Chemistry Test - 28

A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table.

The order of the ligands in terms of splitting caused by them (Spectrochemical series) is H₂O < NH₃ < NO₂.

Greater the octahedral splitting, higher will be the energy barrier created for the electrons showing the d-d transitions, and shorter the wavelength of the light adsorbed.

The correct order of the wavelengths of absorption of complexes of nickel in the visible region is [Ni(NO₂)₆]^4- < [Ni(NH₃)₆]²⁺ < [Ni(H₂O)₆]²⁺.

If a non-volatile solute will be added in benzene at \(30^{\circ} \mathrm{C}\), its vapour pressure will decreases.

In pure benzene, the entire surface is occupied by the molecules of the benzene. At a given temperature, if a non-volatile solute is added to the benzenes to form a solution, the surface has both solute and solvent molecules, so that the fraction of the surface covered by the benzene molecule gets reduced. Also, the number of benzene molecules escaping from the surface is get reduced, thus the vapour pressure is also reduced. The decrease in the vapour pressure of solvent only depends on the quantity of non-volatile solute present in the solution.

A compound whose molecules are super imposable on their mirror images, even when they contain asymmetric carbon atoms is called a meso compound.

If a non-volatile solute will be added in benzene at \(30^{\circ} \mathrm{C}\), its vapour pressure will decreases.

In pure benzene, the entire surface is occupied by the molecules of the benzene. At a given temperature, if a non-volatile solute is added to the benzenes to form a solution, the surface has both solute and solvent molecules, so that the fraction of the surface covered by the benzene molecule gets reduced. Also, the number of benzene molecules escaping from the surface is get reduced, thus the vapour pressure is also reduced. The decrease in the vapour pressure of solvent only depends on the quantity of non-volatile solute present in the solution.

The correct order will be Li > Na > K as the value of the first ionisation energy decreases on moving down the group in the periodic table.

Maltose is converted to glucose by enzyme maltase.

Biotin is an organic compound present in yeast. Its deficiency in diet causes dermatitis and paralysis. It is also known asVitamin H.

Biotin is a part of the vitamin B family and it is a water-soluble compound. Our body needs biotin to help convert some nutrients into energy and plays an important role in the health of your hair, skin, and nails. We get biotin from some dietary sources like Egg yolk, Salmon, Oats, Wheat, Dairy, Spinach, Rice, nuts, bananas,cauliflower, legumes etc.Biotin is also called as Vitamin B₇, Vitamin \(\mathrm{H}\), Coenzyme \(\mathrm{R}\), anti-egg-white injury factor.