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BITSAT 2024Paper 2
Exam
BITSAT
Year
2024
Paper
Paper 2
Subject
Chemistry
Chapter
Hydrogen

BITSAT 2024 · Paper 2 · Chemistry · Hydrogen

Among the following the correct statements are I. LiH, BeH_2 and...

Among the following the correct statements are I. LiH,BeH2\mathrm{LiH}, \mathrm{BeH}_2 and MgH2\mathrm{MgH}_2 are saline hydrides with significant covalent character II. Saline hydrides are volatile III. Electron - precise hydrides are Lewis bases IV. The formula for chromium hydride is CrH

Options

  1. AI, III only
  2. BII, IV only
  3. CI, IV only
  4. DIII, IV only

Correct answer

C. I, IV only

Step-by-step solution

Saline hydrides are not volatile as the strong ionic bonds keep the constituent ions together. Thus, statement II is incorrect. Electron-precise hydrides like CH4,SiH4\mathrm{CH}_4, \mathrm{SiH}_4, act as pH - neutral species. Thus, statement 3 is incorrect.
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