SATHEE: sblock Elements - Result Question 64

sblock Elements - Result Question 64

####16. The reagent(s) used for softening the temporary hardness of water is(are)

(2010)

(a) $C a_{3} {(P O_{4})}_{2}$

(b) $C a (O H)_{2}$

(d) $N a O C l$

Show Answer

Answer:

Correct Answer: 16. (b)

Solution:

Among the group-1 metals, only $L i$ is able to form its nitride, $L i_{3} N$ . [All alkaline earth metals of group-2 form their nitride, $M_{3} N_{2}]$

$6 L i + N_{2} ⟶ 2 L i_{3} N$ (Ruby red solid)

(Air)

$[3 I_{M} + N_{2} ⟶^{I I} M_{3} N_{2}]$

$L i^{\oplus}$ is the smallest metal ion of group-1. Smaller size of $L i^{\oplus}$ and larger size of nitride ion, $N^{3 -}$ , enable $L i^{\oplus}$ to polarise the spherical electron cloud of $N^{3 -}$ and it gives higher stability to $L i_{3} N$ .

sblock Elements - Result Question 64

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

sblock Elements - Result Question 64

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Menu