PHASE RULE-1

1.Gibbs phase rule for general system:

• (a) P+F=C-1

• (b) P+F=C+1

• (C) P+F=C-2

• (d) F =C-P+2

2.A phase diagram shows the relationship between

• pressure, volume, and the three phases of matter

• temperature, pressure, and the three phases of matter

• temperature, volume, and the three phases of matter

• Non of the above

Tags

NGSS.HS-PS3-4

3. How many phases and components are present in the following systems?

• a) 2,2

• b) 2,1

• c) 1, 1

• c) 1,2

Tags

NGSS.HS-ESS2-5

4. How many components are present in the following systems?           

KCl + Water   $\rightarrow$      KCl hydrate

• a) 3

• b) 2

• c) 1

• d) 4

What is meant by triple point ?

• Three phases are in equilibrium

• Three components are in equilibrium

• Degree of freedom is three

• Non of the above

What is meant by invariant point ?

• Degree of freedom is zero

• Number of component is zero

• Number of phases is zero

• Non of the above

Which statement is incorrect in the following

• Triple point of water exist at 0.0075⁰ C and at 4.5mm pressure

• At triple point of water all the three phases of water co-exist 
  
  Solid cie      $\leftrightarrow$       Liquid water    $\leftrightarrow$     Vapour

• Triple point of water is an invariant point Degree of freedom F =0

• At the triple point of water number of phases are equal to three

Tags

NGSS.HS-ESS2-5

 $\leftrightarrow$  Determine the number of phases, components and number of degrees of freedom for the following systems :
(i) N2(g) + O2(g)   $\leftrightarrow$   2NO(g)
(ii) Na2SO4 .10H2O   $\leftrightarrow$       Na2SO4 + 10H2O(g)

• a) p= 1, F =3

• b)P= 1, F =1

• c) p= 3, F =2

• d) p= 2, F =3

What is sublimation?

• phase change between solid and liquid

• phase change from solid to gas

• phase change from solid to solid

• pahse change from gas to solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

All phase changes (changing states) requires energy to be added or taken away.

• True

• False

Tags

NGSS.MS-PS1-4