Chemistry Test ...

The hydrolysis of sucrose has an equilibrium constant Kc = 2 × 10¹³ at 300 K. What is the sign of ΔG^∘ for this reaction?

According to Kohlrausch’s law, the limiting molar conductivity of CaCl₂ can be expressed as:

The experimentally observed bond length in the ozone (O₃) molecule is 128 pm. Which of the following best explains this observation?

A newly discovered co-enzyme C required for the activity of a human oxidoreductase is suspected to be either a nicotinamide-derived vitamin or a riboflavin-derived vitamin. A 0.50 mM aqueous solution of C shows an absorbance of 0.42 at 260 nm in a 1.0 cm cuvette, but no significant absorbance at 450 nm. When 1.0 × 10⁻⁴ mol of C is completely hydrolysed, it yields 1.0 × 10⁻⁴ mol of a phosphoric acid–stable fragment that gives a positive Tollens’ test and reduces Benedict’s solution at pH 10.7, 298 K. The same molar quantity of C, upon exhaustive enzymatic dephosphorylation followed by acid hydrolysis, gives 2.0 × 10⁻⁴ mol of NH₃ and 1.0 × 10⁻⁴ mol of a neutral, optically active, 6-carbon aldaric acid whose meso-form is not optically active. Identify the correct statement about C.

The concentration of a reactant decreases from 0.2 M to 0.1 M in 10 minutes. The rate of the reaction is

An aqueous solution of titanium chloride, when subjected to magnetic measurement, measured zero magnetic moment. Assuming the octahedral complex in aqueous solution, the formulae of the complex is:

The pair in which both species have same magnetic moment (spin only value) is

Equal masses of a solute are dissolved in equal amount of two solvents A and B, respective molecular masses being M_A and M_B . The relative lowering of vapour pressure of solution in solvent A is twice that of the solution in solvent B. If the solutions are dilute, M_A and M_B are related as

Which of the following is the sweetest sugar

Principal quantum number of an atom represents