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Gases, Liquids & Solids
Which of the following properties is anisotropic?
- Melting Point
- Electrical Conductivity
- Geometrical Shape
Physical properties that depend on the direction are called anisotropic properties. The physical properties of crystalline solids like refractive index, coefficient of thermal expansion, electrical and thermal conductivity, and cleavage plane are anisotropic in nature.
If we have 450g of a NaCL solution that is 35 NaCL w/w %. What is the mass of NaCL?
- 128.5 g
- 157.5 g
- 184.5 g
- 200 g
% by weight = (Mass of solute/Mass of solution) * 100
35 = (X/450) *100
X = 35 * 450/100 = 157.5 g
What is the half-life of a third order reaction if k = 1 and a = 0.2 M?
- 5 s
- 5 s
- 25 s
- 5 s
[t1/2] = 1.5/ka2;
Putting values [t1/2] = 1.5/(0.2)2 = 37.5 s.