8. Give reasons of the following: (a) Ionic compounds have high melting and
boiling points. (b) Ionic compounds are good conductors of electricity in fused state or aqueous solution.
Answers
Answer:
Why Do Ionic Compounds Have High Melting Points? ... The strong force of attraction between oppositely charged ions means that ionic compounds have high melting and boiling points. When dissolved in water ionic compounds form a solution in which ions can move.
Ionic compounds are good conductors of electricity in the fused state(or in aqueous) state because the electrostatic forces of attraction weaken in fused state or in solution state. Hence ions become mobile.
Explanation:
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Answer:
Answer:
Given :-
Sides of triangular plot = 2:3:4
Perimeter = 450 m
To Find :-
Area
Solution :-
Let sides be x
Firstly let's find all sides of triangle
As we know that Perimeter is the sum of all sides
\sf \: 2x + 3x + 4x = 4502x+3x+4x=450
\sf \: 9x = 4509x=450
\sf \: x = \dfrac{450}{9}x=
9
450
\sf \: x = 50x=50
Let's find angles
\sf \: 2(50) = 1002(50)=100
\sf3(50) = 1503(50)=150
\sf \: 4(50) = 2004(50)=200
Now,
Let's find its semiperimeter
\sf \: s = \dfrac{a + b + c}{2}s=
2
a+b+c
\sf \: s = \dfrac{100 + 150 + 200}{2}s=
2
100+150+200
\sf \: s = \dfrac{450}{2} = 225s=
2
450
=225
Now,
Let's find Area by herons formula.
\huge \bf \green{\sqrt{s(s - a)(s - b)(s - c)} }
s(s−a)(s−b)(s−c)
\tt \mapsto \sqrt{225(225- 100)(225 - 150)(225 - 200)}↦
225(225−100)(225−150)(225−200)
\tt \mapsto \: \sqrt{225\times 125\times 75 \times 25}↦
225×125×75×25
\tt \mapsto \: \sqrt{(15 \times 15) (25 \times 5)(25 \times 3)(5 \times 5)}↦
(15×15)(25×5)(25×3)(5×5)
\tt\sqrt{15 {}^{2} \times 5{}^{2} \times 5 \times {5}^{2} \times }
15
2
×5
2
×5×5
2
×
\tt \: 1875× \sqrt{15}1875×
15
\huge \tt \mapsto 1875× \sqrt{15}{m}^{2}↦1875×
15
m
2
Diagram :-
\setlength{\unitlength}{1 cm}\begin{picture}(0,0)\thicklines\qbezier(1, 0)(1,0)(3,3)\qbezier(5,0)(5,0)(3,3)\qbezier(5,0)(1,0)(1,0)\put(2.85,3.2){$\bf A$}\put(0.5,-0.3){$\bf C$}\put(5.2,-0.3){$\bf B$}\end{picture}