JEE Main 2019ChemistryHydrogenHardMCQ

JEE Main 2019Hydrogen Question with Solution

JEE Main 2019 (10 Apr Shift 2)

Question

The correct statements among a to d are:

a Saline hydrides produce H2 gas when reacted with H2O.

b Reaction of LiAlH4 with BF3 leads to B2H6 .

c PH3 and CH4 are electron - rich and electron - precise hydrides, respectively.

d HF and CH4 are called as molecular hydrides.

Choose an option

Show full solutionCorrect option: D
Correct answer
Da, b, c and d

Step-by-step explanation

(1) Saline hydrides are ionic hydrides such as LiH, NaH. When reacting with water to form a Base and hydrogen gas.

MHs+H2Oaq MOHaq+H2

(2) BF3 when reacts with LiAlH4 produces B2H6

(3)  

(4) Molecular hydrides are also called covalent hydrides. HF and CH4 are covalent or molecular hydrides.

Hence, all statements are correct.

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About this question

This is a previous-year question from JEE Main 2019, covering the Hydrogen chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.