Find out the number of following orders which are not correct against the mentioned properties : (I) CaH 2

Question

Find out the number of following orders which are not correct against the mentioned properties :

(I) $CaH_{2} < BeH_{2}$ (Electrical conductance in molten condition)

(II) $LiH < NaH < CsH$ (Ionic character)

(III) $H_{2} < D_{2} < F_{2}$ (Bond dissociation enthalpy)

(IV) $NaH < MgH_{2} < H_{2} O$ (Reducing property)

TestHub · Accepted Answer

Question Explanation:

Identify incorrect orders of chemical properties.

Concept: Properties of different hydrides.

Solution:

(i)

(Electrical conductance)

(ii)

$Δ EN \propto$ Ionic character

(iii) $D_{2} > H_{2} > F_{2}$ : Bond dissociation enthalpy

(iv) $H_{2} O$ do not have higher reducing nature than ionic hydrides rather it is covalent compound Final Answer: 3

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