of organic compounds, i.e., proteins, nucleic acids, polysaccharides and lipids. These classes of compounds except for lipids have molecular weights in the range of ten thousand Daltons and above.

Biomolecules which are the chemical compounds found in the living organisms are of two types. One, those which have molecular weights less than one thousand Dalton and two which are found in the acid-insoluble fraction.

The molecules in the insoluble fraction except for lipids are polymeric substances, which means that proteins, nucleic acids and polysaccharides exists as polymeric substances.

The acid-soluble pool represents roughly the cytoplasmic composition. The macromolecules from the cytoplasm and the organelles become the acid-insoluble fraction.