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
The number amino acid units for each turn of helix on average are____________________?
(A) 21
(B) 23
(C) 25
(D) 27
Which solids are called true solids _______________?
(A) Metallic
(B) Amorphous
(C) Crystalline
(D) Vitreous
The viscosity of solids is________________?
(A) Infinite
(B) Negligible
(C) Medium
(D) No concept of viscosity in solid
Crystalline solids can be identified easily from their ___________________?
(A) Sharp melting point
(B) Definite geometry
(C) Transition temperature
(D) Colour
A malleable solid is one which can be_________________?
(A) Converted into wires
(B) Converted into thin sheets
(C) Melted easily
(D) All of the above
Crystallites are present in_________________?
(A) crystalline solids
(B) amorphous solids
(C) liquid crystals
(D) all of the above
Molar heat of vaporization of water is_________________?
(A) 40.7 KJ/mole
(B) 40.7 J/mole
(C) 40.7 cal/mole
(D) 40.7 Kcal/mole
Angle of deflection was studied by________________?
(A) Hitorff
(B) Stoney
(C) William Crookes
(D) J.Perrin