Daily NEET MCQ- March 19, 2022 - NEET MCQ

Starch is present as a storehouse of energy in the plant tissues. Starch forms helical secondary structures which can hold iodine molecules in the helical portions. Therefore, the starch-iodine is blue.

Collagen is the most abundant protein in the animal world. Ribulose bisphosphate Carboxylase-oxygenase is the most abundant protein in the whole of the biosphere.

The most abundant organic compound present in the entire biosphere is cellulose. Cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide i.e., glucose. It is a homopolymer of glucose.

The distance between A and B is 10 units. The distance between B and C is 5 units. Hence, the total distance is 15 units. The total time taken is 100 s. Average speed = total distance/total time taken = 15/100 = 0.15 units/s.

From the given options, the only motion that can possibly have a uniformly accelerated motion in a plane is that of a particle. In circular motion the direction of the acceleration keeps changing and in a pendulum and in a spring, both the magnitude and directions keep changing.

Zeroth law of thermodynamics talks about thermal equilibrium or relates bodies having no heat flow. Temperature difference is what leads to heat flow. So, this law helped in making temperature measurable and an universal property of matter.

Alloys are combinations of metals or elements in the form of a compound or a solution. Transition elements are highly capable in forming alloys because they have similar atomic size and can substitute each of their positions in a crystal lattice.

Actinium is the first member of the actinoid series. Its atomic number is 89. The electronic configuration of actinium is [Rn]6d¹7s². It has only three electrons to lose. Therefore, actinium is generally only found in the +3-oxidation state.

The properties of scandium compounds are intermediate between those of aluminium and yttrium. A diagonal relationship exists between the behaviour of magnesium and scandium, just as there is between beryllium and aluminium. In the chemical compounds of the elements in group 3, the predominant oxidation state is +3.

There is very little variance in the atomic size of the actinoids and so, they show similar properties. 4f and 5f orbitals belong to different energy levels and so are unequally shielded. The same applies to the 4d and 5d orbitals. The d-block elements are known to show irregular and erratic chemical properties.