Among Group 16 elements, which one does NOT show -2 oxidation state?
Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to $$\mathrm{VI}$$.
A. $$\mathrm{Al}^{3+}$$
B. $$\mathrm{Cu}^{2+}$$
C. $$\mathrm{Ba}^{2+}$$
D. $$\mathrm{Co}^{2+}$$
E. $$\mathrm{Mg}^{2+}$$
Choose the correct answer from the options given below.
Match the List - I with List - II
| List - I (Hydride) |
List - II (Type of Hydride) |
||
|---|---|---|---|
| (A) | $$\mathrm{NaH}$$ | (I) | Electron precise |
| (B) | $$\mathrm{PH_3}$$ | (II) | Saline |
| (C) | $$\mathrm{GeH_4}$$ | (III) | Metallic |
| (D) | $$\mathrm{LaH_{2.87}}$$ | (IV) | Electron rich |
Choose the correct answer from the options given below :
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Helium is used to dilute oxygen in diving apparatus.
Reason R : Helium has high solubility in O$$_2$$.
In the light of the above statements, choose the correct answer from the options given below: