To solve the given matching problem, we need to correctly associate reagents from Column II to the compounds in Column I based on their typical chemical reactions or tests in chemistry.
The correct matching is: A-P, B-Q, C-S, D-R.
| Column I | Column II |
|---|---|
| Aniline | Hinsberg reagent (P) |
| Benzaldehyde | Tollen's reagent (Q) |
| Phenol | Phthalein dye test (S) |
| Isopropanol | Lucas reagent (R) |
Which of the following statements are true?
A. Unlike Ga that has a very high melting point, Cs has a very low melting point.
B. On Pauling scale, the electronegativity values of N and C are not the same.
C. $Ar, K^{+}, Cl^{–}, Ca^{2+} and S^{2–}$ are all isoelectronic species.
D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si $>$ Al $>$ Mg $>$ Na.
E. The atomic radius of Cs is greater than that of Li and Rb.
Choose the correct answer from the options given below: