Entry Test MCQ :: Liquids and Solids

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41.

a?b?c ?????#90? is representation of crystal system

A.	Monoclinic	B.	Triclinic
C.	Hexagonal	D.	Trigonal

42.

The phenomenon in which a compound exists in two or more crystalline forms is called

A.	Isomorphism	B.	Polymorphism
C.	Anisotropy	D.	Allotropy

43.

Which solids are called true solids?

A.	Metallic	B.	Amorphous
C.	Crystalline	D.	Vitreous

44.

Bucky balls is an allotropic from of

A.	Sulphur	B.	Carbon
C.	Silica	D.	Tin

45.

The number amino acid units for each turn of helix on average are

A.	21	B.	23
C.	25	D.	27

46.

Isomorphic substances have

A.	Same physical and chemical properties	B.	Same physical and different chemical properties
C.	Different physical and same chemical properties	D.	Different physical and chemical properties

47.

If a physical and chemical change takes place at a constant pressure then the heat change during the process is called

A.	Heat of transition	B.	Heat of fusion
C.	Enthalpy change	D.	All of above

48.

The pressure during the molar heat of fusion is kept

A.	0 atmosphere	B.	one atmosphere
C.	2 atmosphere	D.	10 atmosphere

49.

The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is

A.	Molar heat of sublimation	B.	Molar heat of fusion
C.	Molar heat of vapourization	D.	Latent heat of that liquid

50.

All the enthalpy changes are

A.	Negative	B.	Positive
C.	May or may not be a or b	D.	none